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1. 
Classify the computers that are used to control air traffic in the airport. Explain your answer. (Answered)
Classify the computers that are used to control air traffic in the airport. Explain your answer. .
Posted On:Fri 12, March 2021 21:38:40 pm
Classify the computers that are used to control air traffic in the airport. Explain your answer. (Answered)Classify the computers that are used to control air traffic in the airport. Explain your answer. .
Posted On:Fri 12, March 2021 21:38:40 pm
2. Give a short description of three types of microcomputers. (Answered)
Give a short description of three types of microcomputers. .
Posted On:Fri 12, March 2021 21:37:19 pm
Give a short description of three types of microcomputers. (Answered)Give a short description of three types of microcomputers. .
Posted On:Fri 12, March 2021 21:37:19 pm
3. Differentiate between the home and end keys on the keyboard. (Answered)
Differentiate between the home and end keys on the keyboard. .
Posted On:Fri 12, March 2021 21:35:58 pm
Differentiate between the home and end keys on the keyboard. (Answered)Differentiate between the home and end keys on the keyboard. .
Posted On:Fri 12, March 2021 21:35:58 pm
4. Mention four ways of preventing dust accumulation in a computer laboratory and on computer
systems and equipment. (Answered)
Mention four ways of preventing dust accumulation in a computer laboratory and on computer systems and equipment. .
Posted On:Fri 12, March 2021 21:34:48 pm
Mention four ways of preventing dust accumulation in a computer laboratory and on computer
systems and equipment. (Answered)Mention four ways of preventing dust accumulation in a computer laboratory and on computer systems and equipment. .
Posted On:Fri 12, March 2021 21:34:48 pm
5. Name the generation of computers that used the following devices for the first time.
i)Floppy disk ii)Optical disk
iii)Voice recognition devices
iv)Monitor. (Answered)
Name the generation of computers that used the following devices for the first time. i)Floppy disk ii)Optical disk iii)Voice recognition devices iv)Monitor. .
Posted On:Fri 12, March 2021 21:33:36 pm
Name the generation of computers that used the following devices for the first time.
i)Floppy disk ii)Optical disk
iii)Voice recognition devices
iv)Monitor. (Answered)Name the generation of computers that used the following devices for the first time. i)Floppy disk ii)Optical disk iii)Voice recognition devices iv)Monitor. .
Posted On:Fri 12, March 2021 21:33:36 pm
6. Define peripheral devices. Give any two examples. (Answered)
Define peripheral devices. Give any two examples. .
Posted On:Fri 12, March 2021 21:32:41 pm
Define peripheral devices. Give any two examples. (Answered)Define peripheral devices. Give any two examples. .
Posted On:Fri 12, March 2021 21:32:41 pm
7. List three precautions that should be taken when laying cables in a computer laboratory. (Answered)
List three precautions that should be taken when laying cables in a computer laboratory. .
Posted On:Fri 12, March 2021 21:31:44 pm
List three precautions that should be taken when laying cables in a computer laboratory. (Answered)List three precautions that should be taken when laying cables in a computer laboratory. .
Posted On:Fri 12, March 2021 21:31:44 pm
8. Outline the procedure for shutting down a computer. (Answered)
Outline the procedure for shutting down a computer. .
Posted On:Fri 12, March 2021 21:30:54 pm
Outline the procedure for shutting down a computer. (Answered)Outline the procedure for shutting down a computer. .
Posted On:Fri 12, March 2021 21:30:54 pm
9. Explain how a cordless mouse works. (Answered)
Explain how a cordless mouse works. .
Posted On:Fri 12, March 2021 21:30:05 pm
Explain how a cordless mouse works. (Answered)Explain how a cordless mouse works. .
Posted On:Fri 12, March 2021 21:30:05 pm
10. Describe the following mouse actions. (Answered)
Describe the following mouse actions. .
Posted On:Fri 12, March 2021 21:29:17 pm
Describe the following mouse actions. (Answered)Describe the following mouse actions. .
Posted On:Fri 12, March 2021 21:29:17 pm
12. Give three ways in which computers are used in the health sector. (Answered)
Give three ways in which computers are used in the health sector. .
Posted On:Fri 12, March 2021 21:25:07 pm
Give three ways in which computers are used in the health sector. (Answered)Give three ways in which computers are used in the health sector. .
