Class 12th Chemistry Objective Question And Answer

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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

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

• one
• two
• three
• Four

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

• one
• Two
• Three
• Four

4. Graphite is an example of

• Ionic Solid
• Molecular Solid
• Covalent Solid
• Metallic Solid

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

• 1
• 2
• 3
• 4

6. The molecularity of a reaction cannot be :

• Zero
• One
• Two
• Three

7. Cuprite is an ore of :

• Zn
• Cu
• Ag
• Fe

8. Calamine is an ore of :

• Cu
• Fe
• Al
• Zn

9. Bauxite is an ore of :

• Al
• Fe
• Cu
• Zn

10. Sulfide ores are generally concentrated by :

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

11. Haematite is an ore of :

• Al
• Fe
• Cu
• Zn

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

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

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

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

• Methylamine
• Ethylamine
• Ethane
• Acetamide

16. Aldehyde and ketone can be distinguished by :

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

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

• HBr
• HI
• HF
• HCI

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

• Aspartame
• Seconal
• Aspirin
• Sodium benzoate

19. Acid chloride is reduced to the aldehyde by :

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

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

21. Phenol is less acidic than:

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

22. The hybridization of Xe F2 Is :

• sp³d²
• sp³d
• sp³
• sp³d³

23. The hybridization of Xe F4 Is :

sp³d²

s³d
sp³
sp³d³

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

• Nail
• DNA
• Hair
• Wool

25. Enzymes are:

• Carbohydrates
• Vitamins
• Proteins
• None of these

26. Vitamin A is Called

• Retinol
• Ascorbic acid
• calciferol
• Tocopherol

27. which of the following is not found in RNA

• Uracil
• Adenine
• Ammonium Acetate
• Guanine

28. PVC is a

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

29. Phenol is used as :

• Antiseptic
• Disinfectants
• Both a & b
• None

30. Antipyretics is a :

• Quinone
• Paracetamol
• Luminal
• None

👉 12th Chemistry Objective Questions And Answers – PDF Download

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