Question : Which of the following are metalloids?

Option 1: Boron, Oxygen, Aluminium

Option 2: Boron, Mercury, Iron

Option 3: Boron, Silicon, Antimony

Option 4: Aluminium, Mercury, Copper

Question : The element which is the most abundant in the human body is :
 

Option 1: Oxygen

Option 2: Carbon

Option 3: Iron

Option 4: Nitrogen

Question : The element absorbed both in cation and anion form is

Option 1: Sulphur

Option 2: Nitrogen

Option 3: Calcium

Option 4: Phosphorus

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 : Which one of the following forms of phosphorus is most reactive?

Option 1: Black phosphorus

Option 2: White phosphorus

Option 3: Violet phosphorus

Option 4: Red phosphorus