CBSE Class 12 Chemistry — MCQs
Multiple choice questions from all previous year papers.
12 questions found
2026(12 questions)
- 6
Aspirin is obtained by acetylation of
1 mark· A· Preparation of aspirin by acetylation - 8
At low temperature, phenol reacts with dil. HNO₃ to yield
1 mark· A· Nitration of phenol - 9
Which of the following is 'not' true about enantiomers?
1 mark· A· Properties of enantiomers - 10
Aniline on direct nitration yields
1 mark· A· Direct nitration of aniline - 12
The deficiency of which of the following vitamins causes increased fragility of red blood cells and muscular weakness:
1 mark· A· Vitamin deficiency diseases - 1
Which of the following curve represents the first order reaction?
1 mark· A· Half-life of first order reactions - 2
Which of the following solutions will have the lowest freezing point in water?
1 mark· A· Depression in freezing point and van't Hoff factor - 3
Which of the following is not a transition metal?
1 mark· A· Definition of transition metals - 4
Which of the following represents the fraction of molecules with energies equal to or greater than Eₐ?
1 mark· A· Arrhenius equation and activation energy - 5
What will happen during the electrolysis of aqueous solution of CuCl₂ by using platinum electrodes?
1 mark· A· Electrolysis of aqueous CuCl₂ - 7
The secondary valency of Co in the complex [Co(NH₃)₅(NO₂)]²⁺ is
1 mark· A· Secondary valency (coordination number) - 11
Which of the following amines has lowest pKb value?
1 mark· A· Basicity of aromatic amines (pKb)