Top 1000+ Solved Chemistry MCQ Questions Answer
Q. The Bhopal tragedy was caused by the gas -
a. phosgene
b. carbon monoxide
c. methyl isocyanate
d. chlorine
Q. Which one of the following contributes largely to the ‘green house effect’?
a. Ozone
b. Carbon monoxide
c. Carbon dioxide
d. Water vapour
Q. The gas that usually causes explosions in coal mines is -
a. Hydrogen
b. Carbon monoxide
c. Air
d. Methane
Q. The chemical name for common salt -
a. Sodium chloride
b. Sodium hydroxide
c. Sodium chlorate
d. Potasium chloride
Q. The chemical name of "Plaster of Paris" commonly used for setting broken bones is –
a. Calcium nitrate
b. Calcium sulphate
c. Calcium carbonate
d. Calcium chloride
Q. Which of the following is not a chemical reaction'?
a. Burning of paper
b. Digestion of food
c. Conversion of water into steam
d. Burning of coal
Q. Gypsum is used for improvement of:
a. Alkaline soils
b. Saline soils
c. (3) Podsols
d. (4) Acidic soils
Q. Spontaneous change is one in there is:
a. A lowering of entropy
b. A lowering of free energy
c. Increase in free energy
d. An increase in Internal energy
Q. In a freezer ice cubes will be formed more quickly in trays made of -
a. rubber
b. plastic
c. aluminium
d. wood
Q. The important metal used with iron to produce stainless steel is –
a. Al
b. Chromium
c. Tin
d. Carbon