2686: In which one of the following oceans is Diamantina Trench situated ?
(a) Indian Ocean
(b) Atlantic Ocean
(c) Arctic Ocean
(d) Pacific Ocean
2687: Mulching the soil is a process whereby:
(a) Big pieces of soil are broken down into smaller pieces
(b) The field is irrigated at regular intervals
(c) Transplanting of seedlings take place
(d) Loose material, dung, etc. are laid on the ground to prevent excessive evaporation or erosion of the soil
2688: With reference to Indias satellite launch vehicles, consider the following statements:
1. PSLVs launch the satellites useful for Earth resources monitoring whereas GSLVs are designed mainly to launch communication satellites.
2. Satellites launched by PSLV appear to remain permanently fixed in the same position in the sky, as viewed from a particular location on Earth.
3. GSLV Mk III is a four-staged launch l vehicle with the first and third stages l using solid rocket motors; and the second and fourth stages using liquid rocket engines.
Which of the statements given above is/are correct.?
(a) 1 only
(b) 2 and 3
(c) 1 and 2
(d) 3 only
2689: In how many maximum different ways can 3 identical balls be placed in the 12 squares (each ball to be placed in the exact centre of the squares and only one ball is to be placed in one square) shown in the figure given below such that they do not lie along the same straight line?
(a) 144
(b) 200
(c) 204
(d) 216
2690: Consider the following pairs:
1. Ashok Leyland : Hinduja Group
2. Hindalco Industries : A.V. Birla Group
3. Suzlon Energy : Punj Lloyd Group
Which of the pairs correctly matched?
(a) 1 & 2
(b) 2 only
(c) 1 & 3
(d) 1, 2, 3