Study of Compounds - Ammonia — Chemistry STD 10 — Question

More than 90% of the known organic compounds are. ________

Moving across a __________ of the periodic table, the elements show increasing __________ character.

Potassium sulphite on reacting with hydrochloric acid releases ________.

Vinegar is a solution of about ________ per cent ________ in water.

Each __________ in the periodic table is comprised of elements having the same number of electron shells.

Heating ammonium chloride with sodium hydroxide produces ______ (ammonia, nitrogen)

According to Avogadro's Law, if 2.0 dm³ of oxygen gas (O₂) is at the same temperature and pressure as N₂ gas, the number of molecules of oxygen is ________ (greater than/less than/equal to) the number of molecules of nitrogen.

The ore from which aluminium is extracted must first be treated with ________. [sodium hydroxide solution/dilute hydrochloric acid]

Cations are formed by ____ (loss/gain) of electrons and anions are formed by _________ (loss/gain) of electrons.