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Chemistry

Equilibrium

Solution for Class 12, Chemistry, Equilibrium

Question 1

decrease in vapour pressure will be in ordelyte, relative

$A < B < C < D$
$D < A < B < C$
$D < C < B < A$
equal

Topic:

Equilibrium

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Question 2

Q.3 The INCORRECT statement among the following, for this reaction, is

Decrease in the total pressure will return in formation of more moles of gaseous $X$
At the start of the reaction, dissociation of gaseous $X_{2}$ takes place spontaneously
$β_{manis} = 0.7$
$K < 1$

Topic:

Equilibrium

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Question 3

Q.7 The solubility of a salt of weak acid

(A B)

pH 3

Y \times 1 0^{- 3} mol L^{- 1}

. The value of

Y

is (Given that the value of solubility product of

A B (K_{s p}) = 2 \times 1 0^{- 10}

and the value of ionization constant of

H B (K_{a}) = 1 \times 1 0^{- 8})

Topic:

Equilibrium

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Question 4

Consider the reaction

A ⇌ B

1000 K

. At time th, the temperature of the system was increased to

2000 K

and the system was allowed to reach equilibrium. Throughout this experiment the partial pressure of

A

was maintained at I bar. Given below is the ploc of the partial pressure of B with time. What is the ratio of the standard Gibbs energy of the reaction at

1000 K

to thut at

2000 K

? [JEE(Advanced) - 20209]

Topic:

Equilibrium

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Question 5

The degree of dissociation of

I_{2}

molecule of

100 0^{\circ} C

and under atmospheric pressure is

40%

b volume. If the dissociation is reduced to

20%

at the same temp. total equilibrium pressure o the gas is :

$1.57 atm$
$2.57 atm$
$3.57 atm$
$4.57 atm$

Topic:

Equilibrium

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Question 6

Determine the value of equilibrium constant

(K_{c})

for the reaction

A_{2} (g) + B_{2} (g) ⇌ 2 A B (g)

If 10 moles of

A_{2}; 15

moles of

B_{2}

and 5 moles of

A B

are placed in a 2 litre vessel and allowed t come to equilibrium. The final concentration of

A B

7.5 M

$4.5$
$1.5$
$0.6$
None of these

Topic:

Equilibrium

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Question 7

Which of the following cannot act both as Bronsted acid and as Bronsted base ?

$HCO_{3}^{-}$
$NH_{3}$
$HCl$
$HSO_{4}^{-}$ (Odisha NEET)

Topic:

Equilibrium

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Question 8

(J & K CET)

(AllMS) tant concentration 2016 87. Which of the following fluoro-compounds is most likely to behave as a Lewis base?

$PF_{3}$
$BF_{3}$
$CF_{4}$

Topic:

Equilibrium

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Question 9

mene lenperinre, shar is ute acu ralue of the rapio of

\frac{P _{SO_{2}}}{P _{SO}}

ar equilibrium?

Topic:

Equilibrium

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Question 10

na ≃

56. At a certain temperature, the degree of dissociation of

PCl_{5}

was found to be

0.25

under a total pressure of

15 atm

. The value of

Kp

for the dissociation of

PCl_{5}

1
$0.25$
$0.5$
$0.75$

Topic:

Equilibrium

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Question 11

At constant temperature

80% AB

dissociates into

A_{2}

and

B_{2^{'}}

then the equilibrium constant for

2 AB (g) ⇌ A_{2 (g)} + B_{2 (g)}

1
$0.25$
16
4

Topic:

Equilibrium

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Question 12

A

and

C

are equal equilibrium concentration

$0.08$
$1/8$
8
80

Topic:

Equilibrium

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Question 13

At constant temperature

80% AB

dissociates into

A_{2}

and

B_{2}

, then the equilibrium constant for

2 A B (g) ⇌ A_{2 (g)} + B_{2 (g)}

1
$0.25$
16
4

Topic:

Equilibrium

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Question 14

The

pH

at the second equivalent point of

30 ml

0.124 M H_{3} PO_{3} (K_{a_{2}} = 2.6 \times 1 0^{- 7})

is tritated with

0.1 M NaOH

solution is [Given

lo g 26 = 1.415, lo g 35.6 = 1.5514

]

$10.57$
$11.57$
$9.57$
$12.57$

Topic:

Equilibrium

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Question 15

The

pH

at the second equivalent point of

30 ml

0.124 M H_{3} PO_{3} (K_{a_{2}} = 2.6 \times 1 0^{- 7})

is tritated with

0.1 M NaOH

solution is [Given

lo g 26 = 1.415, lo g 35.6 = 1.5514

]

$10.57$
$11.57$
$9.57$
$12.57$

Topic:

Equilibrium

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Question 16

Problem 7.1 The following concentrations were obtained for the formation of

NH_{3}

from

N_{2}

and

H_{2}

at equilibrium at

500 K

[N_{2}] = 1.5 \times 1 0^{- 2} M . [H_{2}] = 3.0 \times 1 0^{- 2} M

and

[NH_{3}] = 1.2 \times 1 0^{- 2} M

. Calculate equilibrium constant.

Topic:

Equilibrium

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Question 17

pH

1 0^{- 6} M HC (

aq.

) s : Y H_{2} O \to [H^{+}] = 1 0^{- 7} M = mol

just less than 6
just greater than 6
exactly equal to 6
just less than 7

Topic:

Equilibrium

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Question 18

Problem 7.6 The value of

K_{p}

for the reaction,

CO_{2} (g) + C (s) ⇌ 2 CO (g)

3.0

1000 K

. If initially

P_{CO_{2}} = 0.48 bar

and

P_{CO} = 0

bar and pure graphite is present, calculate the equilibrium partial pressures of

CO

and

CO_{2}

Topic:

Equilibrium

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Question 19

(NEET Karnataka) 203. What will be the solubility product of

A X

$27 5^{4}$
$4. S^{3}$
$36 5^{4}$
$9 S^{'}$

Topic:

Equilibrium

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Question 20

204. The solubility of

Fe (OH)_{3}

x mol L^{- 1}

. Its

K_{p}

would be

$9 x^{3}$
$3 x^{4}$
$27 x^{4}$
$1 = 9 x^{4}$

Topic:

Equilibrium

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Solution for Class 12, Chemistry, Equilibrium

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