The exothermic formation of ClF 3 is represented by the following equation: Cl 2 g + 3 F 2 g ⇌ 2 ClF 3 g ; ΔH = - 329 kJ Which of the following will increase the quantity of ClF 3 in the equilibrium mixture of Cl 2 , F 2 and ClF 3 ?

Increasing the volume of the container.

MEDIUM

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IMPORTANT

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What can be the maximum concentration of equimolar solutions of ferrous sulphate $({FeSO}_{4})$ and sodium sulphide $({Na}_{2} S),$ so that when mixed in equal volumes, there is no precipitation of iron sulphide ( $FeS$ ) (For iron sulphide, $K_{sp} = 6.25 \times 10^{- 18}$ ) Assume no ion to be undergoing hydrolysis.

Important Questions on Equilibrium

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 103

Solubility product of silver chloride and silver thiocyanate are

1.2 \times 10^{- 10}

and

7.1 \times 10^{- 13}

respectively. The equilibrium constant for the reaction

AgCl (s) + {CNS}^{- 1} (aq) ⇌ AgCNS (s) + {Cl}^{- 1} (aq)

is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 104

If a weak base has the dissociation constant,

K_{b}

, then the value of the dissociation constant,

K_{a}

, of its conjugate acid is given by:

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 105

A water sample from a municipal water supply was found to have a

pH = 7.0

. On evaporating

2 L

of this water,

2.016 g

of white solid was left behind in the evaporation vessel, i.e., the total dissolved solid

(TDS)

content of this water was

1008 mg

L^{- 1}

. However, addition of soap to a bucket of this water did not produce any visible scum. Based on these findings, one can conclude that:

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 106

50 m l

solution of

p H = 1

is mixed with a

50 m l

solution of

p H = 2

. The

p H

of the mixture will be nearly -

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 107

The solubility products

(K_{sp})

of three salts

MX, {MY}_{2}

and

{MZ}_{3}

are

2 \times 10^{- 8}, 8 \times 10^{- 9}

and

54 \times 10^{- 8}

respectively. The correct order for solubilities of these salts is

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 108

If the solubility product of iron

(III)

hydroxide is

1.8 \times 10^{- 37}

, the

pH

of a saturated solution of iron

(III)

hydroxide in distilled water is close to:

HARD

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 110

The colour changes of an indicator $Hln$ in acid base titrations is given below,

$HIn (aq) ⇌ H^{+} (aq) + \ln^{-} (aq)$

colour $X$ colour $Y$

Which of the following statements is correct?

HARD

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-2>Q 112

One mole of a sparingly soluble salt

MX

are added in

1 L

saturated solution of another sparingly soluble salt

NX

. If

K_{sp} (MX) > > K_{sp} (NX),

then: (Assume no chemical reaction to be taking place).

What can be the maximum concentration of equimolar solutions of ferrous sulphate FeSO4 and sodium sulphide Na2S, so that when mixed in equal volumes, there is no precipitation of iron sulphide (FeS) (For iron sulphide, Ksp=6.25×10-18 ) Assume no ion to be undergoing hydrolysis.

Important Questions on Equilibrium

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