Ncert Solutions Chemistry Class 11th

250 mL  of 0.5 M NaOH was added to 500 mL of 1 M HCl. The number of unreacted HCl molecules in the solution after complete reaction is_________ * 10²¹ (Nearest integer)

(N_A = 6.022 *10²³)

$2S{O}_2\left(g\right)+O_2\left(g\right)\rightleftharpoons 2S{O}_3\left(g\right)$

In a equilibrium mixture, the partial pressures are

$P_{S{O}_3}=43kPa;P_{o_2}=530Paand$            

$P_{S{O}_2}=45kPa.$ The equilibrium constant K_p = ___________ * 10^-2 (Nearest integer)

The species given below that does NOT show disproportionation reaction is:

For a given chemical reaction A ® B at 300 K at the free energy change is – 49.4 kJ mol^-1 and the enthalpy of reaction is 51.4 kJ mol^-1. The entropy change of the reaction is________J K ^-1 mol^-1_.

The single largest industrial application of dihydrogen is:

The set in which compounds have different nature is:

The metal that can be purified economically by fractional distillation method is:

Green chemistry in day-to day life is in the use of:

A s-block element (M) reacts with oxygen to form an oxide of the formula MO₂. The oxide is pale yellow in colour and paramagnetic. The element (M) is:

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

Assertion A: The dihedral angles in H₂O₂ in gaseous phase is 90.2° and in solid phase is 111.5°

Reason R: The  change in dihedral angle in solid and gaseous phase is due to the difference in the intermolecular forces.

Choose the most appropriate answer from the options given below for A and R.