Posted On:Fri 12, March 2021 21:25:07 pm
13. State four precautions that should be taken when handling a diskette. (Answered)
State four precautions that should be taken when handling a diskette. .
Posted On:Fri 12, March 2021 21:22:55 pm
State four precautions that should be taken when handling a diskette. (Answered)State four precautions that should be taken when handling a diskette. .
Posted On:Fri 12, March 2021 21:22:55 pm
14. Give one application of a floppy disk. (Answered)
Give one application of a floppy disk. .
Posted On:Fri 12, March 2021 21:21:48 pm
Give one application of a floppy disk. (Answered)Give one application of a floppy disk. .
Posted On:Fri 12, March 2021 21:21:48 pm
15. List any three embedded computers. (Answered)
List any three embedded computers. .
Posted On:Fri 12, March 2021 21:21:11 pm
List any three embedded computers. (Answered)List any three embedded computers. .
Posted On:Fri 12, March 2021 21:21:11 pm
16. State and explain three behaviors that should be avoided in a computer laboratory. (Answered)
State and explain three behaviors that should be avoided in a computer laboratory. .
Posted On:Fri 12, March 2021 21:20:23 pm
State and explain three behaviors that should be avoided in a computer laboratory. (Answered)State and explain three behaviors that should be avoided in a computer laboratory. .
Posted On:Fri 12, March 2021 21:20:23 pm
17. List three factors that might have been considered when setting aside the room for computer laboratory. (Answered)
List three factors that might have been considered when setting aside the room for computer laboratory. .
Posted On:Fri 12, March 2021 21:18:45 pm
List three factors that might have been considered when setting aside the room for computer laboratory. (Answered)List three factors that might have been considered when setting aside the room for computer laboratory. .
Posted On:Fri 12, March 2021 21:18:45 pm
18. List any four differences between the present computers and the pre-electronic age computers. (Answered)
List any four differences between the present computers and the pre-electronic age computers. .
Posted On:Fri 12, March 2021 21:10:30 pm
List any four differences between the present computers and the pre-electronic age computers. (Answered)List any four differences between the present computers and the pre-electronic age computers. .
Posted On:Fri 12, March 2021 21:10:30 pm
19. Describe the process of cold-booting a computer. (Answered)
Describe the process of cold-booting a computer. .
Posted On:Fri 12, March 2021 21:08:25 pm
Describe the process of cold-booting a computer. (Answered)Describe the process of cold-booting a computer. .
Posted On:Fri 12, March 2021 21:08:25 pm
20. Differentiate between job replacement and job displacement and relate to computerization of
organization. (Answered)
Differentiate between job replacement and job displacement and relate to computerization of organization. .
Posted On:Fri 12, March 2021 21:07:27 pm
Differentiate between job replacement and job displacement and relate to computerization of
organization. (Answered)Differentiate between job replacement and job displacement and relate to computerization of organization. .
Posted On:Fri 12, March 2021 21:07:27 pm
21. List three uses of computer in entertainment. (Answered)
List three uses of computer in entertainment. .
Posted On:Fri 12, March 2021 21:06:16 pm
List three uses of computer in entertainment. (Answered)List three uses of computer in entertainment. .
Posted On:Fri 12, March 2021 21:06:16 pm
22. During laboratory preparation of carbon(IV) oxide gas, dilute hydrochloric acid was added
to Substance L in a conical flask.
(a) Identify substance L.
(b) Write an equation that produces carbon(IV) oxide.
(c) State the observations made when the gas produced when bubbled through calcium hydroxide solution for a long time. (Answered)
During laboratory preparation of carbon(IV) oxide gas, dilute hydrochloric acid was added to Substance L in a conical flask. (a) Identify substance L. (b) Write an equation that produces carbon(IV) oxide. (c) State the observations made when the gas produced when bubbled through calcium hydroxide solution for a long time. .
Posted On:Fri 12, March 2021 05:57:10 am
During laboratory preparation of carbon(IV) oxide gas, dilute hydrochloric acid was added
to Substance L in a conical flask.
(a) Identify substance L.
(b) Write an equation that produces carbon(IV) oxide.
