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

Account for the following :

H₂S has lower boiling point than H₂O.

Account for the following :

Iron on reaction with HCl forms FeCl₂ nd not FeCl₃.

Examine the given defective crystal:

Answer the following questions :
(i) What type of stoichiometric defect is shown by the crystal?
(ii) How is the density of the crystal affected by this defect?
(iii) What type of ionic substances show such defect?

Give one example each of sol and gel.

 Arrange the following increasing order of their boiling point:
CH₃CH₂OH, CH₃CHO, CH₃–O–CH₃ 

What type of defect is shown by NaCl in 
 stoichiometric defects, and

 non-stoichiometric defects?

Out of NaCl and AgCl, which one shows Frenkel defect and why? 

Arrange the following in increasing order of boiling points:

(CH₃)₃ N, C₂ H₅ OH, C₂ H₅ NH₂

Write the monomers of the following polymer : 

Differentiate between the following :

Peptide linkage and Glycosidic linkage 

Answer the following question.
What type of stoichiometric defect is shown by ZnS and why?

Write equations of the following reactions:
Acetylation of aniline

Ionic solids containing large differences in sizes of ions show ____________.

Defect shown by non-ionic solids is ____________.

Defects in solids can be studied using

Point defect is also known as ____________.

Dislocation defect is also known as ____________.

Frenkel defects are not found in alkali metal halides because ____________.

The radius of Cs⁺ is 169 pm and Cl⁻ is 181 pm. The radius ratio is ____________.