Chemistry NCERT Exemplar Solutions Class 12th Chapter Seven

For the equilibrium $A\rightleftharpoons B$ , the variation of the rate of the forward (a) and reverse (B) reaction with time is given by:

At 600K, 2 mol of NO are mixed with 1 mol of O₂.

2NO_(g) + O₂(g) $\rightleftarrows$  2NO₂(g)

The reaction occurring as above comes to equilibrium under a total pressure of 1 atm. Analysis of the system shows that 0.6 mol of oxygen are present at equilibrium. The equilibrium constant for the reaction is__________. (Nearest integer)

Concentrated HNO₃ reacts with Iodine to give

White phosphorus reacts with thionyl chloride to give

The quantity of electricity in Faraday needed to reduce 1 mol of $C{r}_2{O}_7^{2-}$  to Cr³⁺ is________.

The solubility product of a sparingly soluble salt A₂X₃ is 1.1 * 10^-23. If specific conductance of the solution is 3 * 10^-1, the limiting molar conductivity of the solution is x * 10^-3 S m² mol^-1. The value of x is_________.

Given below are two statements:

Statement I : The pentavalent oxide of group-15 element, E₂O₅, is less acidic than trivalent oxide, E₂O₃, of the same element.

Statement II : The acidic character of trivalent oxide of group 15 elements, E₂O₃ decreases down the group.

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

Nitrogen gas is obtained by thermal decomposition of

If the solubility product of PbS is 8 * 10^-28, then the solubility of PbS in pure water at 298 K is $x*10^{-16}mol{L}^{-1}.$  The value of x is__________. (Nearest integer)

[Given: $\sqrt[]{2}=1.41]$  

When 600 mL of 0.2 M HNO₃ is mixed with 400 mL of 0.1 M NaOH solution in a flask, the rise in temperature of the flask is_________ * 10^-2 °C.

(Enthalpy of neutralization = 57 kJ mol^-1 and Specific heat of water = 4.2 JK^-1 g^-1)

(Neglect heat capacity of flask)