Neco Chemistry Past Questions and Answers

Question 96:

• NECO 2008

Chromatography is used to separate components of mixtures which differ in their rates of ____________

A. Diffusion
B. Migration
C. Reaction
D. Sedimentation
E. Sublimation.

Question 97:

• NECO 2008

The electrode potential in volts of 2H+(aq) / H2(q) system is ____________

A. -2.87
B. -2.71
C. 0.8
D. 1.68
E. \( 0 \)

Question 98:

• NECO 2008

A substance is said to be hygroscopic when it ____________

A. Absorbs atmospheric moisture and then goes into solution
B. Absorbs atmospheric moisture but does not go into solution
C. Changes colour
D. Is not affected by atmospheric moisture
E. Losses its water of crystallization

Question 99:

• NECO 2008

A measure of the degree of disorderliness in a chemical system is known as the ____________

A. Activation energy
B. Enthalpy
C. Entropy
D. Equilibrium
E. Free energy.

Question 100:

• NECO 2008

What is the maximum number of electrons that an f-orbital can accommodate?

A. 2
B. 6
C. 7
D. 10
E. 14