Everyday Science Multiple Choice Questions
62) In blood, the percentage of water is
(a) 75%
(b) 85%
(c) 90%
(d) 95%
64) Water is a universal solvent for what reactions.
(a) Physical
(b) Chemical
(c) Nuclear
(d) Biochemical
66) Nitrogen occur in plants and animals in the form of
(a) Minerals
(b) Fats
(c) Carbohydrates
(d) Proteins
68) The gases which are used by divers as an artificial atmosphere are helium and
(a) Nitrogen
(b) Oxygen
(c) Neon
(d) Carbon monoxide




70) Which of the following is involved in blood clotting.
(a) Sodium
(b) Magnesium
(c) Calcium
(d) Potassium






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