............is a composite radical.

.............. is a bicarbonate radical

The valency of element with electronic configuration ........... is 2.

The symbol of Avogadro’s number is ...............

What is the SI unit of temperature?

The mass of an atom is concentrated in its........... .

The unit Dalton is used to express................. .

Which of the following materials expands the most when heated?

Iron (Fe) exhibits the variable valencies as.............. .

Which of the following statements about density is correct?

A mole of any substance stands for ............... molecules.

What is the SI unit of length?

Which of the following instruments is used to measure length with high precision?

Which instrument is used to measure mass?

Which of the following materials has the highest density?

What is the SI unit of mass?

Molecular formula of sodium sulphate is.................

............ g of water make 1 mole of water.

Which instrument is used to measure atmospheric pressure?

Which of the following is used to measure the volume of irregularly shaped objects?

The SI unit of volume is:

Which of the following is a derived unit?

The formula to calculate density is:

What is the density of water?

What is the SI unit of density?