General Science – Exercise – 1

36. Non stick cooking utensils are coated with

(a) Teflon
(b) PVC
(c) black paint
(d) polystyrene

Answer
Answer : (a)
Explanation
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37. Permanent hardness of water can be removed by adding

(a) chlorine
(b) washing soda
(c) potassium permanganate
(d) bleaching powder

Answer
Answer : (b)
Explanation
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38. One fathom is equal to

(a) 6 feet
(b) 6 meters
(c) 60 feet
(d) 100 cm

Answer
Answer : (a)
Explanation
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39. In an atomic explosion, enormous energy is released which is due to

(a) conversion of chemical energy into heat energy
(b) conversion of mechanical energy into nuclear energy
(c) conversion of mass into energy
(d) conversion of neutrons into protons

Answer
Answer : (c)
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40. Which among the following is a positively charged particle emitted by a radioactive element?

(a) Beta ray
(b) Alpha ray
(c) Cathode ray
(d) Gamma ray

Answer
Answer : (b)
Explanation
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