31. Which of the following helps in the clotting of blood.?
A. Vitamin b
B. Vitamin c
C. Vitamin d
D. Vitamin k
32. Which vitamin is provided by the sunlight to the human body.?
A. A
B. B
C. C
D. D
33. Which of the following is caused by a vitamin a deficiency.?
A. Edema
B. Anemia
C. Night blindness
D. Rickets
34. Which vitamin deficiency leads to scurvy.?
A. Vitamin b
B. Vitamin k
C. Vitamin c
D. Vitamin e
35. Which of the following chemicals is used for fruit ripening.?
A. Calcium carbide
B. Sodium chloride
C. Potassium chloride
D. None of these
36. Marsh gas mainly contains.?
A. C2h2
B. Co
C. Ch4
D. H2s
37. Carbon occurs in nature in the purest from as.?
A. Graphite
B. Carbon black
C. Diamond
D. Coal
38. What is the air.?
A. Element
B. Compound
C. Mixture
D. Colloid
39. First organic chemical to be synthesized in laboratory.?
A. Phosphoric acid
B. Oxalic acid
C. Citric acid
D. Urea
40. The most abundant element in the earth’s crust is.?
A. Oxygen
B. Silicon
C. Aluminum
D. NitrogenEveryday Science MCQs Previous Page [ 21 To 30 ]