(c) State the observations made when the gas produced when bubbled through calcium hydroxide solution for a long time. (Answered)During laboratory preparation of carbon(IV) oxide gas, dilute hydrochloric acid was added to Substance L in a conical flask. (a) Identify substance L. (b) Write an equation that produces carbon(IV) oxide. (c) State the observations made when the gas produced when bubbled through calcium hydroxide solution for a long time. .
Posted On:Fri 12, March 2021 05:57:10 am
23. In Kenya, sodium carbonate is extracted from trona at Lake Magadi.
(i) Give the formula of trona.
(ii) Name the process of extracting sodium carbonate from trona.
(b) The flow chart in Figure 5 summarises the steps involved in the production of sodium carbonate. Use it to answer the questions that follow.
(i) Name the process illustrated in Figure 5.
(ii) Identify the starting raw materials (Answered)
In Kenya, sodium carbonate is extracted from trona at Lake Magadi. (i) Give the formula of trona. (ii) Name the process of extracting sodium carbonate from trona. (b) The flow chart in Figure 5 summarises the steps involved in the production of sodium carbonate. Use it to answer the questions that follow. (i) Name the process illustrated in Figure 5. (ii) Identify the starting raw materials .
Posted On:Fri 12, March 2021 05:51:18 am
In Kenya, sodium carbonate is extracted from trona at Lake Magadi.
(i) Give the formula of trona.
(ii) Name the process of extracting sodium carbonate from trona.
(b) The flow chart in Figure 5 summarises the steps involved in the production of sodium carbonate. Use it to answer the questions that follow.
(i) Name the process illustrated in Figure 5.
(ii) Identify the starting raw materials (Answered)In Kenya, sodium carbonate is extracted from trona at Lake Magadi. (i) Give the formula of trona. (ii) Name the process of extracting sodium carbonate from trona. (b) The flow chart in Figure 5 summarises the steps involved in the production of sodium carbonate. Use it to answer the questions that follow. (i) Name the process illustrated in Figure 5. (ii) Identify the starting raw materials .
Posted On:Fri 12, March 2021 05:51:18 am
24. Study the flow chart in Figure 1 and answer the questions that follow. Gas N forms a while
suspension with aqueous calcium hydroxide.
(a) Name the anion present in the potassium salt.
(b) Write an ionic equation for the formation of solid M.
(c) Give one use of gas N. (Answered)
Study the flow chart in Figure 1 and answer the questions that follow. Gas N forms a while suspension with aqueous calcium hydroxide. (a) Name the anion present in the potassium salt. (b) Write an ionic equation for the formation of solid M. (c) Give one use of gas N. .
Posted On:Fri 12, March 2021 05:33:23 am
Study the flow chart in Figure 1 and answer the questions that follow. Gas N forms a while
suspension with aqueous calcium hydroxide.
(a) Name the anion present in the potassium salt.
(b) Write an ionic equation for the formation of solid M.
(c) Give one use of gas N. (Answered)Study the flow chart in Figure 1 and answer the questions that follow. Gas N forms a while suspension with aqueous calcium hydroxide. (a) Name the anion present in the potassium salt. (b) Write an ionic equation for the formation of solid M. (c) Give one use of gas N. .
Posted On:Fri 12, March 2021 05:33:23 am
25. State a method that can be used to collect dry carbon(IV) oxide gas. Give a reason. (Answered)
State a method that can be used to collect dry carbon(IV) oxide gas. Give a reason. .
Posted On:Fri 12, March 2021 05:27:06 am
State a method that can be used to collect dry carbon(IV) oxide gas. Give a reason. (Answered)State a method that can be used to collect dry carbon(IV) oxide gas. Give a reason. .
Posted On:Fri 12, March 2021 05:27:06 am
26. Explain why it is not advisable to prepare a sample of carbon(IV) oxide using barium carbonate and dilute sulphuric(VI) acid. (Answered)
Explain why it is not advisable to prepare a sample of carbon(IV) oxide using barium carbonate and dilute sulphuric(VI) acid. .
Posted On:Fri 12, March 2021 05:26:17 am
Explain why it is not advisable to prepare a sample of carbon(IV) oxide using barium carbonate and dilute sulphuric(VI) acid. (Answered)Explain why it is not advisable to prepare a sample of carbon(IV) oxide using barium carbonate and dilute sulphuric(VI) acid. .
