Here Are 50 Multiple-Choice Questions (Mcqs) For
Class 12
CHEMISTRY
Indian Syllabus 2023
**1. Which of the following elements belongs to Group 18 of the periodic table?
**
a) Sodium
b) Neon
c) Calcium
d) Chlorine
**Answer: b) Neon**
**2. What is the chemical formula for common salt?**
a) Na2SO4
b) H2O
c) NaCl
d) CO2
**Answer: c) NaCl**
**3. Which gas is responsible for the greenhouse effect?**
a) Oxygen
, b) Nitrogen
c) Carbon dioxide
d) Hydrogen
**Answer: c) Carbon dioxide**
**4. What is the pH of a neutral solution?**
a) 7
b) 1
c) 14
d) 0
**Answer: a) 7**
**5. The process of conversion of a solid directly into vapor is called:**
a) Sublimation
b) Melting
c) Evaporation
d) Condensation
**Answer: a) Sublimation**
**6. Which of the following is an example of an exothermic reaction?**
a) Photosynthesis
b) Respiration
, c) Combustion
d) Electrolysis
**Answer: c) Combustion**
**7. Which gas is produced during the electrolysis of water?**
a) Oxygen
b) Nitrogen
c) Hydrogen
d) Carbon dioxide
**Answer: c) Hydrogen**
**8. The SI unit of electric current is:**
a) Watt
b) Ampere
c) Joule
d) Volt
**Answer: b) Ampere**
**9. Which of the following is a transition metal?**
a) Sodium
b) Zinc
c) Calcium
Class 12
CHEMISTRY
Indian Syllabus 2023
**1. Which of the following elements belongs to Group 18 of the periodic table?
**
a) Sodium
b) Neon
c) Calcium
d) Chlorine
**Answer: b) Neon**
**2. What is the chemical formula for common salt?**
a) Na2SO4
b) H2O
c) NaCl
d) CO2
**Answer: c) NaCl**
**3. Which gas is responsible for the greenhouse effect?**
a) Oxygen
, b) Nitrogen
c) Carbon dioxide
d) Hydrogen
**Answer: c) Carbon dioxide**
**4. What is the pH of a neutral solution?**
a) 7
b) 1
c) 14
d) 0
**Answer: a) 7**
**5. The process of conversion of a solid directly into vapor is called:**
a) Sublimation
b) Melting
c) Evaporation
d) Condensation
**Answer: a) Sublimation**
**6. Which of the following is an example of an exothermic reaction?**
a) Photosynthesis
b) Respiration
, c) Combustion
d) Electrolysis
**Answer: c) Combustion**
**7. Which gas is produced during the electrolysis of water?**
a) Oxygen
b) Nitrogen
c) Hydrogen
d) Carbon dioxide
**Answer: c) Hydrogen**
**8. The SI unit of electric current is:**
a) Watt
b) Ampere
c) Joule
d) Volt
**Answer: b) Ampere**
**9. Which of the following is a transition metal?**
a) Sodium
b) Zinc
c) Calcium
