Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Chemistry

Write the IUPAC name of the follow

\[\begin{array}\ce{\phantom{--..}O}\\\ce{\phantom{--..}||}\\ \ce{CH2=CH-C-CH3}\end{array}\]

 Tendency to show –3 oxidation state decrease from Nitrogn (N) to Bismuth (Bi).

Which one of the following is a disinfectant?
0.2% solution of phenol or 1% solution of phenol 

Define the following terms with a suitable example of each: 
 Antiseptics 

Account for the following : 
 Ti⁴⁺ is colourless whereas V⁴⁺  is coloured in an aqueous solutions. 

Why do transition metals exhibit higher enthalpy of atomization? 

How does chemisorption vary with temperature?

How does chemisorption vary with temperature?

Give reason for the following:

The transition metals generally form coloured compounds.

Complete the following reaction:
\[\ce{(C6H5CH2)2Cd + 2CH3COCI}\]

Which of the following is true about chemisorption?

Adsorption increases when ____________.

Which among the following is a property of physisorption?

Powdered substances are more effective adsorbents than their crystalline forms because ____________.

Which among the following is true for chemisorption?

In physisorption, adsorption is generally ____________.

Chromatography is based on the principle of ____________.

The extent of adsorption increases with the ____________.

The physical adsorption is due to ____________.

The process of separating gangue and other impurities from the metals is known as ____________.