238. The element which is present in maximum amount in human body is
(a) Carbon
(b) Nitrogen
(c) Phosphorus
(d) Oxygen
239. Which one of the following statements about iron is wrong ?
(a) It is ductile
(b) It is the best conductor of electricity
(c) It can be moulded into different shapes
(d) It is magnetic in character
240.Silver can be changed into thin plates (foils) because it is
(a) Very shiny
(b) Highly ductile
(c) Highly malleable
(d) Of white colour
241. The water vapour that remains suspended in air in winter is called
(a) Fog
(b) Mist
(c) Dew
(d) Smog
242. The part of the cotton-plant from which textile fibre is extracted is the
(a) Root
(b) Cotton-seed
(c) Leaf
(d) Stem
243. Silkworm, the silk insect, eats
(a) Flowers
(b) Mulberry leaves
(c) Barks
(d) spins Roots
244. The liquid from which a spider spins its web is secreted from its
(a) Posterior abdomen glands
(b) Posterior silk gland
(c) Mouth
(d) Salivary glands
245. Fathometer is an instrument used for measuring the
(a) Height of mountains
(b) Depth measuring of sea
(c) Blood pressure
(d) maximum Density of liquids
246. Which one of the following has maximum vitamin C ?
(a) Orange
(b) Apple
(c) Mango
(d) Milk
247. Trinitrotoluene (TNT) is a/an
(a) Fertilizer
(b) Drug
(c) Explosive
(d) Insecticide
248. Which one of the following doesn’t have oxygen?
(a) Cement
(b) Kerosene
(c) Sand
(d) Glass
249. A person stresses the earth least when he is
(a)Lying on the ground
(b) Standing
(c) Sitting
(d)Running
250. Which of the following is not a fossil fuel ?
(a) Natural gas
(b) Charcoal
(c) Petroleum
(d) Coal
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