Post Utme Chemistry Past Questions and Answers

Question 256:

Calculate the mass of \(1.12\) \(\mathrm{dm}^{3}\) of chlorine gas.

A. \(3.55 \mathrm{~g}\)
B. \(35.5 \mathrm{~g}\)
C. \(4.5 \mathrm{~g}\)
D. \(1.78 \mathrm{~g}\)

Question 257:

The sulphide which is insoluble in dilute hydrochloric acid is ____________

A. \(\mathrm{ZnS}\)
b. Na2S
B. FeS
C. CuS

Question 258:

What is the \(\mathrm{pH}\) of a \(0.001 \mathrm{~mol}\) \(\mathrm{dm}^{3}\) solution of sodium hydroxide?

A. 14
B. 13
C. 12
D. 11

Question 259:

The type of isomerism shown by cis- and trans-isomers is ____________

A. Optical isomerism
B. Positional isomerism
C. Functional isomerism
D. Geometrical isomerism

Question 260:

Which of the following statements is true about 2methyipropane and butane?

A. They have the same boiling points
B. They have different number of carbon atoms
C. They have the same chemical properties
D. They are members of the same homologous series