Which of the following is an example of a chemical change?

A pure substance which contains only one type of atom is called ____.

Which of the following is a homogeneous mixture?

The prefix ${10}^{18}10^\{18\}$ is

Recently the Unit of Atomic Mass “amu” is replaced by

Which One will have Maximum Numbers of Water Molecules?

Which of these natural resources is considered as non-renewable resource?

Which of the following given below is an alloy of mercury?

What is the process by which a gas is converted into a solid?

Common name of the compound $CaOC{l}_{2}CaOCl\_2$ is ___