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