Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 4

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The solubility curve of ${KNO}_{3}$ as a function of temperature is given below:

The amount of ${KNO}_{3}$ that will crystallize when a saturated solution of ${KNO}_{3}$ in $100 ml$ of water is cooled from $90 ° C$ to $30 ° C$ , is:

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Important Questions on Equilibrium

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Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 5

{CuSO}_{4} . 5 H_{2} O_{(s)} ⇌ {CuSO}_{4} . 3 H_{2} O_{(s)} + 2 H_{2} O_{(g)}

has

K_{p} = 1.086 \times 10^{- 4} {atm}^{2}

at

25 ° C

. The efflorescent nature of

{CuSO}_{4} . 5 H_{2} O

can be noticed when vapour pressure of

H_{2} O

in atmosphere as

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Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 6

Sulphide ions in alkaline solutions react with solid sulphur to form polyvalent sulphide ions. The equilibrium constant for the formation of

{S_{2}}^{2 -}

and

{S_{3}}^{2 -}

from

S

and

S^{2 -}

ions are

1.7

and

5.3

, respectively. The equilibrium constant for the formation of

{S_{3}}^{2 -}

from

{S_{2}}^{2 -}

and

S

is

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Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 7

Consider the system:

A_{(s)} ⇌ 2 B_{(g)} + 3 C_{(g)}

. If the concentration of

C

at equilibrium is increased by a factor

2

at new equilibrium, it will cause the equilibrium concentration of

B

to change to

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Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 8

The equilibrium constant,

K_{c}

for the reaction:

{[Ag {(CN)}_{2}]}^{-} ⇌ {Ag}^{+} + 2 {CN}^{-}

at

25 ° C

is

4.0 \times 10^{- 19}

. Then the silver ion concentration in a solution which was originally

0.1 M

in

KCN

and

0.03 M

in

{AgNO}_{3}

is

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Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 9

The graph given below relates ${lnK}_{eq .} and \frac{1}{T}$ for a reaction. The reaction must be

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Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 10

If pressure is applied to the equilibrium of

solid ⇌ liquid

. The melting point of the solid

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Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 11

Van't Hoff's equation giving the effect of temperature on chemical equilibrium is represented as

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Chemistry Crash Course NEET>Chapter 5 - Equilibrium>Level 3>Q 12

Equilibrium constant

K

at

27 ° C

is

30

and at

127 ° C

it is

40

. Then the ratio of activation energy

\frac{E_{a} (f)}{E_{a} (b)}

will be