Posted On:Fri 12, March 2021 05:26:17 am
27. Charcoal is a fuel that is commonly used for cooking. When it burns it forms two
oxides.
(a) Name the two oxides.
(b) State one use of the two oxides. (Answered)
Charcoal is a fuel that is commonly used for cooking. When it burns it forms two oxides. (a) Name the two oxides. (b) State one use of the two oxides. .
Posted On:Fri 12, March 2021 04:58:38 am
Charcoal is a fuel that is commonly used for cooking. When it burns it forms two
oxides.
(a) Name the two oxides.
(b) State one use of the two oxides. (Answered)Charcoal is a fuel that is commonly used for cooking. When it burns it forms two oxides. (a) Name the two oxides. (b) State one use of the two oxides. .
Posted On:Fri 12, March 2021 04:58:38 am
28. The set up below was used to collect a dry sample of a gas.
Give two reasons why the set up cannot be used to collect carbon (IV) oxide gas. (Answered)
The set up below was used to collect a dry sample of a gas. Give two reasons why the set up cannot be used to collect carbon (IV) oxide gas. .
Posted On:Fri 12, March 2021 04:57:13 am
The set up below was used to collect a dry sample of a gas.
Give two reasons why the set up cannot be used to collect carbon (IV) oxide gas. (Answered)The set up below was used to collect a dry sample of a gas. Give two reasons why the set up cannot be used to collect carbon (IV) oxide gas. .
Posted On:Fri 12, March 2021 04:57:13 am
29. What is the role of carbon (IV) oxide in fire extinguishing? (Answered)
What is the role of carbon (IV) oxide in fire extinguishing? .
Posted On:Fri 12, March 2021 04:55:01 am
What is the role of carbon (IV) oxide in fire extinguishing? (Answered)What is the role of carbon (IV) oxide in fire extinguishing? .
Posted On:Fri 12, March 2021 04:55:01 am
30. Describe how carbon (IV) oxide can be distinguished from carbon II oxide using calcium hydroxide solution. (Answered)
Describe how carbon (IV) oxide can be distinguished from carbon II oxide using calcium hydroxide solution. .
Posted On:Fri 12, March 2021 04:54:27 am
Describe how carbon (IV) oxide can be distinguished from carbon II oxide using calcium hydroxide solution. (Answered)Describe how carbon (IV) oxide can be distinguished from carbon II oxide using calcium hydroxide solution. .
Posted On:Fri 12, March 2021 04:54:27 am
31. a) Diamond and graphite are allotropes of carbon. What is meant by an allotrope?
(b) Explain way graphite can be used as a lubricant while diamond cannot. (Answered)
a) Diamond and graphite are allotropes of carbon. What is meant by an allotrope? (b) Explain way graphite can be used as a lubricant while diamond cannot. .
Posted On:Fri 12, March 2021 04:53:02 am
a) Diamond and graphite are allotropes of carbon. What is meant by an allotrope?
(b) Explain way graphite can be used as a lubricant while diamond cannot. (Answered)a) Diamond and graphite are allotropes of carbon. What is meant by an allotrope? (b) Explain way graphite can be used as a lubricant while diamond cannot. .
Posted On:Fri 12, March 2021 04:53:02 am
32. Graphite is one of the allotropes of carbon.
(a) Name one other element which exhibits allotropy.
b) Explain why graphite is used in the making pencil leads. (Answered)
Graphite is one of the allotropes of carbon. (a) Name one other element which exhibits allotropy. b) Explain why graphite is used in the making pencil leads. .
Posted On:Fri 12, March 2021 04:50:31 am
Graphite is one of the allotropes of carbon.
(a) Name one other element which exhibits allotropy.
b) Explain why graphite is used in the making pencil leads. (Answered)Graphite is one of the allotropes of carbon. (a) Name one other element which exhibits allotropy. b) Explain why graphite is used in the making pencil leads. .
