1666: Assertion (A):
Coal-based thermal power stations contribute to acid-rain.
Reason (R):
Oxides of carbon are emitted when the coal burns.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is NOT the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
1667: Economically, one of the results of the British rule in India in the 19th century was the
(a) increase in the export of Indian handicrafts
(b) growth in the number of Indian owned factories
(c) commercialization of Indian agriculture
(d) rapid increase in the urban population
1668: Schemes of (i) Urban Micro Enterprises, (ii) Urban Wage Employment, and (iii) Housing and Shelter Upgradation are parts of
(a) Integrated Rural Development Programme
(b) Nehru Rozgar Yojana
(c) Jawahar Rozgar Yojana
(d) Prime Minister's Rozgar Yojana
1669: Consider the following statements :
1. Steam at 100 Degree Celsius and boiling water at 100 Degree Celsius contain same amount of heat.
2. Latent heat of fusion of ice is equal to the latent heat of vaporization of water.
3. In an air-conditioner, heat is extracted from the room-air at the evaporator coils and is rejected out at the condenser coils.
Which of these statements is/are correct?
(a) 1 and 2
(b) 2 and 3
(c) Only 2
(d) Only 3
1670: A small pouch containing silica gel is often found in bottles of medicine in tablet or powder form because silica gel
(a) kills bacteria
(b) kills germs and spores
(c) absorbs moisture
(d) absorbs all gases present inside the bottle