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Q. No.What is the pH of a solution obtained by mixing 50 mL of water with 50 mL of a 1×10-3 M barium hydroxide solution?
1. 3.0
2. 3.3
3. 11.0
4. 11.7
Subtopic: pH calculation |
59%
Level 3: 35%-60%
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The strongest conjugate base is:
\(1.~CH_3COO^-\\ \\ 2.~Cl^-\\ \\ 3. \ NO^-_3\\ \\ 4. ~HSO^-_4 \)
\(1.~CH_3COO^-\\ \\ 2.~Cl^-\\ \\ 3. \ NO^-_3\\ \\ 4. ~HSO^-_4 \)
Subtopic: Acids & Bases - Definitions & Classification |
80%
Level 1: 80%+
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The pKb of dimethylamine and pka of acetic acid are 3.27 and 4.77 respectively at T (K).
The correct option for the pH of dimethylammonium acetate solution is:
| 1. | 7.75 | 2. | 6.25 |
| 3. | 8.50 | 4. | 5.50 |
Subtopic: Salt Hydrolysis & Titration |
65%
Level 2: 60%+
NEET - 2021
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100 ml of \(HCl\) (pH=1) is mixed with 150 ml of \(HCl\) (pH =2). The pH of the resulting solution will be:
(log 4.6 = 0.65)
1. 1.35
2. 1.5
3. 1.8
4. 1.9
(log 4.6 = 0.65)
1. 1.35
2. 1.5
3. 1.8
4. 1.9
Subtopic: pH calculation |
78%
Level 2: 60%+
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For the reversible reaction \(N_2(g)+3H_2(g)⇌2NH_3(g)\), what is the effect on the equilibrium position when an inert gas is added at constant volume?
| 1. | Shifts in the forward reaction |
| 2. | Shifts in backward reaction |
| 3. | Remains unaffected |
| 4. | Initially in the forward direction and then in the backward direction |
Subtopic: Le Chatelier's principle |
86%
Level 1: 80%+
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For the reaction,
\(H_2NCOONH_4 (s) \rightleftharpoons2 NH_3(g) + CO_2(g)\), the total pressure at equilibrium is 15 atmospheres. It can be concluded that the value of \(K_P\) will be:
1. 15 atm3
2. 50 atm3
3. 500 atm3
4. 100 atm3
\(H_2NCOONH_4 (s) \rightleftharpoons2 NH_3(g) + CO_2(g)\), the total pressure at equilibrium is 15 atmospheres. It can be concluded that the value of \(K_P\) will be:
1. 15 atm3
2. 50 atm3
3. 500 atm3
4. 100 atm3
Subtopic: Kp, Kc & Factors Affecting them |
72%
Level 2: 60%+
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The ionization constant of acetic acid is \(1.74 × 10^{–5}.\) The pH of acetic acid in its 0.05 M solution will be:
1. 7.81
2. 3.03
3. 8.54
4. 1.45
Subtopic: Ionisation Constant of Acid, Base & Salt | pH calculation |
74%
Level 2: 60%+
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What are the conjugate bases of the Brönsted acids \(\mathrm{H}_2 \mathrm{SO}_4\), and \(\mathrm{HCO}_3^{-}\) respectively?
1. \(\mathrm{HSO}_4^{-}, \mathrm{CO}_3^{2-}\)
2. \(\mathrm{HSO}_4^{-}, \mathrm{CO}_3^{-}\)
3. \(\mathrm{SO}_4^{2-}, \mathrm{CO}_3{ }^{2-}\)
4. \(\mathrm{HS}_2 \mathrm{O}_4{ }^{-}, \mathrm{CO}_3{ }^{2-}\)
1. \(\mathrm{HSO}_4^{-}, \mathrm{CO}_3^{2-}\)
2. \(\mathrm{HSO}_4^{-}, \mathrm{CO}_3^{-}\)
3. \(\mathrm{SO}_4^{2-}, \mathrm{CO}_3{ }^{2-}\)
4. \(\mathrm{HS}_2 \mathrm{O}_4{ }^{-}, \mathrm{CO}_3{ }^{2-}\)
Subtopic: Acids & Bases - Definitions & Classification |
86%
Level 1: 80%+
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Given below are two statements:
| Assertion (A): | If Qp<Kp, reaction moves in the direction of reactants. |
| Reason (R): | The reaction quotient is defined in the same way as the equilibrium constant at any stage of the 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. | (A) is False but (R) is True. |
Subtopic: Introduction To Equilibrium |
76%
Level 2: 60%+
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Initially 2 moles of \(NOCl \) taken in 1 L of closed container and it dissociates into NO and Cl2 gas.
The reaction is as follows:
\(2 \mathrm{NOCl}(g) \rightleftharpoons 2 \mathrm{NO}(g)+\mathrm{Cl}_2(g)\)
Calculate the equilibrium constant Kc given that 0.4 moles of NO is obtained at equilibrium.
The reaction is as follows:
\(2 \mathrm{NOCl}(g) \rightleftharpoons 2 \mathrm{NO}(g)+\mathrm{Cl}_2(g)\)
Calculate the equilibrium constant Kc given that 0.4 moles of NO is obtained at equilibrium.
| 1. | 142 × 10-4 | 2. | 142 × 10-6 |
| 3. | 125 × 10-4 | 4. | 130 × 104 |
Subtopic: Introduction To Equilibrium |
85%
Level 1: 80%+
JEE
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