Posted On:Fri 12, March 2021 04:50:31 am
33. Carbon (II) oxide is described as a “silent killer”.
(a) State one physical property of carbon (II) oxide that can make it a “silent killer”
(b) State and explain one chemical property that makes carbon (II) oxide poisonous to human beings. (Answered)
Carbon (II) oxide is described as a “silent killer”. (a) State one physical property of carbon (II) oxide that can make it a “silent killer” (b) State and explain one chemical property that makes carbon (II) oxide poisonous to human beings. .
Posted On:Fri 12, March 2021 04:48:37 am
Carbon (II) oxide is described as a “silent killer”.
(a) State one physical property of carbon (II) oxide that can make it a “silent killer”
(b) State and explain one chemical property that makes carbon (II) oxide poisonous to human beings. (Answered)Carbon (II) oxide is described as a “silent killer”. (a) State one physical property of carbon (II) oxide that can make it a “silent killer” (b) State and explain one chemical property that makes carbon (II) oxide poisonous to human beings. .
Posted On:Fri 12, March 2021 04:48:37 am
34. Study the flow chart below and answer the questions that follow.
(a) Give the name of the process that takes place in step I
(b) Give ;
(i) The name of substance G1
(ii) One use of substance F1 (Answered)
Study the flow chart below and answer the questions that follow. (a) Give the name of the process that takes place in step I (b) Give ; (i) The name of substance G1 (ii) One use of substance F1 .
Posted On:Fri 12, March 2021 04:46:29 am
Study the flow chart below and answer the questions that follow.
(a) Give the name of the process that takes place in step I
(b) Give ;
(i) The name of substance G1
(ii) One use of substance F1 (Answered)Study the flow chart below and answer the questions that follow. (a) Give the name of the process that takes place in step I (b) Give ; (i) The name of substance G1 (ii) One use of substance F1 .
Posted On:Fri 12, March 2021 04:46:29 am
35. Carbon exists in different crystalline forms. Some of these forms were recently discovered in soot and are called fullerenes
(i) What name is given to different crystalline forms of the same element?
(ii) Fullerenes dissolve in methylbenzene while the other forms carbon do not. Given that soot is a mixture fullerenes and other solids forms of carbon, describe how crystals of fullerenes can be (Answered)
Carbon exists in different crystalline forms. Some of these forms were recently discovered in soot and are called fullerenes (i) What name is given to different crystalline forms of the same element? (ii) Fullerenes dissolve in methylbenzene while the other forms carbon do not. Given that soot is a mixture fullerenes and other solids forms of carbon, describe how crystals of fullerenes can be .
Posted On:Fri 12, March 2021 04:40:16 am
Carbon exists in different crystalline forms. Some of these forms were recently discovered in soot and are called fullerenes
(i) What name is given to different crystalline forms of the same element?
(ii) Fullerenes dissolve in methylbenzene while the other forms carbon do not. Given that soot is a mixture fullerenes and other solids forms of carbon, describe how crystals of fullerenes can be (Answered)Carbon exists in different crystalline forms. Some of these forms were recently discovered in soot and are called fullerenes (i) What name is given to different crystalline forms of the same element? (ii) Fullerenes dissolve in methylbenzene while the other forms carbon do not. Given that soot is a mixture fullerenes and other solids forms of carbon, describe how crystals of fullerenes can be .
Posted On:Fri 12, March 2021 04:40:16 am
36. Give a reason why ammonia gas is highly soluble in water (Answered)
Give a reason why ammonia gas is highly soluble in water .
Posted On:Fri 12, March 2021 04:37:09 am
Give a reason why ammonia gas is highly soluble in water (Answered)Give a reason why ammonia gas is highly soluble in water .
Posted On:Fri 12, March 2021 04:37:09 am
37. The set-up below was used to collect a dry sample of a gas.
Give two reasons why the set-up cannot be used to collect carbon (IV) oxide gas. (Answered)
The set-up below was used to collect a dry sample of a gas. Give two reasons why the set-up cannot be used to collect carbon (IV) oxide gas. .
Posted On:Fri 12, March 2021 04:34:40 am
The set-up below was used to collect a dry sample of a gas.
Give two reasons why the set-up cannot be used to collect carbon (IV) oxide gas. (Answered)The set-up below was used to collect a dry sample of a gas. Give two reasons why the set-up cannot be used to collect carbon (IV) oxide gas. .
