1091. Coke is made by heating Coal in the absence of air at ________.
A. 700-800 Degree centigrade
B. 900-950 Degree centigrade
C. 1000-1100 Degree centigrade *
D. 1700-1100 Degree centigrade
1092. In blood the percentage of water is __________.
A. 75%
B. 85%
C. 92% *
D. 95%
1093. As the temperature of ice rises, the ice melts and its density _________.‘
A. Decreases
B. Remain constant
C. Increases *
D. Increases upto 10 degree centigrade
1094. Water is a universal solvent for what reactions ?
A. Physical
B. Chemical
C. Nuclear
D. Biochemical *
1095. The volume percentage of nitrogen in air is ____________.
A. 60%
B. 67%
C. 74%
D. 78% *
1096. Nitrogen occurs in plants and animals in the form of __________.
A. Minerals
B. Fats
C. Carbohydrates
D. Proteins *
1097. Air contains volume of carbon dioxide approximately_______.
A. 3%
B. 33%
C. 0.3%
D. 0.03% *
1098. The gases which are used by divers as an artificial atmosphere are helium and __________.
A. Nitrogen
B. Oxygen *
C. Neon
D. Carbon Monoxide
1099. The second most abundant metal found in the earth’s crust is ________.
A. Iron *
B. Aluminium
C. Calcium
D. Sodium
1100. Which of the following is involved in blood clotting ?
A. Sodium
B. Magnecium
C. Calcium *
D. Potassium