836: 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.
837: A ball is dropped from the top of a high building with a constant acceleration of 9.8 m/s2. What will be its velocity after 3 seconds ?
(a) 9.8 m/s
(b) 19.6 m/s
(c) 29.4 m/s
(d) 39.2 m/s
838: Match the hormones in List I with items in List II and select the correct answer using the codes given below the Lists :
List I
I. Adrenaline
II. Estrogen
III. Insulin
IV. Pheromones
List II
(A) Anger, fear, danger
(B) Attracting partners through sense of smell
(C) Females
(D) Glucose
Codes:
(a) I-C, II-A, III-D, IV-B
(b) I-A, II-C, III-B, IV-D
(c) I-A, II-C, III-D, IV-B
(d) I-C, II-A, III-B, IV-D
839: Which one of the following is not a member of the Shanghai Cooperation Organisation ?
(a) Russia
(b) Ukraine
(c) Kazakhstan
(d) Uzbekistan
840: Consider the following statements:
1. There are 25 High Courts in India.
2. Punjab, Haryana and the Union Territory of Chandigarh have a common High Court.
3. National Capital Territory of Delhi has a High Court of its own.
Which of the following statements given above is/are correct?
(a) 1 and 2
(b) 2 and 3
(c) 3 only
(d) 1, 2 and 3