The effect of addition of helium gas to the following reaction in equilibrium state at constant volume, is : PCI 5 ( g ) ⇌ PCl 3 ( g ) + Cl 2 ( g )

addition of helium will not affect the equilibrium.

the equilibrium will shift in the forward direction and more of Cl 2 and PCl 3 gases will be produced.

the equilibrium will go backward due to suppression of dissociation of PCl 5 .

helium will deactivate PCl 5 and reaction will stop.

EASY

JEE Main

IMPORTANT

Earn 100

$100 mL$ of $0.1 M HCl$ is taken in a beaker and to it $100 mL$ $0.1 M NaOH$ of is added in steps of $2 mL$ and the $pH$ is continuously measured. Which of the following graphs correctly depicts the change in $pH$ ?

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Important Questions on Equilibrium

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 5 - Equilibrium>JEE Main - 3 September 2020 Shift 1>Q 50

An acidic buffer is obtained on mixing:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 5 - Equilibrium>JEE Main - 2nd April 2017>Q 51

In the following reactions,

ZnO

is respectively acting as a/an,

(i)

ZnO + {Na}_{2} O \to {Na}_{2} {ZnO}_{2}

(ii)

ZnO + {CO}_{2} \to {ZnCO}_{3}

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 5 - Equilibrium>JEE Main - 2nd April 2017>Q 52

{pK}_{a}

of a weak acid

(HA)

and

{pK}_{b}

of a weak base

(BOH)

are

3.2

and

3.4

respectively. The

pH

of their salt

(AB)

solution at

25^{o} C

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 5 - Equilibrium>JEE Main - 27 July 2021 Shift 2>Q 53

The equilibrium constant for the reaction

A (s) ⇌ M (s) + \frac{1}{2} O_{2} (g)

K_{p} = 4 .

At equilibrium, the partial pressure of

O_{2}

is _____ atm. (Round off to the nearest integer)

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 5 - Equilibrium>JEE Main - 27 July 2021 Shift 1>Q 54

{PCl}_{5} ⇌ {PCl}_{3} + {Cl}_{2} K_{c} = 1.844

3.0

moles of

{PCl}_{5}

is introduced in a

1 L

closed reaction vessel at

380 K .

The number of moles of

{PCl}_{5}

at equilibrium is

— \times 10^{- 3}

(Round off to the Nearest Integer)

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 5 - Equilibrium>JEE Main - 27 August 2021 Shift 2>Q 55

When

5.1 g

of solid

{NH}_{4} HS

is introduced into a two litre evacuated flask at

27 ° C, 20 %

of the solid decomposes into gaseous ammonia and hydrogen sulphide. The

K_{p}

for the reaction at

27 ° C

x \times 10^{- 2}

. The value of

x

is (Integer answer)
[Given

1 R = 0.082 L atm K^{- 1} {mol}^{- 1}]

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 5 - Equilibrium>JEE Main - 27 August 2021 Shift 1>Q 56

The number of moles of

{NH}_{3},

that must be added to

2 L

0.80 {MAgNO}_{3}

in order to reduce the concentration of

{Ag}^{+}

ions to

5.0 \times 10^{- 8} M (K_{formation}

for

{[Ag {({NH}_{3})}_{2}]}^{+} = 1.0 \times 10^{8})

is __________. (Nearest integer)
[Assume no volume change on adding

{NH}_{3}

]

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 5 - Equilibrium>JEE Main - 26 Feb 2021 Shift 2>Q 57

The

pH

of ammonium phosphate solution, if

{pk}_{a}

of phosphoric acid and

{pk}_{b}

of ammonium hydroxide are

5.23

and

4.75

respectively, is

100 mL of 0.1 M HCl is taken in a beaker and to it 100 mL 0.1 M NaOH of is added in steps of 2 mL and the pH is continuously measured. Which of the following graphs correctly depicts the change in pH ?

Important Questions on Equilibrium

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$100 mL$ of $0.1 M HCl$ is taken in a beaker and to it $100 mL$ $0.1 M NaOH$ of is added in steps of $2 mL$ and the $pH$ is continuously measured. Which of the following graphs correctly depicts the change in $pH$ ?