Post Utme Chemistry Past Questions and Answers

Question 276:

Which of the following is used to hasten the ripening of fruits?

A. Ethanol
B. Ethene
C. Ethyne
D. Ethane

Question 277:

The products of the combustion ____________
of candle wax are

A. Hydrogen and water
B. Oxygen and water
C. Carbon(IV) oxide and water
D. Carbon(II)oxide and water

Question 278:

In the electrolytic extraction of aluminium the function of the molten cryolite to ____________

A. Precipitate
aluminium hydroxide
B. Lower the melting point of aluminium oxide.
C. Act as raw material.
D. Act as a solvent

Question 279:

A suitable solvent for iodine and naphthalene is ____________

A. Benzene
B. Ethanol
C. Water
D. Carbon(IV) sulphide

Question 280:

What is the IUPAC name of the
[image]

A. 1-chloro-3-ethylperit-3-ene
B. 5-chloro-3-ethylpent-2,3-ene
C. 5-chloro-3-ethylpent-2-ene
D. 1-ethyl-l-chlorbethylpropene