Post Utme Chemistry Past Questions and Answers

Question 411:

Vulcanization involves the removal of ____________

A. A monomer
B. The single bond
C. The double bond
D. A polymer

Question 412:

Phenolphthalein in acidic solution is ____________

A. Red
B. Orange
C. Colourless
D. Yellow

Question 413:

When iron is exposed to moisture and it rusts, the value of \(\Delta G\) for the reaction is ____________

A. Neutral
B. Zero
C. Positive
D. Negative

Question 414:

A substance that is used as a ripening agent for fruits is ____________

A. Ethane
B. Propane
C. Methane
D. Butane

Question 415:

The shape of the hydrocarbon compound \(\mathrm{CH}_{4}\) is ____________

A. Square planar
B. Planar
C. Linear
D. Tetrahedral