Which one of the following is an ambidentate ligand ?
1. Oxalate
2. Ethylenediaminetetraacetate ion
3. Thiocyanate
4. Ethane-1,2-diamine
1. Oxalate
2. Ethylenediaminetetraacetate ion
3. Thiocyanate
4. Ethane-1,2-diamine
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A bulb is rated at 150 watt, converting 8% energy into light. If energy of one photon is \(4 \cdot 42 \times 10^{-19} \mathrm{~J},\) how many photons are emitted by the bulb per second?
1. \(1.35 \times 10^{19} \)
2. \( 2.71 \times 10^{19} \)
3. \( 27.2 \times 10^{19} \)
4. \( 4.06 \times 10^{19}\)
1. \(1.35 \times 10^{19} \)
2. \( 2.71 \times 10^{19} \)
3. \( 27.2 \times 10^{19} \)
4. \( 4.06 \times 10^{19}\)
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Identify the incorrect statement from the following :
| 1. | Nitrogen can form pπ-pπ multiple bonds with itself. |
| 2. | P(C2H5)3 and As(C6H5)3 form dπ-dπ bond with transition metals. |
| 3. | Nitrogen can form dπ-pπ bond with oxygen. |
| 4. | Phosphorus, arsenic and antimony show catenation property. |
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The correct order of increasing metallic character of Na, Be, P, Mg and Si is:
1. P < Si < Na < Mg < Be
2. Be < Si < P < Mg < Na
3. P< Si < Be < Mg < Na
4. P< Mg < Be < Si < Na
1. P < Si < Na < Mg < Be
2. Be < Si < P < Mg < Na
3. P< Si < Be < Mg < Na
4. P< Mg < Be < Si < Na
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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. 9.301
3. 5.286
4. 8.714
\(BiO(OH)(s) \rightleftharpoons BiO^{+}(aq) + OH^{-}(aq)~\),
\(K = 4 \times 10^{-10}~\)
(Given : \(\log 2 = 0.3010~\))
1. 4.699
2. 9.301
3. 5.286
4. 8.714
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Match List I with List II :
Choose the correct answer from the options given below :
1. A-I, B-II, C-IV, D-III
2. A-II, B-III, C-I, D-IV
3. A-III, B-IV, C-II, D-I
4. A-IV, B-I, C-III, D-II
| List I | List II | ||
| A. | C2H4 | I. | 3 σ bonds, 2 π bonds |
| B. | C2H2 | II. | 3 bonds, one lone pair |
| C. | CH4 | III. | 4 σ bonds |
| D. | NH3 | IV. | 5 σ bonds, 1 π bond |
Choose the correct answer from the options given below :
1. A-I, B-II, C-IV, D-III
2. A-II, B-III, C-I, D-IV
3. A-III, B-IV, C-II, D-I
4. A-IV, B-I, C-III, D-II
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Given below are certain reactions. Identify the reaction for which \(K_p \neq K_c.\)
1. \( \mathrm{N}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}(\mathrm{~g}) ~\)
2. \( \mathrm{H}_2 \mathrm{O}(\mathrm{~g})+\mathrm{CO}(\mathrm{~g}) \rightleftharpoons \mathrm{H}_2(\mathrm{~g})+\mathrm{CO}_2(\mathrm{~g}) ~\)
3. \( \mathrm{H}_2(\mathrm{~g})+1_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{HI}(\mathrm{~g})~\)
4. \( \mathrm{N}_2(\mathrm{~g})+3 \mathrm{H}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NH}_3(\mathrm{~g}) ~\)
1. \( \mathrm{N}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}(\mathrm{~g}) ~\)
2. \( \mathrm{H}_2 \mathrm{O}(\mathrm{~g})+\mathrm{CO}(\mathrm{~g}) \rightleftharpoons \mathrm{H}_2(\mathrm{~g})+\mathrm{CO}_2(\mathrm{~g}) ~\)
3. \( \mathrm{H}_2(\mathrm{~g})+1_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{HI}(\mathrm{~g})~\)
4. \( \mathrm{N}_2(\mathrm{~g})+3 \mathrm{H}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NH}_3(\mathrm{~g}) ~\)
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The major product Z formed in the following sequence of reactions is :
\(C_2H_6 \xrightarrow[\text{UV light}]{Cl_2} X \text{ (monochlorinated product)} \xrightarrow{NH_3} Y \xrightarrow[\text{(ii) } H_2O]{\text{(i) } NaNO_2, HCl} Z\)
1. \(C_2H_5NO_2~\)
2. \(C_2H_5-N=N-OH~\)
3. \(C_2H_5NH_2\)
4. \(C_2H_5OH~\)
\(C_2H_6 \xrightarrow[\text{UV light}]{Cl_2} X \text{ (monochlorinated product)} \xrightarrow{NH_3} Y \xrightarrow[\text{(ii) } H_2O]{\text{(i) } NaNO_2, HCl} Z\)
1. \(C_2H_5NO_2~\)
2. \(C_2H_5-N=N-OH~\)
3. \(C_2H_5NH_2\)
4. \(C_2H_5OH~\)
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When \(1 \text{ dm}^3\) of \(\text{CO}_2\) gas is passed over hot coke, the volume of gaseous mixture after complete reaction at STP becomes \(1.4 \text{ dm}^3\). The composition of the gaseous mixture at STP is :
| 1. | \(0.6 \text{ dm}^3\) of \(\text{CO},\) \(0.8 \text{ dm}^3\) of \(\text{CO}_2\) |
| 2. | \(0.6 \text{ dm}^3\) of \(\text{CO},\) \(0.4 \text{ dm}^3\) of \(\text{CO}_2\) |
| 3. | \(0.8 \text{ dm}^3\) of \(\text{CO},\) \(0.8 \text{ dm}^3\) of \(\text{CO}_2\) |
| 4. | \(0.8 \text{ dm}^3\) of \(\text{CO},\) \(0.6 \text{ dm}^3\) of \(\text{CO}_2\) |
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