206: Salinization occurs when the irrigation water accumulated in the soil evapo- rates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land?
(a) It greatly increases the crop production.
(b) It makes some soils impermeable.
(c) It raises the water table.
(d) It fills the air spaces in the soil with water.
207: Council of Ministers of the Union of India is responsible to:
(a) Rajya Sabha
(b) Prime Minister
(c) President
(d) Lok Sabha
208: A man takes 6 km distance to go round a rectangular area. If the area of the rectangle is 2 km, find the difference between length and breadth
(a) 1 km
(b) 0.5 km
(c) 2 km
(d) 0.75 km
209: The capital of India was shifted from Calcutta to Delhi in the year:
(a) 1905
(b) 1911
(c) 1912
(d) 1916
210: The waterfall "Victoria" is associated with the river
(a) Amazon
(b) Missouri
(c) St Lawrence
(d) Zambezi