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 ]
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