Class 12th Chemistry Objective Question And Answer

12th Chemistry Objective Questions And Answers PDF

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Class 12th Chemistry Objective Questions and Answers | Chemistry MCQ questions and answers | Chemistry objective question for class 12 |12th Chemistry Objective Questions | 12th board VVI question 2021-22.

Class 12th Chemistry Objective Question And Answer

1. The number of particles in a simple cubic per unit cell is :

  • One
  • two
  • three
  • four
View Answer
One

2. The number of particles in a face-centered cubic (fcc) per unit cell is

  • one
  • two
  • three
  • Four
View Answer
Four

3. The number of particles in a body-centered cubic (bcc) per unit cell IS :

  • one
  • Two
  • Three
  • Four
View Answer
Tw0

4. Graphite is an example of

  • Ionic Solid
  • Molecular Solid
  • Covalent Solid
  • Metallic Solid
View Answer
Covalent Solid

5. Possible Co-ordination number of Cation of tetrahedral structural Arrangement is:

  • 1
  • 2
  • 3
  • 4
View Answer
4

6. The molecularity of a reaction cannot be :

  • Zero
  • One
  • Two
  • Three
View Answer
Zero

7. Cuprite is an ore of :

  • Zn
  • Cu
  • Ag
  • Fe
View Answer
Cu

8. Calamine is an ore of :

  • Cu
  • Fe
  • Al
  • Zn
View Answer
Zn

9. Bauxite is an ore of :

  • Al
  • Fe
  • Cu
  • Zn
View Answer
Al

10. Sulfide ores are generally concentrated by :

  • Gravity separation method
  • Magnetic separation method
  • Froth floatation process
  • None of these
View Answer
Froth floatation process

11. Haematite is an ore of :

  • Al
  • Fe
  • Cu
  • Zn
View Answer
Fe

12. Unit Of rate constant for Second-order reaction, K is :

  • s⁻¹
  • mol⁻¹ L s⁻¹
  • mol⁻² L² s⁻¹
  • mol L⁻¹ s⁻¹
View Answer
mol⁻¹ L s⁻¹

13. Unit Of rate constant for First-order reaction, K is :

  • s⁻¹
  • mol⁻¹ L s⁻¹
  • mol⁻² L² s⁻¹
  • mol L⁻¹ s⁻¹
View Answer
s⁻¹

14. Unit Of rate constant for the third-order reaction, K is :

  • s⁻¹
  • mol⁻¹ L s⁻¹
  • mol⁻² L² s⁻¹
  • mol L⁻¹ s⁻¹
View Answer
mol⁻² L² s⁻¹

15. When nitroethane is treated with Li Al H4 the product formed is :

  • Methylamine
  • Ethylamine
  • Ethane
  • Acetamide
View Answer
Ethylamine

16. Aldehyde and ketone can be distinguished by :

  • Tollen’s reagent
  • LiAIH4
  • HCN
  • None of these
View Answer
Tollen’s reagent

17. Among the halogen acids the one which is weakest is :

  • HBr
  • HI
  • HF
  • HCI
View Answer
HF

18. Which of the following is an artificial sweetening agent :

  • Aspartame
  • Seconal
  • Aspirin
  • Sodium benzoate
View Answer
Aspartame

19. Acid chloride is reduced to the aldehyde by :

  • Wurtz reaction
  • Fitting reaction
  • Rosenmund reduction
  • None of these
View Answer
Rosenmund reduction

20. Tollen’s reagent is:

  • A mixture of CuSO4 and NaOH
  • A solution of copper sulfate, sodium citrate, and sodium carbonate
  • Ammonical silver nitrate solution
  • None of these
View Answer
A solution of copper sulphate, sodium citrate and sodium carbonate

21. Phenol is less acidic than:

  • Ethanol
  • Methanol
  • p-Nitrophenol
  • p- methyl phenol
View Answer
p-Nitrophenol

22. The hybridization of Xe F2 Is :

  • sp³d²
  • sp³d
  • sp³
  • sp³d³
View Answer
sp³d

23. The hybridization of Xe F4 Is :

sp³d²

s³d
sp³
sp³d³

View Answer
sp³d²

24. Which one of the following is not a protein:

  • Nail
  • DNA
  • Hair
  • Wool
View Answer
DNA

25. Enzymes are:

  • Carbohydrates
  • Vitamins
  • Proteins
  • None of these
View Answer
Proteins

26. Vitamin A is Called

  • Retinol
  • Ascorbic acid
  • calciferol
  • Tocopherol
View Answer
Retinol

27. which of the following is not found in RNA

  • Uracil
  • Adenine
  • Ammonium Acetate
  • Guanine
View Answer
Ammonium Acetate

28. PVC is a

  • Addition polymer
  • Condensation polymer
  • copolymer
  • None of these
View Answer
Addition polymer

29. Phenol is used as :

  • Antiseptic
  • Disinfectants
  • Both a & b
  • None
View Answer
Both a & b

30. Antipyretics is a :

  • Quinone
  • Paracetamol
  • Luminal
  • None
View Answer
Paracetamol

👉 12th Chemistry Objective Questions And Answers – PDF Download

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