Electrolysis — Chemistry STD 10 — Question

The colour of hydrated copper sulphate is ________. [light blue/black/white]

Brass is an alloy of _______ .

Fill in the blank :
Pure water consists entirely of …………..(ions,molecules)

Electrovalent compounds have __________ melting points.

One volume of water at room temperature absorbs ________ volumes of hydrogen chloride gas. [700/450]

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

Oil of Vitriol is ___________

We can expect that pure water _______ normally conduct electricity.

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

Fill in the blanks :
Powdered sodium chloride (common salt) does not conduct an electric current, but it does so when ………....... or when ………........