Waec Chemistry 2017 Past Questions and Answers

Question 41:

• WAEC 2017

Which of the following factors characterize members of the same homologous series?

A. The chemical property change gradually throughout the series
B. Physical properties of members are similar
C. They have the same molecular formular
D. Successive members undergo changes in molecular formula by \(CH_{2}\)

Question 42:

• WAEC 2017

Calculate the mass of copper deposited if a current of 0.45A flows through \(CuSO_{4}\) solution for 1hour 15mins. [Cu=64.0, S= 32.0, O =16.0, 1F= 96500C]

A. 6.40g
B. 0.67g
C. 0.64g
D. 0.45g

Question 43:

• WAEC 2017

Classification of alkanols is based on the

A. Number of carbon atoms present in the compound
B. Molecular mass of the compound
C. Molecular formula of the compound
D. Number of alkyl groups bonded to the carbon having the hydroxyl group

Question 44:

• WAEC 2017

The name of the compound \(C_{4}H_{9}COOC_{3}H_{7}\) is

A. Propyl pentanoate
B. Pentyl propanoate
C. Butyl propanoate
D. Propyl butanoate

Question 45:

• WAEC 2017

Which of the following pairs of gases are pollutants from car exhaust?

A. Nitrogen(II) oxide and Carbon(IV) oxide
B. Carbon(IV) oxide and Nitrogen
C. Carbon(II) oxide and Sulphur(IV) oxide
D. Carbon(II) oxide and oxygen