Question : What is added to toothpaste to reduce tooth decay?

Option 1: Iron

Option 2: Cobalt

Option 3: Fluoride

Option 4: Molybdenum

Question : Which of the following minerals is responsible for the synthesis of thyroxine hormone?

Option 1: Iron

Option 2: Cobalt

Option 3: Calcium

Option 4: Iodine

Question : Cobalt therapy is the medical use of rays from the radioisotope cobalt-60 to treat conditions such as cancer.

Option 1: alpha

Option 2: beta

Option 3: gamma

Option 4: Ultraviolet

Question : Galvanisation is the 

Option 1: deposition of zinc on iron

Option 2: deposition of tin on iron

Option 3: deposition of copper on iron

Option 4: deposition of aluminium on iron

Question : What is the chemical name for the ionic compound MgCl₂?

Option 1: Sodium iodide

Option 2: Manganese chloride

Option 3: Caesium fluoride

Option 4: Magnesium chloride

Question : Which among the following is a covalent compound?

Option 1: Calcium chloride

Option 2: Magnesium fluoride

Option 3: Sodium chloride

Option 4: Carbon tetrachloride