Posted On:Fri 12, March 2021 04:34:40 am
38. The diagram below shows a ‘jiko’ when in use. Study it and answer the questions that follow.
(a) Identify the gas formed at region A
(b) State and explain the observation made at region B. (Answered)
The diagram below shows a ‘jiko’ when in use. Study it and answer the questions that follow. (a) Identify the gas formed at region A (b) State and explain the observation made at region B. .
Posted On:Fri 12, March 2021 04:32:17 am
The diagram below shows a ‘jiko’ when in use. Study it and answer the questions that follow.
(a) Identify the gas formed at region A
(b) State and explain the observation made at region B. (Answered)The diagram below shows a ‘jiko’ when in use. Study it and answer the questions that follow. (a) Identify the gas formed at region A (b) State and explain the observation made at region B. .
Posted On:Fri 12, March 2021 04:32:17 am
39. The diagram below represents part of a set-up used to prepare and collect gas T.
(a) Name two reagents that are reacted to produce both carbon (IV) oxide and carbon (II) oxide.
(b) Write the equation for the reaction which takes place in the wash bottles.
(c) Give a reason why carbon (II) oxide is not easily detected. (Answered)
The diagram below represents part of a set-up used to prepare and collect gas T. (a) Name two reagents that are reacted to produce both carbon (IV) oxide and carbon (II) oxide. (b) Write the equation for the reaction which takes place in the wash bottles. (c) Give a reason why carbon (II) oxide is not easily detected. .
Posted On:Fri 12, March 2021 04:28:38 am
The diagram below represents part of a set-up used to prepare and collect gas T.
(a) Name two reagents that are reacted to produce both carbon (IV) oxide and carbon (II) oxide.
(b) Write the equation for the reaction which takes place in the wash bottles.
(c) Give a reason why carbon (II) oxide is not easily detected. (Answered)The diagram below represents part of a set-up used to prepare and collect gas T. (a) Name two reagents that are reacted to produce both carbon (IV) oxide and carbon (II) oxide. (b) Write the equation for the reaction which takes place in the wash bottles. (c) Give a reason why carbon (II) oxide is not easily detected. .
Posted On:Fri 12, March 2021 04:28:38 am
40. Dry carbon (II) oxide gas reacts with heated lead (II) oxide as shown in the equation below.
#Pb(s) +CO(g)rightarrow Pb(s)+CO_2(g)#
(a) Name the process undergone by lead (II) oxide.
(b) Give a reason for your answer in (a) above.
(c) Name other gas that can be used to perform the same function as carbon
(II) oxide gas in the above reaction. (Answered)
Dry carbon (II) oxide gas reacts with heated lead (II) oxide as shown in the equation below. #Pb(s) +CO(g)rightarrow Pb(s)+CO_2(g)# (a) Name the process undergone by lead (II) oxide. (b) Give a reason for your answer in (a) above. (c) Name other gas that can be used to perform the same function as carbon (II) oxide gas in the above reaction. .
Posted On:Fri 12, March 2021 04:22:17 am
Dry carbon (II) oxide gas reacts with heated lead (II) oxide as shown in the equation below.
#Pb(s) +CO(g)rightarrow Pb(s)+CO_2(g)#
(a) Name the process undergone by lead (II) oxide.
(b) Give a reason for your answer in (a) above.
(c) Name other gas that can be used to perform the same function as carbon
(II) oxide gas in the above reaction. (Answered)Dry carbon (II) oxide gas reacts with heated lead (II) oxide as shown in the equation below. #Pb(s) +CO(g)rightarrow Pb(s)+CO_2(g)# (a) Name the process undergone by lead (II) oxide. (b) Give a reason for your answer in (a) above. (c) Name other gas that can be used to perform the same function as carbon (II) oxide gas in the above reaction. .
Posted On:Fri 12, March 2021 04:22:17 am
41. The set-up below was used to obtain a sample of iron.
Write two equations for the reactions which occur in the combustion tube. (Answered)
The set-up below was used to obtain a sample of iron. Write two equations for the reactions which occur in the combustion tube. .
Posted On:Fri 12, March 2021 04:17:42 am
The set-up below was used to obtain a sample of iron.
Write two equations for the reactions which occur in the combustion tube. (Answered)The set-up below was used to obtain a sample of iron. Write two equations for the reactions which occur in the combustion tube. .
