1261. Which of the following helps in the clotting of blood ?

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

1262. Which Vitamins is provided by the sunlight to human body ?

A. C
B. D *
C. B
D. A

1263. Which of the following is caused by a Vitamin A deficiency ?

A. Edema
B. Anemia
C. Night Blindness *
D. Rickets

1264. Which vitamin deficiency leads to scurvy ?

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

1265. Which of the following chemicals is used for fruit ripening?

A. Calcium Carbide *
B. Sodium Chloride
C. Potassium Chloride
D. None of the above

1266. Marsh gas mainly contains :

A. C2H2
C. CH4 *
D. H2S

1267. Carbon occurs in nature in the purest form as :

A. Diamond *
B. Graphite
C. Carbon Black
D. Coal

1268. What is the Air ?

A. Element
B. Compound
C. Mixture *
D. Colloid

1269. First organic chemical to be synthesized in laboratory :

A. Phosphoric acid
B. Oxalic acid
C. Urea *
D. Citric Acid

1270. The most abundant element in the earth’s crust is :

A. Silicon
B. Aluminium
C. Nitrogen
D. Oxygen *