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Q. No.Rate of reaction of nucleophilic substitution with KCN in polar protic solvent:
1. A > B > C > D
2. B > A > C > D
3. A > B > D > C
4. B > A > D > C
1. A > B > C > D
2. B > A > C > D
3. A > B > D > C
4. B > A > D > C
Subtopic: Chemical Properties |
Level 4: Below 35%
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Hints
Find correct order of rate of reaction of \(CH_3Br\) with given nucleophiles \((\stackrel{\ominus}{\mathrm{Nu}})\)
1. \(\stackrel{\ominus}{\mathrm{O}} \mathrm{H}>\mathrm{Ph} \stackrel{\ominus}{\mathrm{O}}>\mathrm{HCO} \stackrel{\ominus}{\mathrm{O}}>\mathrm{ClO}_4^{\ominus} \)
2. \(\mathrm{Ph} \stackrel{\ominus}{\mathrm{O}}>\stackrel{\ominus}{\mathrm{O}} \mathrm{H}>\mathrm{HCO} \stackrel{\ominus}{\mathrm{O}}>\mathrm{ClO}_4^{\ominus} \)
3. \(\stackrel{\ominus}{\mathrm{O}} \mathrm{H}>\mathrm{Ph} \stackrel{\ominus}{\mathrm{O}}>\mathrm{ClO}_4^{\ominus}>\mathrm{HCO} \stackrel{\ominus}{\mathrm{O}} \)
4. \(\mathrm{Ph} \stackrel{\ominus}{\mathrm{O}}>\stackrel{\ominus}{\mathrm{O}}\mathrm{H}>\mathrm{ClO}_4^{\ominus}>\mathrm{HCO} \stackrel{\ominus}{\mathrm{O}}\)
1. \(\stackrel{\ominus}{\mathrm{O}} \mathrm{H}>\mathrm{Ph} \stackrel{\ominus}{\mathrm{O}}>\mathrm{HCO} \stackrel{\ominus}{\mathrm{O}}>\mathrm{ClO}_4^{\ominus} \)
2. \(\mathrm{Ph} \stackrel{\ominus}{\mathrm{O}}>\stackrel{\ominus}{\mathrm{O}} \mathrm{H}>\mathrm{HCO} \stackrel{\ominus}{\mathrm{O}}>\mathrm{ClO}_4^{\ominus} \)
3. \(\stackrel{\ominus}{\mathrm{O}} \mathrm{H}>\mathrm{Ph} \stackrel{\ominus}{\mathrm{O}}>\mathrm{ClO}_4^{\ominus}>\mathrm{HCO} \stackrel{\ominus}{\mathrm{O}} \)
4. \(\mathrm{Ph} \stackrel{\ominus}{\mathrm{O}}>\stackrel{\ominus}{\mathrm{O}}\mathrm{H}>\mathrm{ClO}_4^{\ominus}>\mathrm{HCO} \stackrel{\ominus}{\mathrm{O}}\)
Subtopic: Chemical Properties |
Level 4: Below 35%
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Hints
In following 4 molecules one is optically active, find the % of carbon in that chiral compound:
1-Chlorobutane, 2-Chloropropane 2-Chlorobutane, 1-Chloro-2, 2-Dimethyl propane
1. 11.61
2. 21.61
3. 51.89
4. 41.61
1-Chlorobutane, 2-Chloropropane 2-Chlorobutane, 1-Chloro-2, 2-Dimethyl propane
1. 11.61
2. 21.61
3. 51.89
4. 41.61
Subtopic: Isomerism & Chirality |
Level 4: Below 35%
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Hints
Match the List-I and List-II:
1. A → I, B → II, C → III, D → IV
2. A → I, B → II, C → IV, D → III
3. A → III, B → II, C → I, D → IV
4. A → III, B → II, C → IV, D → II
| (A) |  |
(I) | Vinyl chloride |
| (B) |  |
(II) | Allyl chloride |
| (C) |  |
(III) | Aryl chloride |
| (D) |  |
(IV) | Benzyl chloride |
1. A → I, B → II, C → III, D → IV
2. A → I, B → II, C → IV, D → III
3. A → III, B → II, C → I, D → IV
4. A → III, B → II, C → IV, D → II
Subtopic: Chemical Properties |
Level 4: Below 35%
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Hints
Given below are two statements:
1. Both Statements I and II are correct
2. Both Statements I and II are incorrect
3. Statements-I is correct, and Statement-II is incorrect
4. Statement I is incorrect, and Statement II is correct
| Statement I: | \(CH_2=CH-Cl\) is having a stronger C-CI bond than \(CH_3-CH_2-Cl.\) |
| Statement II: |  will rotate the plane polarised light after solvation. |
1. Both Statements I and II are correct
2. Both Statements I and II are incorrect
3. Statements-I is correct, and Statement-II is incorrect
4. Statement I is incorrect, and Statement II is correct
Subtopic: Introduction and Physical Properties | Isomerism & Chirality |
Level 4: Below 35%
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Hints
For the given reaction:
\(\mathrm{CH}_3-\mathrm{Br} \xrightarrow{\mathrm{CH}_3 \mathrm{OH} / \mathrm{Nu^-}}\)
Determine the correct order of reaction rates for the nucleophilic substitution using the following nucleophiles \( \Rightarrow \mathrm{I}^{\ominus}, \mathrm{F}^{\ominus}, \mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{\ominus}, \mathrm{PhO}^{\ominus}\)?
