Problem 63
In cquilibrium \(2 \mathrm{SO}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_{3}(\mathrm{~g})\), the partial pressure of \(\mathrm{SO}_{2}, \mathrm{O}_{2}\) and \(\mathrm{SO}_{3}\) are \(0.662,0.101\) and \(0.331\) atm, respectively. What would be the partial pressurc of oxygen so that the equilibrium concentration of \(\mathrm{SO}_{2}\) and \(\mathrm{SO}_{3}\) arc equal? (1) \(0.4 \mathrm{~atm}\) (2) \(1.0 \mathrm{~atm}\) (3) \(0.8 \mathrm{~atm}\) (4) \(0.25\) atm
Problem 64
IIClO is a weak acid. The concentration of II \(^{+}\) ions in \(0.1 \mathrm{M}\) solution of IIClO \(\left(K_{\mathrm{a}}=5 \times 10^{-5}\right)\) will be cqual to (1) \(7.07 \times 10^{-5} \mathrm{M}\) (2) \(5 \times 10^{-7} \mathrm{M}\) (3) \(5 \times 10^{-4} \mathrm{M}\) (4) \(7 \times 10^{-4} \mathrm{M}\)
Problem 65
For the reaction \(\mathrm{PCl}_{3}(\mathrm{~g})+\mathrm{Cl}_{2}(\mathrm{~g}) \rightleftharpoons \mathrm{PCl}_{5}(\mathrm{~g})\), the value of \(\mathrm{K}_{\mathrm{C}}\) at \(250^{\circ} \mathrm{C}\) is 26 . The valuc of \(\mathrm{K}_{\mathrm{p}}\) at this tempcrature will \(\mathrm{bc}\) (1) \(0.605\) (2) \(0.57\) (3) \(0.83\) (4) \(0.46\)
Problem 66
One mole of nitrogen was mixed with 3 moles of hydrogen in a closed 3 litre vessel. \(20 \%\) of nitrogen is converted into \(\mathrm{NH}_{3}\). Then, \(\mathrm{K}_{\mathrm{C}}\) for the \(1 / 2 \mathrm{~N}_{2}+3 / 2 \mathrm{H}_{2}\) \(\rightleftharpoons \mathrm{NH}_{3}\) is(1) \(0.36\) litre mol 1 (2) \(0.46\) litre mol (3) \(0.5 \mathrm{~mol}\) ' litre (4) \(0.2 \mathrm{~mol}^{\text {' }}\) litre
Problem 66
The \(\mid \mathrm{OH}\) I in \(100 \mathrm{~mL}\) of \(0.015 \mathrm{M} \mathrm{HCl}(\mathrm{aq})\) is (1) \(5 \times 10^{-12} \mathrm{M}\) (2) \(3 \times 10^{-10} \mathrm{M}\) (3) \(6.7 \times 10^{-13} \mathrm{M}\) (4) \(2.0 \times 10^{-9} \mathrm{M}\)
Problem 67
\(1.1\) mole of \(\Lambda\) is mixed with \(2.2\) molc of \(B\) and the mixture is then kept in \(1-\mathrm{L}\) flask till the cquilibrium is attained \(\Lambda+2 \mathrm{~B} \rightleftharpoons 2 \mathrm{C}+\mathrm{D} \cdot \Lambda \mathrm{t}\) the equilibrium \(0.2\) mole of \(C\) are formed. The equilibrium constant of the reaction is (1) \(0.001\) (2) \(0.222\) (3) \(0.003\) (4) \(0.004\)
Problem 68
The \(\mathrm{pH}\) of a solution produced when an aqueous solution of strong acid \(\mathrm{pH} 5\) mixed with equal volume of an aqueous solution of strong acid of \(\mathrm{pH} 3\) is (1) \(3.3\) (2) \(3.5\) (3) \(4.5\) (4) \(4.0\)
Problem 69
At a given temperature, the \(\mathrm{K}_{\mathrm{c}}\) for the reaction \(\mathrm{PCl}_{5}(\mathrm{~g}) \rightleftharpoons \mathrm{PCl}_{3}(\mathrm{~g})+\mathrm{Cl}_{2}(\mathrm{~g})\) is \(2.4 \times 10^{-3} .\) At the same temperature, the \(K_{\mathrm{C}}\) for the reaction \(\mathrm{PCl}_{3}(\mathrm{~g})+\) \(\mathrm{Cl}_{2}(\mathrm{~g}) \rightleftharpoons \mathrm{PCl}_{5}(\mathrm{~g})\) is (1) \(2.4 \times 10^{-3}\) (2) \(2.4 \times 10^{-3}\) (3) \(4.2 \times 10^{2}\) (4) \(4.8 \times 10^{-2}\)
Problem 71
The phenomenon of interaction of anions and cations furnished by clectrolyte with \(\mathrm{II}^{+}\) and OIT - ions of water to producc acidic nature or alkalinity is known as hydrolysis. In hydrolysis(1) The \(\mathrm{pH}\) may either increase or decrease (2) All the salts (except those made up with strong acid and base) undergo hydrolysis (3) The variation of \(\mathrm{pH}\) depends upon the nature of salt as well as on the temperature (4) All
Problem 72
Thc pair of salts that does not hydrolyze (1) \(\mathrm{FcCl}_{3}, \mathrm{Sn} \mathrm{Cl}_{4}\) (2) \(\mathrm{CaCl}_{2}, \mathrm{~K}_{2} \mathrm{SO}_{4}\) (3) \(\mathrm{CuSO}_{4}, \Lambda 1 \mathrm{Cl}_{3}\) (4) \(\mathrm{NII}_{4} \mathrm{Cl}, \mathrm{Na}_{2} \mathrm{CO}_{3}\)
