Question : The science of Dactylography is commonly known as 

Option 1: Carbon dating 

Option 2: Water printing

Option 3: Finger printing

Option 4: Electro cardiogram

Question : Which of the following gases is known as "laughing gas"?

Option 1: Nitrous oxide

Option 2: Nitrogen peroxide

Option 3: Nitrogen

Option 4: Nitric oxide

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 the product of a reaction of calcium carbonate, water, and carbon dioxide?

Option 1: Calcium oxide

Option 2: Calcium hydroxide

Option 3: Hydrochloric acid

Option 4: Calcium Hydrogen Carbonate