The following pair constitutes a buffer is:

1. HNO2 and NaNO2

2. NaOH and NaCl

3. HNO3 and NH4NO3

4. HCl and KCl

Subtopic:  Buffer |
 66%
From NCERT
AIPMT - 2006
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which composition will make the basic buffer?

1. 100 mL of 0.1 M HCl+100 mL of 0.1 M NaOH
2. 50 mL of 0.1 M NaOH+25 mL of 0.1 M CH3COOH
3. 100 mL of 0.1 M CH3COOH+100 mL of 0.1 M NaOH
4. 100 mL of 0.1 M HCl+200 mL of 0.1 M NH4OH
Subtopic:  Buffer |
 60%
From NCERT
NEET - 2019
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

pH of a saturated solution of CaOH2 is 9. The solubility product Ksp of CaOH2 is:

1. 0.5×10-10

2. 0.5×10-15

3. 0.25×10-10

4. 0.125×10-15

Subtopic:  pH calculation |
 66%
From NCERT
NEET - 2019
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The conjugate bases of Bronsted acids H2O and HF are respectively:

1. H3O+ and H2F+, respectively.

2. OH- and H2F+, respectively.

3. H3O+ and F-, respectively.

4. OH- and F-, respectively.

Subtopic:  Acids & Bases - Definitions & Classification |
 72%
From NCERT
NEET - 2019
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The solubility product of AgI at 25°C is 1.0 × 10–16 mol2L–2. The solubility if AgI in 10–4 N solution of KI at 25°C is approximately :
(in mol L–1)
1. 1.0 × 10–8

2. 1.0 × 10–16

3. 1.0 × 10–12

4. 1.0 × 10–10

Subtopic:  Solubility Product |
 77%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

1. HOCl<HOClO<HOClO2<HOClO3

2. HOClO<HOCl<HOClO3<HOClO2

3. HOClO2<HOClO3<HOClO<HOCl

4. HOClO3<HOClO2<HOClO<HOCl

Subtopic:  Acids & Bases - Definitions & Classification |
 87%
From NCERT
AIPMT - 2007
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The following equilibrium constants are given: 
N2 + 3H2 ⇌ 2NH3K1 
N2 + O⇌ 2NO; K2 
H2 + 1/2O2 ⇌ H2O; K3 

The equilibrium constant for the oxidation of NH3 by oxygen to give NO is:

1. K2K33/K1

2. K2K32/K1

3. K22K3/K1

4. K1K2/K3 

Subtopic:  Kp, Kc & Factors Affecting them |
 67%
From NCERT
AIPMT - 2007
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The value of KP1 and Kp2 for the reactions
 X  Y +Z ......(i)
and A 2B ......(ii)
are in the ratio of 9 : 1. If the degree of dissociation of X and A is equal, then the total pressure at equilibrium(i) and (ii) are in the ratio:

1. 3 : 1

2. 1 : 9

3. 36 : 1

4. 1 : 1

Subtopic:  Kp, Kc & Factors Affecting them |
 61%
From NCERT
AIPMT - 2008
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The dissociation equilibrium of a gas AB2 can be represented as 
 2AB2(g)  2AB(g) + B2(g) 
The degree of dissociation is ‘x’ and is small compared to 1. The expression relating the degree of dissociation (x) with equilibrium constant KP and total pressure p is:
1. (2KP/p)
2. (2Kp /p)1/3
3. (2KP/p)1/2
4. (KP/P)

Subtopic:  Kp, Kc & Factors Affecting them |
 69%
From NCERT
AIPMT - 2008
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

If the concentration of OH ' ions in the reaction 

Fe(OH)3(s)   Fe3+(aq) + 3OH-(aq)is 
decreased by 14 times, then the equilibrium concentration of Fe3+ will increase by:

1. 8 times

2. 16 times

3. 64 times

4. 4 times

Subtopic:  Introduction To Equilibrium |
 80%
AIPMT - 2008
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints