The molar solubility of CaF2 (Ksp=5.3 x 10-11) in 0.1 M solution of NaF will be:

1. 5.3 x 10-11 mol L-1

2. 5.3 x 10-8 mol L-1

3. 5.3 x 10-9 mol L-1

4. 5.3 x 10-10 mol L-1

Subtopic:  Solubility Product |
 65%
From NCERT
NEET - 2019
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Which of the following cannot act both as a Bronsted acid and as a Bronsted base?

1. HCO3-

2. NH3

3. HCl

4. HSO4-

Subtopic:  Acids & Bases - Definitions & Classification |
 71%
From NCERT
NEET - 2019
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The pH of a 0.01 M NaOH (aq) solution will be:

1. 7.01

2. 2

3. 12

4. 9

Subtopic:  pH calculation |
 80%
From NCERT
NEET - 2019
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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
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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
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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
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The hydrogen ion concentration of a 10-8 M HCl aqueous solution at 298 K (Kw = 10-14) is:

1. 1.0×10-6 M

2. 1.0525×10-7 M

3. 9.525×10-8 M

4. 1.0×10-8 M

Subtopic:  pH calculation |
 52%
From NCERT
AIPMT - 2006
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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
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For the reaction, 
CH4(g) + 2O2(gCO2(g) + 2H2O(l
ΔrH = -170.8 kJ mol-1 
Which of the following statements is not true?
 

1. At equilibrium, the concentration of \(\mathrm{CO}_2 \mathrm{~g}\) and water (l) are not equal.
2. The equilibrium constant for the reaction is given by \(K_p=\frac{\left[\mathrm{CO}_2\right]}{\left[\mathrm{CH}_4\right]\left[\mathrm{O}_2\right]}\)
3. The addition of  \(\mathrm{CH}_4 \mathrm{~g} \) or \(\mathrm{O}_2 \mathrm{~g}\)  at equilibrium will cause a shift to the right
4. The reaction is exothermic

Subtopic:  Kp, Kc & Factors Affecting them |
 67%
From NCERT
AIPMT - 2006
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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
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