### Book Store

Currently only available for.
CBSE Gujarat Board Haryana Board

### Previous Year Papers

Download the PDF Question Papers Free for off line practice and view the Solutions online.
Currently only available for.
Class 10 Class 12

In Haber's process, hydrogen is obtained by reacting methane with steam in presence of NiO as catalyst. The process is known as steam reforming. Why is it necessary to remove CO when ammonia is obtained by Haber’s process?

Presence of CO in the synthesis of ammonia by Haber’s process adversely affects the activity of iron catalyst.
3659 Views . 11 Shares

Why does physisorption decrease with the increase of temperature?

It is because physical adsorption involves weak forces of attraction between adsorbent and adsorbent molecules, generally of Vander Waal's type. These forces decrease rapidly with increase in temperature.
1705 Views . 8 Shares

Why is the ester hydrolysis slow in the beginning and becomes faster after sometime?

Ester + water ---> Acid + Alcohal
The acid produced in the reaction acts as a catalysis and makes the reaction faster.

1214 Views . 4 Shares

Why are powdered substances more effective adsorbents than their crystalline forms?

Powderded substance are more effective adsorbent than their crystalline forms because when a substance is powdered its surface area increase and physisorption is directly proportional to the surface area of adsorbent,
1109 Views . 9 Shares

Why are substances like platinum and palladium often used for carrying out electrolysis of aqueous solutions?