Posted On:Fri 12, March 2021 04:17:42 am
42. In terms of structure and bonding, explain why graphite is used as a lubricant. (Answered)
In terms of structure and bonding, explain why graphite is used as a lubricant. .
Posted On:Thu 11, March 2021 22:09:54 pm
In terms of structure and bonding, explain why graphite is used as a lubricant. (Answered)In terms of structure and bonding, explain why graphite is used as a lubricant. .
Posted On:Thu 11, March 2021 22:09:54 pm
43. a) The set-up below was used to collect gas F, produced by the reaction between water and calcium metal
(i) Name gas F
ii) At the end of the experiment, the solution in the beaker was found to be weak base. Explain why solution was a weak base.
iii) Give one laboratory use of the solution formed in a beaker.
(b) The scheme below shows some reactions starting calcium oxide. Study it and answer ques (Answered)
a) The set-up below was used to collect gas F, produced by the reaction between water and calcium metal (i) Name gas F ii) At the end of the experiment, the solution in the beaker was found to be weak base. Explain why solution was a weak base. iii) Give one laboratory use of the solution formed in a beaker. (b) The scheme below shows some reactions starting calcium oxide. Study it and answer ques .
Posted On:Thu 11, March 2021 21:57:17 pm
a) The set-up below was used to collect gas F, produced by the reaction between water and calcium metal
(i) Name gas F
ii) At the end of the experiment, the solution in the beaker was found to be weak base. Explain why solution was a weak base.
iii) Give one laboratory use of the solution formed in a beaker.
(b) The scheme below shows some reactions starting calcium oxide. Study it and answer ques (Answered)a) The set-up below was used to collect gas F, produced by the reaction between water and calcium metal (i) Name gas F ii) At the end of the experiment, the solution in the beaker was found to be weak base. Explain why solution was a weak base. iii) Give one laboratory use of the solution formed in a beaker. (b) The scheme below shows some reactions starting calcium oxide. Study it and answer ques .
Posted On:Thu 11, March 2021 21:57:17 pm
44. Carbon (II) oxide gas was passed over heated iron (III) oxide as shown in the diagram below.
(a) Give the observation made in tube P.
(b) Write the equation for the reaction which takes place in tube P. (Answered)
Carbon (II) oxide gas was passed over heated iron (III) oxide as shown in the diagram below. (a) Give the observation made in tube P. (b) Write the equation for the reaction which takes place in tube P. .
Posted On:Thu 11, March 2021 21:43:44 pm
Carbon (II) oxide gas was passed over heated iron (III) oxide as shown in the diagram below.
(a) Give the observation made in tube P.
(b) Write the equation for the reaction which takes place in tube P. (Answered)Carbon (II) oxide gas was passed over heated iron (III) oxide as shown in the diagram below. (a) Give the observation made in tube P. (b) Write the equation for the reaction which takes place in tube P. .
Posted On:Thu 11, March 2021 21:43:44 pm
45. Both diamond and graphite have giant atomic structures. Explain why diamond is hard while graphite is soft. (Answered)
Both diamond and graphite have giant atomic structures. Explain why diamond is hard while graphite is soft. .
Posted On:Thu 11, March 2021 21:37:15 pm
Both diamond and graphite have giant atomic structures. Explain why diamond is hard while graphite is soft. (Answered)Both diamond and graphite have giant atomic structures. Explain why diamond is hard while graphite is soft. .
Posted On:Thu 11, March 2021 21:37:15 pm
46. When steam was passed over heated charcoal as shown in the diagram below, hydrogen and carbon (II) oxide gases were formed.
(a) Write an equation for the reaction which took place.
(b) Name two uses of carbon (II) oxide gas which are also uses of hydrogen gas. (Answered)
When steam was passed over heated charcoal as shown in the diagram below, hydrogen and carbon (II) oxide gases were formed. (a) Write an equation for the reaction which took place. (b) Name two uses of carbon (II) oxide gas which are also uses of hydrogen gas. .
Posted On:Thu 11, March 2021 21:35:25 pm
When steam was passed over heated charcoal as shown in the diagram below, hydrogen and carbon (II) oxide gases were formed.
(a) Write an equation for the reaction which took place.
