From all the given options, diamond is an element.

The rare gas which is present most abundantly in air is argon.

Butane is a major constituent of LPG.

James Chadwick discovered neutron.

Vinegar is an aqueous solution of acetic acid.

Acetylene or ethylene is used for artificial ripening of green fruits.

The process of fermentation was discovered by Louis Pasteur. Yeast bacteria are used to produce alcohol.

Copper does not react with steam because it is one of the most non-reactive metals.

Next to hydrogen, the lightest gas known is helium.

Atoms of an element differ from atoms of all the other elements in atomic number and electronic configuration.

Carbon dioxide can be prepared by the reaction of marble with sulphuric acid.

NaHCO₃ is mainly prepared by the Solvay process, which is the reaction of sodium chloride, ammonia and carbon dioxide in water.

CaCO₃ is used as a building material in the form of marble.

The toothpastes we use in our daily life are of mildly basic nature.

Sodium chloride does not undergo sublimation.

Our body works in the pH range of 7.0 - 7.5.

Ethyne gas is known as illuminating gas.

It is difficult to break an iron nail because of strong force of attraction.

Sponge is compressible although it is a solid because it has minute holes in which air is trapped.

Statement 1 is wrong. A basic compound (like baking soda) is used to neutralise the effect of bee sting, which produces formic acid. Statement 2 is correct. Plaster of Paris is mainly an organic compound of calcium. It is basically calcium sulphate.