2966: The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason?
(a) Ice is a bad conductor of heat
(b) Since the surface of the lake is at the same temperature as the air, no heat is lost
(c) The density of water is maximum at 4 degree celcius
(d) None of the statements (a), (b) and (c) given above is correct.
2967: Consider the following countries
1. China
2. France
3. India
4. Israel
5. Pakistan
Which among the above are Nuclear Weapons States as recognized by the Treaty on the Non-Proliferation of Nuclear Weapons, commonly known as Nuclear Non-Proliferation Treaty (NPT)?
(a) 1 and 2 only
(b) 1, 3, 4 and 5 only
(c) 2, 4 and 5 only
(d) 1, 2, 3, 4 and 5
2968: The Prevention of Food Adulteration Act came into force in:
(a) 1954
(b) 1955
(c) 1964
(d) 1976
2969: India is home to lakhs of persons with disabilities. What are the benefits available to them under the law?
1. Free schooling till the age of 18 years in government-run schools.
2. Preferential allotment of land for setting up business.
3. Ramps in public buildings.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
2970: Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to
1. resist drought and increase absorptive area
2. tolerate extremes of pH
3. resist disease infestation
Select the correct answer using the codes given below.
(a) 1 only
(b) 1 and 3 only
(c) 2 and 3 only
(d) 1, 2 and 3