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

The ether

when treated with HI produces:

In comparison to a 0.01 m solution of glucose, the depression in freezing point of a 0.01 m MgCl₂ solution is ______.

Which of the following statement is false?

If molality of dilute solution is doubled, the value of molal depression constant (K_f) will be ______.

Which has the highest freezing point?

Ozone is a/an _______ molecule and the two O-O bond lengths in ozone are (i) _______-and (ii) _________.

Given below are two statements labelled as Assertion (A) and Reason (R).

Assertion (A): Cryoscopic constant depends on nature of solvent.

Reason (R): Cryoscopic constant is a universal constant.

Select the most appropriate answer from the options given below:

Which of the following statements is false?

How does sprinkling of salt help in clearing the snow covered roads in hilly areas? Explain the phenomenon involved in the process.

Assertion: When NaCl is added to water a depression in freezing point is observed.

Reason: The lowering of vapour pressure of a solution causes depression in the freezing point.

What advantage do the fuel cells have over primary and secondary batteries?

Match the items of Column I and Column II.

Which of the following interface cannot be obtained?

Method by which lyophobic sol can be protected?

Which of the following colloids cannot be coagulated easily?

(i) Lyophobic colloids.

(ii) Irreversible colloids.

(iii) Reversible colloids.

(iv) Lyophilic colloids.

What happens when gelatin is mixed with gold sol?

Match the items given in Column I and Column II.

A number of elements are available in earth’s crust but most abundant elements are ______.

Explain why ozone is thermodynamically less stable than oxygen.

Coagulation of egg white on boiling is an example of denaturation of protein. Explain it in terms of structural changes.