Ncert Solutions Chemistry Class 12th

The major product formed in the following reaction is:

Monomer of Novolac is:

Which one of the following lanthanides exhibits +2 oxidation state with diamagnetic nature?

(Given Z for Nd = 60, Yb = 70, La = 57, Ce = 58)

In the structure of the dichromate ion, there is a:

The correct order of reactivity of the given chlorides with acetate in acetic acid is:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Aluminuim is extracted from bauxite by the electrolysis of molten mixture of Al₂O₃ with cryolite.

Reason (R): The oxidation state of Al in cryolite is +3.

In the light of the above statements, choose the most appropriate answer from the options given below:

Select the graph that correctly describes the adsorption isotherms at two temperature T₁ and T₂ (T₁ > T₂) for a gas:

 (x – mass of the gas adsorbed ; m – mass of adsorbent ; P – pressure

The structure of product C, formed by the following sequence of reactions is:

The number of hydrogen bonded water molecule(s)  associated with stoichiometry CuSO_{4 $\cdot$} 5H₂O is

The number of halogen/(s) forming halic (V) acid is_________.