RRB Junior Engineer (JE) Sample Paper: General Science-38

1. The most abundant element in the human body is

(a) carbon
(b) iron
(c) nitrogen
(d) oxygen

2. Which of the following is riot a greenhouse gas ?

(a) Hydrogen
(b) Carbon dioxide
(c) Nitric oxide
(d) Chlorofluorocarbon

3. Wax used for making candle is chemically a mixture of

(a) aliphatic hydrocarbons
(b) aromatic hydrocarbons
(c) cyclic hydrocarbons
(d) aliphatic and aromatic hydrocarbons

4. Litmus is obtained from

(a) a bacterium
(b) a fungus
(c) an algae
(d) lichen

5. Vinegar made by fermentation from cane sugar contains

(a) palmitic acid
(b) lactic acid
(c) citric acid
(d) acetic acid

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

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