Selected MCQ

Current Question
Which reaction is first order?
  • A. Rate independent of concentration
  • B. Rate proportional to concentration
  • C. Rate proportional to square of concentration
  • D. Rate constant zero
Correct Answer: B
Explanation:
First order depends linearly on reactant concentration.
Related Question 1
For a first-order reaction, the half-life is:
  • A. Dependent on initial concentration
  • B. Independent of initial concentration
  • C. Zero-order only
  • D. Proportional to activation energy only
Correct Answer: B
Explanation:
First-order half-life is constant for a given rate constant.
Related Question 2
Which reaction forms ester?
  • A. Hydrolysis
  • B. Esterification
  • C. Oxidation
  • D. Reduction
Correct Answer: B
Explanation:
Acid + alcohol forms ester.
Related Question 3
Which reaction releases electrons?
  • A. Reduction
  • B. Oxidation
  • C. Neutralization
  • D. Precipitation
Correct Answer: B
Explanation:
Oxidation is loss of electrons.
Related Question 4
Which reaction produces polymer?
  • A. Hydrolysis
  • B. Polymerization
  • C. Oxidation
  • D. Reduction
Correct Answer: B
Explanation:
Polymerization links monomers.
Related Question 5
Which state of matter has long-range order but flows?
  • A. Solid
  • B. Liquid crystal
  • C. Gas
  • D. Plasma
Correct Answer: B
Explanation:
Liquid crystals combine order and fluidity.