6.1. Equilibrium - 1 (chemical Equilibrium) - Gujarat Board (GSEB) STD 11 Science Chemistry Questions

Q 1M.C.Q (1 Marks)1 Mark

For the reaction $2 \mathrm{~A} \rightleftharpoons \mathrm{B}+\mathrm{C}, \mathrm{Kc}=4 \times 10^{-3}$. At a given time, the composition of reaction mixture is: $[A]=[B]=[C]=2 \times 10^{-3} \mathrm{M}$.

Then, which of the following is correct?

A
Reaction has a tendency to go in forward direction.
✓
Reaction has a tendency to go in backward direction.
C
Reaction has gone to completion in forward direction.
D
Reaction is at equilibrium.

Answer: B.

View full solution →

Q 2M.C.Q (1 Marks)1 Mark

In which of the following equilibria, $\mathrm{K}_p$ and $\mathrm{K}_{\mathrm{c}}$ are $NOT$ equal?

A
$\mathrm{H}_{2(\mathrm{~g})}+\mathrm{I}_{2(\mathrm{~g})} \rightleftharpoons 2 \mathrm{HI}_{(\mathrm{g})}$
B
$\mathrm{CO}_{(\mathrm{g})}+\mathrm{H}_2 \mathrm{O}_{(\mathrm{g})} \rightleftharpoons \mathrm{CO}_{2(\mathrm{~g})}+\mathrm{H}_{2(\mathrm{~g})}$
C
$\quad 2 \mathrm{BrCl}_{(\mathrm{g})} \rightleftharpoons \mathrm{Br}_{2(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})}$
✓
$\mathrm{PCl}_{5(\mathrm{~g})} \rightleftharpoons \mathrm{PCl}_{3(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})}$

Answer: D.

View full solution →

Q 3M.C.Q (1 Marks)1 Mark

Consider the following reaction in a sealed vessel at equilibrium with concentrations of

$ \mathrm{N}_2=3.0 \times 10^{-3} \mathrm{M}, \mathrm{O}_2=4.2 \times 10^{-3} \mathrm{M} \text { and } \mathrm{NO}=2.8 \times 10^{-3} \mathrm{M} . $

$ 2 \mathrm{NO}_{(\mathrm{g})} \rightleftharpoons \mathrm{N}_{2(\mathrm{~g})}+\mathrm{O}_{2(\mathrm{~g})}$

If $0.1 \mathrm{~mol} \mathrm{~L} \mathrm{~L}^{-1}$ of $\mathrm{NO}_{(\mathrm{g})}$ is taken in a closed vessel, what will be degree of dissociation ( $\alpha$ ) of $\mathrm{NO}_{(\mathrm{g})}$ at equilibrium?

A
$0.0889$
B
$ 0.8889$
✓
$ 0.717$
D
$ 0.00889$

Answer: C.

View full solution →

Q 4M.C.Q (1 Marks)1 Mark

The equilibrium concentrations of the species in the reaction $A + B \rightleftharpoons C + D$ are $2,3,10$ and $6\,mol\,L-1$, respectively at $300\,K . \Delta G ^{\circ}$ for the reaction is ( $\left.R =2\,cal / mol\, K \right)$

A
$-13.73\,cal$
B
$1372.60\,cal$
C
$-137.26\,cal$
✓
$-1381.80\,cal$

Answer: D.

View full solution →

Q 5M.C.Q (1 Marks)1 Mark

$3 O _{2}( g ) \rightleftharpoons 2 O _{3}( g )$

for the above reaction at $298 K , K _{ c }$ is found to be $3.0 \times 10^{-59}$. If the concentration of $O _{2}$ at equilibrium is $0.040 M$ then concentration of $O _{3}$ in $M$ is ...... .

A
$1.9 \times 10^{-63}$
B
$2.4 \times 10^{31}$
C
$1.2 \times 10^{21}$
✓
$4.38 \times 10^{-32}$

Answer: D.

View full solution →

6.1. Equilibrium - 1 (chemical Equilibrium) question types

6.1. Equilibrium - 1 (chemical Equilibrium) questions

Generate a 6.1. Equilibrium - 1 (chemical Equilibrium) paper free

6.1. Equilibrium - 1 (chemical Equilibrium) Chemistry - 6.1. Equilibrium - 1 (chemical Equilibrium)

6.1. Equilibrium - 1 (chemical Equilibrium) question types

6.1. Equilibrium - 1 (chemical Equilibrium) questions

Generate a 6.1. Equilibrium - 1 (chemical Equilibrium) paper free