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 __________.
C. 92% *
1093. As the temperature of ice rises, the ice melts and its density _________.‘
B. Remain constant
C. Increases *
D. Increases upto 10 degree centigrade
1094. Water is a universal solvent for what reactions ?
D. Biochemical *
1095. The volume percentage of nitrogen in air is ____________.
D. 78% *
1096. Nitrogen occurs in plants and animals in the form of __________.
D. Proteins *
1097. Air contains volume of carbon dioxide approximately_______.
D. 0.03% *
1098. The gases which are used by divers as an artificial atmosphere are helium and __________.
B. Oxygen *
D. Carbon Monoxide
1099. The second most abundant metal found in the earth’s crust is ________.
A. Iron *
1100. Which of the following is involved in blood clotting ?
C. Calcium *