Chemistry NCERT Exemplar Solutions Class 12th Chapter Six

${\left(C_7{H}_5{O}_2\right)}_2\stackrel{hv}{\to }\left[X\right]\to 2{\stackrel{•}{C}}_6{H}_5+2C{O}_2$

Consider the above reaction and identify the intermediate 'X'

Given below are two statements:

Statement I: In 'Lassaigne's Test', when both nitrogen and sulphur are present in an organic compound, sodium thiocyanate is formed.

Statement II: If both nitrogen and sulphur are present in an organic compound, then the excess of sodium used in sodium fusion will decompose the sodium thiocyanate formed to given NaCN and Na₂S.

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

Polar stratospheric clouds facilitate the formation of

Consider the following reaction:

A + alkali  → B(Major Product)

If B is an oxoacid of phosphorous with no P-H bond, then A is

The correct order of melting points of hydrides of group 16 elements is

The correct order of melting point is

Consider the following reaction.

$2HS{O}_4^{-}\left(aq\right)\underset{\left(2\right)Hydrolysis}{\overset{\left(1\right)Electrolysis}{\to }}2HS{O}_4^{-}+2H^{+}+A$

The dihedral angle in product A in its solid phase at 110 K is

Given below are two statements:

Statement I: According to the Ellingham diagram, any metal oxide with higher  is more stable that the one with lower .

Statement II: The metal involved in the formation of oxide placed lower in the Ellingham diagram can reduce the oxide of a metal placed higher in the diagram.

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

Choose the correct stability order of group 13 elements in their +1 oxidation state.

The ${\left(\frac{\partial E}{\partial T}\right)}_P$ of different types of half cells are as follows:

(Where E is the electromotive force )

Which of the above half cells would be preferred to be used as reference electrode