General Knowledge (Science) Questions and Answer

1. Blood is purified by

A. Kidneys
B. Spleen
C. Pancreas
D. Liver

Answer
A. Kidneys 

2. Why is ozone layer important to mankind ?

A. It creates a protective covering against ultraviolet rays
B. It maintains the temperature of Earth
C. It releases hydrogen in the atmosphere
D. It releases oxygen in the atmosphere

Answer
A. It creates a protective covering against ultraviolet rays 

3. Which of the two metals are mixed in manufacturing of stainless steel ?

A. Zinc, Chromium
B. Chromium, Nickel
C. Chromium, Iron
D. Nickel, Iron

Answer
C. Chromium, Iron 

4. Permanent hardness of water cannot be removed by

A. Boiling
B. Adding Sodium Carbonate
C. Distillation
D. Adding Chlorine 

Answer
A. Boiling 

5. During photosynthesis in plants, the gas evolved is

A. Carbon dioxide
B. Oxygen
C. Nitrogen
D. Hydrogen

Answer
B. Oxygen 

6. Liver secretes

A. Saliva
B. Sebum
C. Bile
D. Acid

Answer
C. Bile 

7. Which of the following is not a recognised blood group ?

A. A
B. B
C. BC
D. AB

Answer
C. BC 

8. The vitamin which can be most easily synthesised in human body is

A. Vitamin D
B. Vitamin C
C. Vitamin B
D. Vitamin K

Answer
A. Vitamin D 

9. How does Vitamin D help in growing children ?

A. It increases height and weight
B. It improves eye sight and memory
C. It strengthens bones and teeth
D. It provides movement to limbs

Answer
C. It strengthens bones and teeth 

10. The average temperature of human body is

A. 30.50F
B. 36.90F
C. 98.60F
D. 97.40F

Answer
C. 98.60F