Chemistry

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

Assertion (A) : A simple distillation can be used to separate a mixture of propanol and propanone.

Reason (R) : Two liquids with a difference of more than 20°C in their boiling pints can be separated by simple distillations.

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

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:

BOD values (in ppm) for clean water (A) and polluted water (B) are expected respectively

The density of an organic ligand, biuret is:

The major component/ingredient of Portland Cement 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

Choose the correct name for compound given below: