In an experiment, carbon (IV) oxide gas was passed over heated charcoal
and the gas produced collected as shown in the diagram below.
i) Write an equation for the reaction that took place in the combustion tube.
(ii) Name another substance that can be used instead of sodium hydroxide.
(iii) Describe a simple chemical test that can be used to distinguish
between carbon (IV) oxide and carbon (II) (Answered)
The following diagrams shows the structures of two allotropes of carbon. Study them and answer the questions that follow.
(i) Name the allotrope M and N
ii) Give one use of N
(iii) Which allotrope conducts electricity? Explain. (Answered)
State and explain the function of tartaric acid in baking powder. (Answered)
Explain why it is not advisable to leave jiko with burning charcoal in a closed room where one is sleeping. (Answered)
Study the information in the table below and answer the questions that follow.
(The letters do not represent the actual symbols of the elements)
Selects an element which:
(a) Is likely to be in group II of the periodic table
(b) Could be used to make electric cables.
(c) Is likely to be graphite (Answered)
The simplified flow chart shows some of the steps in the manufacture of sodium carbonate by Solvay process.
(a) Identify substance L
(b) Name the process taking place in step II
(c) Write an equation for the reaction which takes place in step III. (Answered)
When excess carbon (II) oxide gas was passed over heated lead (II) oxide in a combustion tube, lead (II) oxide was reduced.
(a) Write an equation for the reaction, which took place.
(b) What observation was made in the combustion tube when the reaction was complete?
(c) Name other gas which could be used to reduce lead (II) oxide.
(Answered)
The diagram below represents a charcoal burner. Study it and answer the question that follows:
Write equations for the reactions taking place at I and I. (Answered)
When extinguishing a fire caused by burning kerosene, carbon (IV) oxide is used in preference to water. Explain. (Answered)
Write an equation for the reaction that takes place when carbon (II) oxide gas is passed over heated Lead (II) oxide. (Answered)
Give a reason why calcium hydroxide solution is used to detect the presence of carbon (IV) oxide gas while sodium hydroxide is not (Answered)
Indicate the best type of document to use in the following situations
a)Issued by a transport trader without his own transport means
b)To correct overcharge in the invoice
c)Written by a debtor to the seller acknowledging that a debt exists
d)Written by an exporter to his bank authorizing the bank to sell goods that the importer is unable to pay for. (Answered)
State four internal diseconomies of scale (Answered)
Outline four factors that hinder development in most African countries (Answered)
State four circumstances when face to face communication may be appropriate (Answered)
State four factors that influence the amount of capital borrowed by a business enterprise (Answered)
Highlight four factors that account for wage differences among workers with similar qualifications. (Answered)
Identify four possible causes of structural unemployment (Answered)
Highlight four features of postal orders (Answered)
State four positive effects of inflation (Answered)
The central bank is a banker to the government. Outline four banking services it provides to the Kenyan government (Answered)
Highlight four ways that could be used to determine the prices of goods and services (Answered)
Outline four circumstances under which the nature of goods would influence the choice of means of transport (Answered)
Highlight four modern trends in product promotion (Answered)
Highlight four factors that may determine the amount of premium to be paid in life assurance. (Answered)
State four advantages of specialization and division of labour (Answered)
Outline four contents of goods business plan. (Answered)
State four reasons why it is important to locate a warehouse to a point of entry into a country (Answered)
Outline four characteristics of debentures as a source of finance for a company (Answered)
Many trading blokcs particularly in Africa face numerous challenges. Outline four challenges they face. (Answered)
Highlight four advantages of direct taxation. (Answered)
Mention four factors that have led to slow economic development in most African countries (Answered)
State four negative effects of inflation to business (Answered)
Highlight four factors that influence the amount of money collected by the government through taxation (Answered)
Outline four measures that central bank of Kenya can use to mop out any excess liquidity in the country (Answered)
Classify each of the assets below as either current or fixed (Answered)
Outline four ways in which students can prevent unemployment in the future after high school (Answered)
Outline four disadvantages of under populated country (Answered)
Indicate whether each of the following below is either an Income approach,Expenditure approach or Output approach in the measurement of national income.
a)Expenditure on fuel
b)Government tax
c)Cost on finished goods
d)Salaries and wages (Answered)
State four expenses that a wholesaler will incur if he distributes goods on behalf of the producer (Answered)
Mention four government policies that may encourage location of firms in a certain area. (Answered)
Highlight four ways that a government can use to increase the demand of a commodity in the market (Answered)
Mutua and Mutio have taken life assurance policies. State four factors that would make them pay different premium amounts. (Answered)
State four functions carried out in a warehouse (Answered)
Give four merits of verbal communication over written communication (Answered)
State four characteristics of an efficient transport system. (Answered)
Highlight four internal sources of capital available to a business (Answered)
Give four main differences between a private limited company and a public limited company (Answered)
Highlight four reasons why most businesses in Kenya operate on small scale basis (Answered)
Outline four circumstances that will make the consumers to buy products directly from producers (Answered)