Chemistry

Which of the following vitamin is helpful is delaying the blood clotting?

Given below are two statements:

Statement I : A mixture of chloroform and aniline can be separated by simple distillation.

Statement II : When separating aniline from a mixture of aniline and water by steam distillation aniline boils below its boiling point.

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

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

Assertion A : Dipole – dipole interactions are the only non- covalent interaction, resulting in hydrogen bond formation.

Reason R : Fluorine is the most electronegative element and hydrogen bonds in HF are symmetrical.

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

On treating a compound with warm dil. H₂SO₄, gas X is evolved which turns K₂Cr₂O₇ paper acidified with dil. H₂SO₄ to a green compound Y. X and Y respectively are

Which one of the following compounds is aromatic in nature?

Hydrogen peroxide reacts with iodine in basic medium to give:

In the following sequence of reactions a compound A, (molecular formula C₆H₁₂O₂) with a straight chain structure gives a C4 caboxylic acid. A is

$A\underset{H_3{O}^{+}}{\overset{LiAI{H}_4}{\to }}B\underset{}{\overset{Oxidation}{\to }}{C}_4-carboxylicacid$

Which one of the following lanthanoids does not form MO₂?

[M is lanthanoid metal]

Which one of the following gives the most stable Diazonium salt?

Identify A in the following reaction