Ans . B
Q.2 The weight of an object at the poles is greater than at the equator. This is because
(A) Of the shape of the earth
(B) The attraction of the moon is maximum at the earth’s surface
(C) The attraction of the sun is maximum at the earth’s surface
(D) Gravitational pull is more at the poles
Q.3 The first metal used by the man was
Q.4 Gobar gas contains mainly
(A) Carbon dioxide
(D) Carbon monoxide
Q.5 The content of water is greater than fats, the plasma is more than proteins, proteins are more than fats and fats less than plasma. Which constitutes the major Part of the human body ?
Q.6 The water in an open pond remains cool even in hot summer because
(A) Of continuous evaporation of water
(B) Water radiates heat more rapidly than the atmosphere
(C) Water absorbs heat less rapidly than the atmosphere
(D) Water absorbs heat more rapidly than the atmosphere
Q.7 If a large number of people are enclosed in a room, then
(A) Oxygen decreases and carbon dioxide increases
(B) Oxygen increases and carbon dioxide decrease
(C) Both oxygen and carbon dioxide decrease
(D) Both oxygen and carbon dioxide increase
Q.8 It is not advisable to sleep under a tree at night because of the
(A) Release of oxygen in lesser amount
(B) Release of oxygen in larger amount
(C) Release of carbon monoxide
(D) Release of carbon dioxide
Q.9 Which of the following is a balanced fertiliser for plants ?
(B) Ammonia sulphate
Q.10 Which one of the following is a fast growing tree ?
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