2576: Normally, the temperature decreases with the increase in height from the Earth's surface, because
1. the atmosphere can be heated upwards only from the Earth's surface
2. there is more moisture in the upper atmosphere
3. the air is less dense in the upper atmosphere
Select the correct answer using the codes given below :
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
2577: In the context of India, which of the following factors is/are contributor/contributors to reducing the risk of a currency crisis?
1. The foreign currency earnings of Indias IT sector
2. Increasing the government expenditure
3. Remittances from Indians abroad
Select the correct answer using the code given below:
(a) 1 only
(b) 1 and 3 only
(c) 2 only
(d) 1, 2 and 3
2578: Out of the three annual examinations, each with a total of 500 marks, a student secured average marks of 45% and 55% in the first and second annual examinations. To have an overall average of 60%, how many marks does the student need to secure in the third annual examination ?
(a) 450
(b) 400
(c) 350
(d) 300
2579: Through which one of the following Straits, does a tunnel connect the United Kingdom and France ?
(a) Strait of Gibraltar
(b) Denmark Strait
(c) Strait of Dover
(d) Davis Strait
2580: Since 1980, the share of the tertiary sector in the total GDP of India has
(a) shown an increasing trend
(b) shown a decreasing trend
(c) remained constant
(d) been fluctuating