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Chemistry Past Questions and Answers

Neco Chemistry Questions

Question 96:
Chromatography is used to separate components of mixtures which differ in their rates of ____________
  • A Diffusion
  • B Migration
  • C Reaction
  • D Sedimentation
  • E Sublimation.
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Question 97:
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 \( 0 \)
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Question 98:
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
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Question 99:
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.
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Question 100:
What is the maximum number of electrons that an f-orbital can accommodate?
  • A 2
  • B 6
  • C 7
  • D 10
  • E 14
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