Chemistry NCERT Exemplar Solutions Class 12th Chapter Six

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

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

In isolation of which one of the following metals from their ores, the use of cyanide salt is not commonly involved?

Production of iron in blast furnace follows the following equation

$F{e}_3{O}_4\left(s\right)+4CO\left(g\right)\to 3Fe\left(I\right)+4C{O}_2\left(g\right)$

When 4.640 kg of Fe₃O₄ and 2.520 kg of CO are allowed to react then the amount of iron (in g) produced is:

[Given : Molar Atomic mass (g mo^-1); Fe = 56

Molar Atomic mass (g mol^-1); O = 16

Molar Atomic mass (g mol^-1); C = 12]