311: A state in India has the following characteristics:
1. Its northern part is arid and semi arid.
2. Its central part produces cotton.
3. Cultivation of cash crops is predominant over food crops.
Which one of the following states has all of the above characteristics ?
(a) Tamil Nadu
(b) Gujarat
(c) Andhra Pradesh
(d) Karnataka
312: During a thunderstorm, the thunder in the skies is produced by the
1. meeting of cumulonimbus clouds in the sky
2. lightning that separates the nimbus clouds
3. violent upward movement of air and water particles
Select the correct answer using the codes given below.
(a) 1 only
(b) 2 and 3
(C) 1 and 3
(d) None of the above produces the thunder
313: Main constituents of Biogas are:
(a) Methane and Carbon dioxide
(b) Ethylene and Carbon dioxide
(c) Butane and Carbon monoxide
(d) Methane and Carbon monoxide
314: A girl is swinging on a swing in sitting position. When the same girl stands up, the period of swing will
(a) be shorter
(b) be longer
(c) depend on the height of the girl
(d) not change
315: The river shown on the map is
(a) Irrawaddy
(b) Mekong
(c) Chao Phraya
(d) Salween