Question : What causes the mottling of the dental enamel?

Option 1: High levels of chlorine in water

Option 2: High levels of nitrate in the water

Option 3: High levels of fluorides in the water

Option 4: High levels of calcium in the water

Question : Two vessels contain milk and water in the ratios 3 : 2 and 7 : 3. Find the ratio in which the contents of the two vessels have to be mixed to get a new mixture in which the ratio of milk and water is 2 : 1.

Option 1: 2 : 1

Option 2: 1 : 2

Option 3: 4 : 1

Option 4: 1 : 4

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

Question : Pregnant women usually become deficient in

Option 1: Sodium and Calcium

Option 2: Iron and Sodium

Option 3: Calcium and Iron

Option 4: Magnesium and Iron

Question : What is" milk of magnesia chemically

Option 1: Magnesium carbonate

Option 2: Sodium bicarbonate

Option 3: Calcium hydroxide

Option 4: Magnesium hydroxide