Fundamental Laws and Discoveries in Chemistry

If there is a black coating on silver and the green coating on copper, then these are examples of ____________.

Aluminium is obtained by the electrolysis of pure $A{l}_2{O}_3$ dissolved in

Glucose is a type of:

Match the following.
A.Copper sulphate     1. Fertiliser
B.Penicillin                2. Insecticide
C.Urea                      3. Fungicide
D.Malathion               4. Antibiotic
 

Water and ice crystals are in equilibrium at $0°\mathrm{C}$. When pressure is applied to this system

The unit of rate of reaction is-

Which metal does not react with dilute $H_{2}S{O}_4 ?$

Which element produces hydrogen on reaction with strong alkali?

It is easy to burst a gas-filled balloon with a needle than with a nail. It is because—

Which part of the atom emits the radioactive radiation?

Imagine a solid object is placed at the bottom of a pool and floats when it is release. The object floats in water because ______.

Why does ice float in liquid water? 

To prevent freezing of petrol which of the following is added to aviation gasoline.

Fibre glass is used for making which type of plastic?

Which of the following is a chain reaction?

Which of the following is responsible for the pollution caused by a Supersonic jet?

The inexhaustible source of energy of the stars is due to—

On heating, Gypsum loses a certain percentage of its water content and becomes

The main constituents of pearls are:

When items of jewellery made of metals such as copper or nickel are placed in a solution having a salt of gold, a thin film of gold is deposited by--