SECTION: SCIENCE
31. The deficiency of vitamin D causes
(A) Night blindness
(B) Scurvy
(C) Rickets
(D) Anaemia
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32. The green plants can make their own food in the presence of
(A) Carbohydrates
(B) Carbon dioxide
(C) Chlorophyll
(D) Nitrogen
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33. Water is a compound made of
(A) Carbon and Oxygen
(B) Hydrogen and Oxygen
(C) Nitrogen and Oxygen
(D) Sulphur and Oxygen
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34. Mixture of salt and water is called
(A) Solvent
(B) Solute
(C) Solution
(D) Evaporation
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35. As we go upward, the density of the air
(A) Decreases
(B) Increases
(C) Remain as it is
(D) None of these
Answer:
Explanation: