CBSE Class 12 Chemistry — MCQs

Multiple choice questions from all previous year papers.

12 questions found

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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· $Basicity of aromatic amines (pKb)$