Q. No.Which substances listed below would form acidic solutions?
(I) NH4Cl
(II) K2CO3
(III) NaF
1. I only
2. II only
3. III only
4. II and III
(I) NH4Cl
(II) K2CO3
(III) NaF
1. I only
2. II only
3. III only
4. II and III
Subtopic: Â Acids & Bases - Definitions & Classification |
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Which of the following is the conjugate acid of \(\mathrm{NH}_2^{-}\) ?
1. \( \mathrm{NH}_3\)
2. \( \mathrm{NH}_2 \mathrm{OH} \)
3. \( \mathrm{NH}_4^{+} \)
4. \(\mathrm{N}_2 \mathrm{H}_4 \)
1. \( \mathrm{NH}_3\)
2. \( \mathrm{NH}_2 \mathrm{OH} \)
3. \( \mathrm{NH}_4^{+} \)
4. \(\mathrm{N}_2 \mathrm{H}_4 \)
Subtopic: Â Acids & Bases - Definitions & Classification |
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Match the entries in Column-I with Column-II:
1. A-q, B-p, C-r, D-s
2. A-p, B-q, C-r, D-s
3. A-s, B-q, C-r, D-p
4. A-q, B-s, C-r, D-q
| Column-I | Column-II | ||
| (A) | Weak electrolytes | (p) | Electron pair donor |
| (B) | Lewis base | (q) | Partial ionization |
| (C) | pKa | (r) | \(-log K_a\) |
| (D) | Indicator | (s) | Changes color at endpoint |
1. A-q, B-p, C-r, D-s
2. A-p, B-q, C-r, D-s
3. A-s, B-q, C-r, D-p
4. A-q, B-s, C-r, D-q
Subtopic: Â Ionisation Constant of Acid, Base & Salt |Â Acids & Bases - Definitions & Classification |Â Buffer |
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The given reaction:
\(NaOH\ + \ HCl\ \rightarrow \ NaCl \ +\ H_2O\) is an example of:
1. Intramolecular redox reaction
2. Disproportionation reaction
3. Acid-base reaction
4. Decomposition reaction
\(NaOH\ + \ HCl\ \rightarrow \ NaCl \ +\ H_2O\) is an example of:
1. Intramolecular redox reaction
2. Disproportionation reaction
3. Acid-base reaction
4. Decomposition reaction
Subtopic: Â Acids & Bases - Definitions & Classification |
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Level 1: 80%+
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Subtopic: Â Acids & Bases - Definitions & Classification |
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Which of the following molecules acts as a Lewis acid?
1. (CH3)3B
2. (CH3)2O
3. (CH3)3P
4. (CH3)3N
Subtopic: Â Acids & Bases - Definitions & Classification |
 86%
Level 1: 80%+
AIPMT - 2009
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Which of the following sets represents the correct order of acidity among the given compounds?
| 1. | \(\mathrm{HClO}<\mathrm{HClO}_2<\mathrm{HClO}_3<\mathrm{HClO}_4\) |
| 2. | \(\mathrm{HClO}_4<\mathrm{HClO}_3<\mathrm{HClO}_2<\mathrm{HClO} \) |
| 3. | \( \mathrm{HClO}<\mathrm{HClO}_4<\mathrm{HClO}_3<\mathrm{HClO}_2\) |
| 4. | \(\mathrm{HClO}_4<\mathrm{HClO}_2<\mathrm{HClO}_3<\mathrm{HClO} \) |
Subtopic: Â Acids & Bases - Definitions & Classification |
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If a weak base has the dissociation constant, , then the value of the dissociation constant, , of its conjugate acid is given by:
1.
2.
3.
4.
Subtopic: Â Acids & Bases - Definitions & Classification |
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Subtopic: Â Acids & Bases - Definitions & Classification |
 83%
Level 1: 80%+
AIPMT - 2010
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It is found that 0.01 M solution of four sodium salts NaA, NaB, NaC and NaD have the following pH values :
(i) NaD = 10.0
(ii) NaC = 9.0
(iii) NaB = 8.0
(iv) NaA = 7.0
Which of the corresponding acids is strongest?
1. HA
2. HB
3. HC
4. HD
(i) NaD = 10.0
(ii) NaC = 9.0
(iii) NaB = 8.0
(iv) NaA = 7.0
Which of the corresponding acids is strongest?
1. HA
2. HB
3. HC
4. HD
Subtopic: Â Acids & Bases - Definitions & Classification |Â pH calculation |
 85%
Level 1: 80%+
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