Acids, Bases and Salts — Chemistry STD 10 — Question

The conversion of ethene to ethane is an example of ________(Hydration, hydrogenation).

Aluminium is an important constituent metal duralumin since it is ________. [a good conductor of heat/light in weight/unacted by acids]

pH scale was introduced by _________ in 1909.

The metal plate through which ____________ leaves from an electrolyte is called ____________ .It has ______________ of electrons.

Fill in the blanks:
Zinc blend is converted to oxide by ……… (roasting/calcination) process.

Covalent bond is rigid and directional, it is responsible for __________.

Element A has 2 electrons in its M shell. Element B has atomic number 7.
If the compound formed between A and B is melted and an electric current is passed through the molten compound , the element A will be obtained at the _________ and B at the ___________ of the electrolytic cell.

Sulphur can be converted to sulphuric acid using __________ nitric acid. (Concentrated, dilute)

The number of atoms present in one molecule of a substance is its____________

The hydrocarbons which contain a double covalent bond between two carbon atoms are called ________ .[Alkanes/Alkenes/Alkynes]