Question : Limestone, chalk and marble are different forms of ______.

Option 1: Calcium Phosphate

Option 2: Calcium Hydroxide

Option 3: Calcium Oxide

Option 4: Calcium Carbonate

Question : In an acid-base reaction, which product is produced along with salt?

Option 1: Hydrogen gas

Option 2: Oxygen gas

Option 3: Carbon dioxide

Option 4: Water

Question : What is formed when carbon dioxide is passed through lime water?

Option 1: Copper sulphate

Option 2: Calcium carbonate

Option 3: Magnesium oxide

Option 4: Baking soda

Question : Transboundary pollution ( or ) Acid rain is caused by:

Option 1: Carbon monoxide

Option 2: Carbon dioxide

Option 3: Hydrocarbon

Option 4: Nitrogen oxide and sulphur dioxide

Question : What is" milk of magnesia chemically

Option 1: Magnesium carbonate

Option 2: Sodium bicarbonate

Option 3: Calcium hydroxide

Option 4: Magnesium hydroxide