The concentration vs time graph for the Haber process is given below:

Which of the following curves represents the hydrogen gas?`
 

1. Y

2. Z

3. X

4. In the Haber process, hydrogen gas is not used

Subtopic:  Introduction To Equilibrium |
 68%
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In the reaction \(\mathrm{H}_2+\mathrm{I}_2 \rightleftharpoons 2 \mathrm{HI}\)\(\mathrm{H}_2\) has been added at equilibrium, as depicted in the following graph:


The point that represents the re-established equilibrium is:

1. A

2. B

3. C

4. None of the above.

Subtopic:  Introduction To Equilibrium |
 68%
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Assertion (A): When Cu (II) and sulphide ions are mixed, they react together extremely quickly to give a solid.
Reason (R): The equilibrium constant of Cu2+(aq) +  S2- (aq)   ⇋   CuS(s)   is high because the solubility product is low.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A)
2. Both (A) and (R) are False.
3. (A) is True but (R) is False.
4. Both (A) and (R) are True but (R) is not the correct explanation of (A)
Subtopic:  Solubility Product |
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Consider the following graph:

  

The point that represents reaction in equilibrium is:

1. C

2. A

3. B

4. D

Subtopic:  Introduction To Equilibrium |
 53%
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Assertion (A): For an exothermic reaction, the value of Kc decreases on increasing the temperature. 
Reason (R): Rate constant for a backward reaction increases more than the increase in the rate constant for a forward reaction.
 

1.
Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.
Subtopic:  Kp, Kc & Factors Affecting them |
 73%
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Given below are two statements: 

Assertion (A): In the dissociation of PCl5 at constant pressure and temperature, the addition of helium at equilibrium increases the dissociation of PCl5.
Reason (R): Helium reacts with Cl2 .
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False but (R) is True.

Subtopic:  Kp, Kc & Factors Affecting them |
 72%
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Assertion (A): An aqueous solution of ammonium acetate can act as a buffer.
Reason (R): Acetic acid is a weak acid and  NH4OH  is a weak base.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False but (R) is True.
Subtopic:  Buffer |
 54%
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Given below are two statements: 

Assertion (A): An aqueous solution of ammonium carbonate is basic.
Reason (R):

The acidic or basic nature of a salt solution of a salt of a weak acid and a weak base depends on the Ka and Kb values of the acid and the base forming it.

 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False but (R) is True.
Subtopic:  pH calculation |
 62%
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Assertion (A): For any chemical reaction at a particular temperature, the equilibrium constant is fixed and is a characteristic property.
Reason (R): Equilibrium constant is independent of temperature.

  

1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False but (R) is True.

Subtopic:  Kp, Kc & Factors Affecting them |
 86%
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Given below are two statements: 

Assertion (A): The ionisation of hydrogen sulphide in water is low in the presence of hydrochloric acid.
Reason (R): Hydrogen sulphide is a weak acid.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False but (R) is True.
Subtopic:  Common Ion Effect |
 55%
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