1931: Azolla gives a good biofertilizer when mixed with:
(a) Blue-green algae
(b) Cow dung
(c) Bone-meal
(d) Urea
1932: Which one of the following is not a digestive enzyme in the human systems?
(a) Trypsin
(b) Gastrin
(c) Yellow and violet
(d) Indigo and yellow
1933: A solid cube just gets completely immersed in water when a 0.2 kg mass is placed on it. If the mass is removed, the cube is 2 cm about the water level. What is the length of each side of the cube?
(a) 12 cm
(b) 10 cm
(c) 8 cm
(d) 6 cm
1934: An astronaut weighing 100 kg fires a bullet weighing 1 kg with a gun of 10 kg at the speed of 50 metres/second. What will be the recoil velocity of the gun ?
(a) 5 cm/s
(b) 50 cm/s
(c) 0.5 cm/s
(d) 0.05 cm/s
1935: According to the World Development Report, low income economies are those for which the per capita GNP in 1994 was
(a) US $ 925 or less
(b) US $ 825 or less
(c) US $ 725 or less
(d) US $ 525 or less