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Q. No.Identify the correct statement for the equilibrium constant, Keq of a specific reaction:
1. It may be changed by the addition of a catalyst
2. It increases if the concentration of one of the products is increased
3. It changes with changes in the temperature
4. It increases if the concentration of one of the reactants is increased
Subtopic: Introduction To Equilibrium |
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An increase in temperature in an endothermic reversible reaction shifts the equilibrium:
1. Towards the reactant's side
2. Towards the product's side
3. Towards neither of the sides
4. Terminates the reaction
1. Towards the reactant's side
2. Towards the product's side
3. Towards neither of the sides
4. Terminates the reaction
Subtopic: Introduction To Equilibrium |
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An example of homogeneous equilibrium among the following is:
| 1. | \(2SO_{2 (g)} + O_{2(g)} \rightleftharpoons 2SO_3(g)\) |
| 2. | \(C_{(s) }+ H_2O_{(g)} \rightleftharpoons CO_{(g)} + H_{2(g)}\) |
| 3. | \(CaCO_{3(s)} \rightleftharpoons CaO_{(s)} + CO_{2(g)}\) |
| 4. | \(NH_4HS_{(s)} \rightleftharpoons NH_{3(s)} + H_2S_{(g)}\) |
Subtopic: Introduction To Equilibrium |
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Given below are the dissociation constant values of a few acids.
\(H_2SO_3 = 1.3 \times 10^{-2} , HNO_2= 4 \times 10^{-4}, \\ CH_3COOH = 1.8 \times 10^{-5}, HCN = 4 \times 10^{-10}\)
What is the increasing order of acidic strength among the following?
1. \(HCN < CH_3COOH < HNO_2 < H_2SO_3 \)
2. \( CH_3COOH < HNO_2 <HCN< H_2SO_3 \)
3. \( CH_3COOH <HCN< H_2SO_3<HNO_2 \)
4. \(HNO_2 < H_2SO_3 < CH_3COOH < HCN \)
\(H_2SO_3 = 1.3 \times 10^{-2} , HNO_2= 4 \times 10^{-4}, \\ CH_3COOH = 1.8 \times 10^{-5}, HCN = 4 \times 10^{-10}\)
What is the increasing order of acidic strength among the following?
1. \(HCN < CH_3COOH < HNO_2 < H_2SO_3 \)
2. \( CH_3COOH < HNO_2 <HCN< H_2SO_3 \)
3. \( CH_3COOH <HCN< H_2SO_3<HNO_2 \)
4. \(HNO_2 < H_2SO_3 < CH_3COOH < HCN \)
Subtopic: Ionisation Constant of Acid, Base & Salt |
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The relation between the equilibrium constants \(K_1 ~\text{and}~K_2\) for the following reactions is as:
\(\begin{aligned} & \mathrm{NO}(\mathrm{g})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g}) \stackrel{\mathrm{K}_1}{\rightleftharpoons} \mathrm{NO}_2(\mathrm{~g}) \text { and } \\ & 2 \mathrm{NO}_2(\mathrm{~g}) \stackrel{\mathrm{K}_2}{\rightleftharpoons} 2 \mathrm{NO}(\mathrm{g})+\mathrm{O}_2(\mathrm{~g}) \end{aligned}\)
1. \(K_2={1 \over K_1}\)
2. \(K_2={K_1 \over 2}\)
3. \(K_2={1 \over K_1^2}\)
4. \(K_2=K^2_1\)
\(\begin{aligned} & \mathrm{NO}(\mathrm{g})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g}) \stackrel{\mathrm{K}_1}{\rightleftharpoons} \mathrm{NO}_2(\mathrm{~g}) \text { and } \\ & 2 \mathrm{NO}_2(\mathrm{~g}) \stackrel{\mathrm{K}_2}{\rightleftharpoons} 2 \mathrm{NO}(\mathrm{g})+\mathrm{O}_2(\mathrm{~g}) \end{aligned}\)
1. \(K_2={1 \over K_1}\)
2. \(K_2={K_1 \over 2}\)
3. \(K_2={1 \over K_1^2}\)
4. \(K_2=K^2_1\)
Subtopic: Introduction To Equilibrium |
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Consider the following reversible chemical reactions:\(\begin{aligned} & \mathrm{A}_2(\mathrm{~g})+\mathrm{B}_2(\mathrm{~g}) \stackrel{\mathrm{K}_1}{\rightleftharpoons} 2 \mathrm{AB}(\mathrm{g}) .......(1) \\ & 6 \mathrm{AB}(\mathrm{g}) \stackrel{\mathrm{K}_2}{\rightleftharpoons} 3 \mathrm{~A}_2(\mathrm{~g})+3 \mathrm{~B}_2(\mathrm{~g}) . . ...(2) \end{aligned}\)
1. \( \mathrm{K}_1 \mathrm{~K}_2=\frac{1}{3}\)
2. \( \mathrm{~K}_2=\mathrm{K}_1^3 \)
3. \( \mathrm{~K}_2=\mathrm{K}_1^{-3} \)
4. \( \mathrm{~K}_1 \mathrm{~K}_2=3 \)
What is the relationship between \(\mathrm{K}_1\) and \(\mathrm{K}_2\)?
1. \( \mathrm{K}_1 \mathrm{~K}_2=\frac{1}{3}\)
2. \( \mathrm{~K}_2=\mathrm{K}_1^3 \)
3. \( \mathrm{~K}_2=\mathrm{K}_1^{-3} \)
4. \( \mathrm{~K}_1 \mathrm{~K}_2=3 \)
Subtopic: Kp, Kc & Factors Affecting them |
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The following reaction occurs in the Blast Furnace where iron ore is reduced to iron metal.
\(\mathrm{Fe}_2 \mathrm{O}_3(\mathrm{~s})+3 \mathrm{CO}(\mathrm{g}) \rightleftharpoons 2 \mathrm{Fe}(\mathrm{l})+3 \mathrm{CO}_2(\mathrm{~g})\)
Using Le Chatelier’s principle, predict which one of the following will not disturb the equilibrium:
\(\mathrm{Fe}_2 \mathrm{O}_3(\mathrm{~s})+3 \mathrm{CO}(\mathrm{g}) \rightleftharpoons 2 \mathrm{Fe}(\mathrm{l})+3 \mathrm{CO}_2(\mathrm{~g})\)
Using Le Chatelier’s principle, predict which one of the following will not disturb the equilibrium:
| 1. | \(\text {Removal of} ~\mathrm{CO} \) | 2. | \(\text {Removal of} ~\mathrm{CO_2}\) |
| 3. | \(\text {Addition of} ~\mathrm{CO_2}\) | 4. | \(\text {Addition of} ~\mathrm{Fe_2O_3}\) |
Subtopic: Le Chatelier's principle |
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Which of the following relations between the molar solubility ( S ) and the solubility product Ksp is correct for Zr3(PO4)4?
| 1. | \( \mathrm{S}=\left(\frac{\mathrm{K}_{s p}}{144}\right)^{1 / 6} \) | 2. | \( \mathrm{~S}=\left(\frac{\mathrm{K}_{s p}}{6912}\right)^{1 / 7}\) |
| 3. | \( \mathrm{~S}=\left(\frac{\mathrm{K}_{s p}}{929}\right)^{1 / 9} \) | 4. | \( \mathrm{~S}=\left(\frac{\mathrm{K}_{s p}}{216}\right)^{1 / 7} \) |
Subtopic: Solubility Product |
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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: 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: Acids & Bases - Definitions & Classification |
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