(b) Name two uses of carbon (II) oxide gas which are also uses of hydrogen gas. (Answered)When steam was passed over heated charcoal as shown in the diagram below, hydrogen and carbon (II) oxide gases were formed. (a) Write an equation for the reaction which took place. (b) Name two uses of carbon (II) oxide gas which are also uses of hydrogen gas. .
Posted On:Thu 11, March 2021 21:35:25 pm
47. When carbon (IV) oxide gas was passed through aqueous calcium hydroxide a white suspension was formed.
(a) Write an equation for the reaction that took place.
(b) State and explain the changes that would
occur when carbon (IV) oxide gas is bubbled through the white suspension. (Answered)
When carbon (IV) oxide gas was passed through aqueous calcium hydroxide a white suspension was formed. (a) Write an equation for the reaction that took place. (b) State and explain the changes that would occur when carbon (IV) oxide gas is bubbled through the white suspension. .
Posted On:Thu 11, March 2021 21:30:57 pm
When carbon (IV) oxide gas was passed through aqueous calcium hydroxide a white suspension was formed.
(a) Write an equation for the reaction that took place.
(b) State and explain the changes that would
occur when carbon (IV) oxide gas is bubbled through the white suspension. (Answered)When carbon (IV) oxide gas was passed through aqueous calcium hydroxide a white suspension was formed. (a) Write an equation for the reaction that took place. (b) State and explain the changes that would occur when carbon (IV) oxide gas is bubbled through the white suspension. .
Posted On:Thu 11, March 2021 21:30:57 pm
48. The apparatus shown below was used to investigate the effect of carbon (II) oxide on copper (II) oxide.
(a) State the observation that was made in the combustion tube at the end of the experiment.
(b) Write an equation for the reaction that took place in the combustion tube.
(c) Why is it necessary to burn the gas coming out of tube K? (Answered)
The apparatus shown below was used to investigate the effect of carbon (II) oxide on copper (II) oxide. (a) State the observation that was made in the combustion tube at the end of the experiment. (b) Write an equation for the reaction that took place in the combustion tube. (c) Why is it necessary to burn the gas coming out of tube K? .
Posted On:Thu 11, March 2021 21:24:31 pm
The apparatus shown below was used to investigate the effect of carbon (II) oxide on copper (II) oxide.
(a) State the observation that was made in the combustion tube at the end of the experiment.
(b) Write an equation for the reaction that took place in the combustion tube.
(c) Why is it necessary to burn the gas coming out of tube K? (Answered)The apparatus shown below was used to investigate the effect of carbon (II) oxide on copper (II) oxide. (a) State the observation that was made in the combustion tube at the end of the experiment. (b) Write an equation for the reaction that took place in the combustion tube. (c) Why is it necessary to burn the gas coming out of tube K? .
Posted On:Thu 11, March 2021 21:24:31 pm
49. a)What observation would be made if hydrogen sulphide gas was bubbled through a solution of zinc nitrate?
(b) Write an equation for the reaction that takes place in (a) above. (Answered)
a)What observation would be made if hydrogen sulphide gas was bubbled through a solution of zinc nitrate? (b) Write an equation for the reaction that takes place in (a) above. .
Posted On:Thu 11, March 2021 21:15:06 pm
a)What observation would be made if hydrogen sulphide gas was bubbled through a solution of zinc nitrate?
(b) Write an equation for the reaction that takes place in (a) above. (Answered)a)What observation would be made if hydrogen sulphide gas was bubbled through a solution of zinc nitrate? (b) Write an equation for the reaction that takes place in (a) above. .
Posted On:Thu 11, March 2021 21:15:06 pm
50. Explain why burning magnesium continues to burn in a gas jar containing sulphur (IV) oxide while a burning splint is extinguished. (Answered)
Explain why burning magnesium continues to burn in a gas jar containing sulphur (IV) oxide while a burning splint is extinguished. .
Posted On:Thu 11, March 2021 21:11:33 pm
Explain why burning magnesium continues to burn in a gas jar containing sulphur (IV) oxide while a burning splint is extinguished. (Answered)Explain why burning magnesium continues to burn in a gas jar containing sulphur (IV) oxide while a burning splint is extinguished. .
Posted On:Thu 11, March 2021 21:11:33 pm
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