1. Which of the following does not cause pollution? (a) Burning of petrol (b) Use of solar energy (c) Burning of rubber (d) All of the above 2. An invertebrate… Read more »


1. Mercury poisoning in man causes the disease (a) Black lung (b) Arsenicosis (c) Minamata (d) Tai-Etai 2. The yellow colour of urine is due to presence of (a) Bile… Read more »

Fertile male

1. Fat soluble vitamins are (a) Tocopherol, Niacin, Cyanocobalamin (b) Calciferol, Carotene, Tocopherol (c) Ascorbic acid, Calciferol, Riboflavin (d) Thiamine, Carotene, Biotin 2. Heart attack occurs due to (a) Bacterial… Read more »

Lake Victoria

1. The world’s largest island is (a) New Guinea (b) Madagascar (c) Greenland (d) Iceland 2. Black Forests are found in (a) France (b) Germany (c) Czechoslovakia (d) Rumania 3…. Read more »

Grand Canyon

1. Colorado in U.S.A. is famous for this landform ________ (a) Grand Canyon (b) Grand Crators (c) Great Valleys (d) Great Basins 2. The Victoria Falls are on the river… Read more »

Stone Cancer

1. Of which tissue nails, hoofs and horns are made of (a) Cutide (b) Chitin (c) Keratin (d) Tunicin Ans.(c) 2. Which chromosomal combination is responsible for maleness in man?… Read more »