In a qualitative analysis, \(Bi^{3+}~\) is detected by appearance of precipitate of \(BiO(OH)(s)~\). Calculate pH when the following equilibrium exists at 298 K :
\(BiO(OH)(s) \rightleftharpoons BiO^+(aq) + OH^-(aq)~\),
\(K = 4 \times 10^{-10}\)
(Given : \(\log 2 = 0.3010~\))
1. 4.699
2. 5.286
3. 8.714
4. 9.301
\(BiO(OH)(s) \rightleftharpoons BiO^+(aq) + OH^-(aq)~\),
\(K = 4 \times 10^{-10}\)
(Given : \(\log 2 = 0.3010~\))
1. 4.699
2. 5.286
3. 8.714
4. 9.301
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Match List-I with List-II:
Choose the correct answer from the options given below:
1. A - I, B - III, C -IV, D - II
2. A - II, B - IV, C - III, D - I
3. A - II, B - III, C - IV, D - I
4. A - II, B - III, C - I, D - IV
| List-I | List-II | ||
| A. |  |
I. | (i) Oleum; (ii) NaOH, \(\Delta~\); (iii) \(H^+~\) |
| B. |  |
II. | (i) \(O_2~\); (ii) \(H_2O/H^+\) |
| C. |  |
III. | (i) \(CH_3OH, H^+; ~~\) (ii) \(H_2, \text{catalyst}~\) |
| D. |  |
IV | (i) conc. \(H_2SO_4, \Delta;~\) (ii) \(H^+/H_2O~\) |
Choose the correct answer from the options given below:
1. A - I, B - III, C -IV, D - II
2. A - II, B - IV, C - III, D - I
3. A - II, B - III, C - IV, D - I
4. A - II, B - III, C - I, D - IV
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A bulb is rated at 150 watt, converting 8% energy into light. If energy of one photon is \(4.42 \times 10^{-19} \mathrm{~J}\), how many photons are emitted by
the bulb per second?
1. \(27.2 \times 10^{19}~\)
2. \(4.06 \times 10^{19}~\)
3. \(1.35 \times 10^{19}~\)
4. \(2.17 \times 10^{19}~\)
the bulb per second?
1. \(27.2 \times 10^{19}~\)
2. \(4.06 \times 10^{19}~\)
3. \(1.35 \times 10^{19}~\)
4. \(2.17 \times 10^{19}~\)
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The pair of molecules that are metamers among the following is :
| 1. | \(CH_3OCH_2CH_2CH_3~\) and \(CH_3CH_2OCH_2CH_3~\) |
| 2. | \(CH_3CH_2CH_2OH\) and \(CH_3 - CH(OH) - CH_3\) |
| 3. | \(CH_3CH_2CH_2CH_2CH_3~\) and \((CH_3)_2CHCH_2CH_3~\) |
| 4. |  |
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Identify the correct statements :
Choose the correct answer from the options given below :
1. A, B and C only
2. A, D and E only
3. A and B only
4. A and C only
| A. | The molality of 2.5 g of ethanoic acid (Molar mass : 60 g mol-1) in 75 g of benzene solution is 0.556 m. |
| B. | The molarity of a solution containing 5 g of NaOH (molar mass : 40 g mol-1) in 450 mL of solution is 0.278 M at 298 K. |
| C. | Aquatic species are more comfortable in cold water. |
| D. | The solubility of gas increases with decrease in pressure. |
| E. | For a binary mixture of A and B, the number of moles of A and B are nA and nB respectively. The mole fraction of B will be \(x_B=\dfrac{n_A}{n_A+n_B}\) |
Choose the correct answer from the options given below :
1. A, B and C only
2. A, D and E only
3. A and B only
4. A and C only
Level 4: Below 35%
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Which one of the following is an ambidentate ligand?
1. Oxalate
2. Ethane-1,2-diamine
3. Thiocyanate
4. Ethylenediaminetetraacetate ion
1. Oxalate
2. Ethane-1,2-diamine
3. Thiocyanate
4. Ethylenediaminetetraacetate ion
Level 4: Below 35%
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The functional group that can be identified through phthalein dye test is:
1. Carboxylic acid
2. Alcohol
3. Aldehyde
4. Phenolic
1. Carboxylic acid
2. Alcohol
3. Aldehyde
4. Phenolic
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Match List-I with List-II:
Choose the correct answer from the options given below :
1. A-IV, B-I, C-III, D-II
2. A-III, B-IV, C-II, D-I
3. A-II, B-III, C-I, D-IV
4. A-I, B-II, C-IV, D-III
| List-I | List-II | ||
| A. | \(C_2H_4\) | I. | \(3 ~\sigma\) bonds, \(2~\pi\) bonds |
| B. | \(C_2H_2\) | II. | \(3 ~\sigma\) bonds, one lone pair |
| C. | \(CH_4\) | III. | \(4 ~\sigma\) bonds |
| D. | \(NH_3\) | IV. | \(5 ~\sigma\) bonds, \(1~\pi\) bond |
Choose the correct answer from the options given below :
1. A-IV, B-I, C-III, D-II
2. A-III, B-IV, C-II, D-I
3. A-II, B-III, C-I, D-IV
4. A-I, B-II, C-IV, D-III
Subtopic: Hybridisation & Structure of Carbon Compounds |
89%
Level 1: 80%+
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A solution of copper sulphate is electrolysed for 10 minutes with a current of 1.5 amperes. The mass of copper deposited at cathode is:
(Given : Molar mass of Cu = 63 g mol-1; 1 F = 96487 C mol-1)
1. 0.2938 g
2. 0.5876 g
3. 2.4036 g
4. 1.7018 g
(Given : Molar mass of Cu = 63 g mol-1; 1 F = 96487 C mol-1)
1. 0.2938 g
2. 0.5876 g
3. 2.4036 g
4. 1.7018 g
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Match the following:
Choose the correct answer from the options given below :
1. A-II, B-III, C-IV, D-I
2. A-I, B-II, C-III, D-IV
3. A-II, B-III, C-I, D-IV
4. A-IV, B-II, C-III, D-I
| List-I (Quantum Numbers) |
List-II (Orbital) |
|||
| 'n' | 'l' | |||
| A. | 2 | 1 | I. | 3d |
| B. | 4 | 0 | II. | 2p |
| C. | 5 | 3 | III. | 4s |
| D. | 3 | 2 | IV. | 5f |
1. A-II, B-III, C-IV, D-I
2. A-I, B-II, C-III, D-IV
3. A-II, B-III, C-I, D-IV
4. A-IV, B-II, C-III, D-I
Level 4: Below 35%
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