Chemistry Questions

Argon is most the most abundant Rare Gas in the atmosphere. Its elemental symbol is Ar. 

Sulphuric acid is called the King of Chemicals because it is used in the preparation of a very large number of other useful chemicals such as hydrochloric acid, nitric acid, dyes, drugs etc. In fact the annual production of shulpuric acid in a country is a measure of the economy of the country.

Here in the given options, Diamond is an element as it is the allotrope of the carbon atom.

In vulcanization, cruder rubber is heated with 3% sulphur at about for 1200C for 2-3 hours.

Vulcanised rubber is a vastly improved product.