Post Utme Chemistry Past Questions and Answers

Question 381:

Zinc displaces copper from an aqueous solution of copper (II) salt because ____________

A. Copper is a transition element.
B. Copper is moderately reactive metal
C. Zinc and copper have reducing properties.
D. Zinc is more reactive than copper.

Question 382:

The components of universal indicator solution can best be separated by ____________

A. Evaporation.
B. Chromotography
C. Crystalization.
D. Fractional distillation.

Question 383:

When naphthalene on heating changes from the solid state directly to the gaseous state, it undergoes ____________

A. Evaporation
B. Sublimation
C. Decomposition
D. Ionisation

Question 384:

How many faradays of electricity are required to liberate 9 g of aluminium?

A. 0.1
B. 0.3
C. 1.0
D. 3.0

Question 385:

An arrangement of two different metals in aqueous solutions of their salts to produce an electric current is known as ____________

A. Electrochemical cell
B. Activity series
C. Thermocouple
D. Voltamete