Non-metals

A non-metal A which is the largest constituent of air, when heated with ${\mathrm{H}}_2$ in $1:3$ ratio in the presence of a catalyst (Fe) gives a gas B. On heating with ${\mathrm{O}}_2$ it gives an oxide C. If this oxide is passed into the water in the presence of air, it gives an acid D. which acts as a strong oxidising agent. To which group of the periodic table does this non-metal belong?

A nonmetal A which is the largest constituent of air, when heated with ${\mathrm{H}}_2$ in $1:3$ ratio in the presence of a catalyst (Fe) gives a gas B. On heating with  ${\mathrm{O}}_2$ it gives an oxide C. If the oxide is passed into the water in the presence of air it gives an acid D which acts as a strong oixidsing agent. Identify A, B, C, and D.

Write two physical and two chemical properties of nonmetals.

Non-metals are electronegative elements as they form negative ions by gaining electrons.

Nonmetals are good conductors of heat and electricity.

Give reason: Nonmetals, in general, do not displace hydrogen from dilute acids.

Out of two elements X and Y, X is malleable and ductile, on the other hand. Y is non-malleable and non-ductile. Which one forms anions?

Out of two elements X and Y, X is malleable and ductile, on the other hand. Y is non-malleable and non-ductile. Which one is a nonmetal?

Correct the statement by substituting the X and Y with correct options. X can't be drawn into wires because it is not Y in nature.

Which of the following non-metals is a liquid?

Electrical wires have a coating of insulating material. The material generally used is: 

Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?

Generally, non-metals are not lustrous. Which of the following non-metal is lustrous?

Which of the following is a nonmetal?

${}_{11}{}^{23}\mathrm{A}$ and ${}_{17}{}^{19}\mathrm{B}$

Name any three neutral oxides.

Metals displace hydrogen from dilute acids, where as non-metals do not. Give reason.

State three reasons for the following fact:

Sulphur is a non-metal.

One of the reasons must be supported with a chemical equation.

Write one example for the following:

A lustrous non-metal.

Give one example for the following:

A metal that has a very low melting point and a non-metal which has a very high melting point.

State the property utilised in the following:

Electrical wires are coated with polyvinyl chloride (PVC) or a rubber-like material.