Download App

6.1. Equilibrium - 1 (chemical Equilibrium) — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry6.1. Equilibrium - 1 (chemical Equilibrium)1 Mark
MCQ
If equilibrium constant for reaction $2AB$ $\rightleftharpoons$ ${A_2} + {B_2}$, is $49$, then the equilibrium constant for reaction $AB$ $\rightleftharpoons$ $\frac{1}{2}{A_2} + \frac{1}{2}{B_2}$, will be
  • ✓
    $7$
  • B
    $20$
  • C
    $49$
  • D
    $21$
✓

Answer

Correct option: A.
$7$
(a) $2AB$ $ \rightleftharpoons $ ${A_2} + {B_2}$

${K_c} = \frac{{[{A_2}]\,\,[{B_2}]}}{{{{[AB]}^2}}}$

For reaction $AB$ $ \rightleftharpoons $ $\frac{1}{2}{A_2} + \frac{1}{2}{B_2}$

${{K}_{c}}^{'}=\frac{{{[{{A}_{2}}]}^{{1}/{2}\;}}{{[{{B}_{2}}]}^{{1}/{2}\;}}}{[AB]}$;   ${{K}_{c}}^{'} =\sqrt{{{K}_{c}}} =\sqrt{49} =7$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 6.1. Equilibrium - 1 (chemical Equilibrium)→6.1. Equilibrium - 1 (chemical Equilibrium) — all question types→Chemistry STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

Molar mass of the hydrocarbon $(X)$ which on ozonolysis consumes one mole of $O _3$ per mole of $( X )$ and gives one mole each of ethanal and propanone is $......g\,mol ^{-1}$ (Molar mass of $C : 12\,g\,mol ^{-1}, H : 1\,g\,mol ^{-1}$ )
→
Who developed the long form of periodic table
→
Correct stability order of the given tautomers is
→
Consider the reaction

$4 HNO _{3}(l)+3 KCl ( s ) \rightarrow Cl _{2}( g )+ NOCl ( g )+ 2 H _{2} O ( g )+3 KNO _{3}( s )$

The amount of $HNO _{3}$ required to produce $110.0 \;g$ of $KNO _{3}$ is $...... \;g$

(Given : Atomic masses of $H , O , N$ and $K$ are $1 , 16,14$ and $39$ respectively.)

→
In commercial gasolines the type of hydrocarbons which are more desirable, is:
→
An alkene on ozonolysis gave acetaldehyde the alkene is
→
In a Lassaignes’s test for sulphur in the organic compound with sodium nitroprusside solution the purple colour formed is due to
→
Benzene and naphthalene form an ideal solution at room temperature. For this process, the true statement$(s)$ is (are)

$(A)$ $\Delta G$ is positive $(B)$ $\Delta S _{\text {system }}$ is positive

$(C)$ $\Delta S _{\text {surroundings }}=0$ $(D)$ $\Delta H =0$

→
Suppose following reaction $C$ and $D$ are related as

$CH \equiv CH\xrightarrow[{(excess)}]{{NaN{H_2}/liq.N{H_3}}}A\xrightarrow{{2C{H_3} - I}}B\xrightarrow[{quinolene}]{{{H_2}/Pd - BaS{O_4}}}C$

$C\xrightarrow[{quinolene}]{{{H_2}/Pd - BaS{O_4}}}\xrightarrow[{liq.\,N{H_3}}]{{NaN{H_2}}}D$

→
$10\,mole$ of ferric oxalate is oxidised by $x$ mole of $MnO_4^-$ in acidic medium. The value of $'x'$ is 
→