RRB Junior Engineer (JE) Sample Paper: General Science-23

1. Iodized salt is beneficial for

(a) lowering of blood pressure
(b) prevention of dehydration
(c) thyroid function
(d) salivary glands

2. The acid rain destroys vegetations because it contains

(a) nitric acid
(b) ozone
(c) carbon monoxide
(d) sulphuric acid

3. Diamonds are glittering and attractive because light Incident on them undergoes

(a) highest refraction
(b) multiple internal reflections
(c) multiple surface reflections
(d) hundred percent transmission

4. The substance most commonly used as a food preservative is

(a) sodium carbonate
(b) tartaric acid
(c) acetic acid
(d) sodium salt of benzoic acid

5. Catalyst is a substance which

(a) increases the rate of the reaction
(b) decreases the rate of reaction
(c) has no action on the rate of the reaction
(d) None of these

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Study Kit for RRB Junior Engineer EXAM (Phase-1) 

1(b), 2(d), 3(c), 4(c), 5(a)