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Chemistry Past Questions and Answers

Waec Chemistry Questions

Question 6:

Equilibrium is said to be attained in reversible reaction when

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A All the reactants have been used up
B All the products have been formed
C There is no further change in temperature
D The rates of the forward and backward reactions are equal
E The rate of formation of the products decreases with time

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Question 7:

An acid present in proteins is

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A Lactic acid
B Amino acid
C Propanoic acid
D Palmitic acid
E Stearic acid

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Question 8:

The following are uses of sulphur except

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A Manufacture of tetraoxosulphate (VI) acid
B Prevention of the growth of fungi
C Vulcanization rubber
D Manufacture of dyes
E Coating of steel to prevent rusting

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Question 9:

The reaction represented by the equation NaOH_(aq) + HCI_(aq) â†’ NaCI_(aq) + H₂O_(/)

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A Is a double decomposition
B Is a neutralization
C Is reversible
D Is usually catalysed
E Attains equilibrium after a few seconds

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Question 10:

Which of the following compound is aromatic?

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A Benzene
B Cyclobutane
C Cyclopentane
D Hexane
E Ethene

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