NCERT Exemplar (Objective) Based MCQs Equilibrium Chemistry NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

A. Liquid $⇌$ Vapour	1. Saturated solution
B. Solid $⇌$ Liquid	2. Boiling point
C. Solid $⇌$ Vapour	3. Sublimation point
D. Solute (s) $⇌$ Solute (solution)	4. Melting point
	5. Unsaturated solution

Codes

	A	B	C	D
1.	2	4	3	1
2.	1	2	3	5
3.	5	4	3	2
4.	4	5	3	2

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Subtopic: Introduction To Equilibrium |

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Q2:

Some reactions are written below in Column I and their equilibrium constants
in terms of K_c are written in Column II.
Match the following reactions with the corresponding equilibrium constant.

Column I (Reaction)	Column II (Equilibrium constant)
A. $2 N_{2} (g) + 6 H_{2} (g) ⇌ 4 {NH}_{3} (g)$	1. $2 K_{c}$
B. $2 {NH}_{3} (g) ⇌ N_{2} (g) + 3 H_{2} (g)$	2. $K_{c}^{1 / 2}$
C. $\frac{1}{2} N_{2} (g) + \frac{3}{2} H_{2} (g) ⇌ {NH}_{3} (g)$	3. $\frac{1}{K_{c}}$
	4. $K_{c}^{2}$

Codes

	A	B	C
1.	4	3	2
2.	1	2	3
3.	1	4	3
4.	4	1	3

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Subtopic: Kp, Kc & Factors Affecting them |

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Q3:

Match the standard free energy of the reaction with the corresponding equilibrium constant.

A. $∆ G^{⊝} > 0$	1. K>1
B. $∆ G^{⊝} < 0$	2. K=1
C. $∆ G^{⊝} = 0$	3. K=0
	4. K<1

Codes

	A	B	C
1.	4	1	2
2.	1	2	3
3.	2	4	3
4.	4	1	3

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Subtopic: Kp, Kc & Factors Affecting them |

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Q4:

Match the following species with the corresponding conjugate acid.

Species	Conjugate acid
A. $N H_{3}$	1. $C O_{3}^{2 -}$
B. $H C O_{3}^{-}$	2. $N H_{4}^{+}$
C. $H_{2} O$	3. $H_{3} O^{+}$
D. $H S O_{4}^{-}$	4. $H_{2} C O_{3}$
	5. $H_{2} S O_{4}$

Codes

	A	B	C	D
1.	2	5	1	5
2.	2	4	3	5
3.	5	4	3	2
4.	4	5	3	2

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Subtopic: Acids & Bases - Definitions & Classification |

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Q5:

A	B
A.	i. Variation in product concentration with time.
B.	ii. Reaction at equilibrium
C.	iii. Variation in reactant concentration with time.

Match the graphical variations with their descriptions given above and identify the correct codes below:

	A	B	C
1.	i	iii	ii
2.	i	ii	iii
3.	iii	ii	i
4.	iii	i	ii

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Subtopic: Kp, Kc & Factors Affecting them |

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Q6:

Match the Column I with Column II

Column I	Column II
A. Equilibrium	1. $∆ G > 0, K < 1$
B. Spontaneous reaction	2. $∆ G = 0$
C. Non-spontaneous reaction	3. $∆ G < 0, K > 1$

Codes

Options:	A	B	C
1.	2	3	1
2.	1	2	3
3.	2	1	3
4.	3	1	2

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Subtopic: Kp, Kc & Factors Affecting them |

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Q7:

Given below are two statements:

Assertion (A):	The increasing order or acidity of hydrogen halides is HF<HCI<HBr<HI.
Reason (R):	While comparing acids formed by the elements belonging to the same group of the periodic table, H-A bond strength is a more important factor in determining the acidity of an acid than the polar nature of the bond.

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.

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Subtopic: Acids & Bases - Definitions & Classification |

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Q8:

Given below are two statements:

Assertion (A):	A solution containing a mixture of acetic acid and sodium acetate maintains a constant value of pH on the addition of small amounts of acid or alkali.
Reason (R):	A solution containing a mixture of acetic acid and sodium acetate acts as a buffer solution.

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.

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Subtopic: Buffer |

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Q9:

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.

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Subtopic: Common Ion Effect |

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Q10:

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.