"Air is a mixture." Support this statement citing at least three evidences.

In some of the reactions, thallium resembles aluminium whereas in others it resembles with group 1 metals. Support this statement by giving some evidence.

Carbon dioxide : " Although carbon dioxide plays no role in respiration , all life would come to an end if there is no carbon dioxide in air . " Support this statement with relevant facts .

Is air a mixture or a compound?

Statement-1 : Strings of a guitar have different diameters. Statement-2 : String with least diameter produce the lower notes.

What are electrophilic reagents ? Give at least three examples.

Give arguments in support of the statement that there does not exist the largest natural number.

Give chemical reaction in support of the statement that all the bonds in PCl molecule are not equivalent.

What is the probability of getting at least three heads when flipping four coins?

Some of the properties of tissues are not the constituents of its cells. Give three exmples to support the statement.

Mist is a …………….mixture of droplets of water and air.