1. \( \mathrm{F}^{\ominus}>\mathrm{PhO}^{\ominus}>\mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{\ominus}>\mathrm{I}^{\ominus}\)
2. \( \mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{\ominus}>\mathrm{PhO}^{\ominus}>\mathrm{I}^{\ominus}>\mathrm{F}^{\ominus}\)
3. \( \mathrm{I}^{\ominus}>\mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{\ominus}>\mathrm{PhO}^{\ominus}>\mathrm{F}^{\ominus}\)
4. \( \mathrm{PhO}^{\ominus}>\mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{\ominus}>\mathrm{F}^{\ominus}>\mathrm{I}^{\ominus}\)
\(\mathrm{CH}_3-\mathrm{Br} \xrightarrow{\mathrm{CH}_3 \mathrm{OH} / \mathrm{Nu^-}}\)
Determine the correct order of reaction rates for the nucleophilic substitution using the following nucleophiles \( \Rightarrow \mathrm{I}^{\ominus}, \mathrm{F}^{\ominus}, \mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{\ominus}, \mathrm{PhO}^{\ominus}\)?
1. \( \mathrm{F}^{\ominus}>\mathrm{PhO}^{\ominus}>\mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{\ominus}>\mathrm{I}^{\ominus}\)
2. \( \mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{\ominus}>\mathrm{PhO}^{\ominus}>\mathrm{I}^{\ominus}>\mathrm{F}^{\ominus}\)
3. \( \mathrm{I}^{\ominus}>\mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{\ominus}>\mathrm{PhO}^{\ominus}>\mathrm{F}^{\ominus}\)
4. \( \mathrm{PhO}^{\ominus}>\mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{\ominus}>\mathrm{F}^{\ominus}>\mathrm{I}^{\ominus}\)
Subtopic: Mechanism of Reactions |
55%
Level 3: 35%-60%
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Hints
Arrange the following compounds in the increasing order of \(SN_1\) reaction:
1. P > Q > R > S
2. R > S > P > Q
3. R > S > Q > P
4. S > R > Q > P
1. P > Q > R > S
2. R > S > P > Q
3. R > S > Q > P
4. S > R > Q > P
Subtopic: Mechanism of Reactions | Chemical Properties |
81%
Level 1: 80%+
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Hints
Cycloalkene (X) reacts with bromine. During reaction 1 mole of cycloalkane consumes 1 mole of \(Br_2\) then form a product (Y). The product (Y) has C, Br ratio is 3 : 1. The % of bromine in product (Y) is :
1. 66.11 %
2. 65.11 %
3. 76.11 %
4. 67.11 %
1. 66.11 %
2. 65.11 %
3. 76.11 %
4. 67.11 %
Subtopic: Mechanism of Reactions | Chemical Properties |
51%
Level 3: 35%-60%
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Hints
Given below are two statements :
In the light of the above statements, choose the correct answer from the options given below.
| Statement I: | The conversion proceeds well in the less polar medium. |
| Statement II: | The conversion proceeds well in the more polar medium. |
| 1. | Both Statement I and Statement II are true |
| 2. | Both Statement I and Statement II are false |
| 3. | Statement I is false but Statement II is true |
| 4. | Statement I is true but Statement II is false |
Subtopic: Mechanism of Reactions |
64%
Level 2: 60%+
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Match the following name reactions in List-I with their corresponding products in List-II.
Choose the correct answer from the options given below:
1. A-II, B-III, C-I, D-IV
2. A-IV, B-I, C-III, D-II
3. A-IV, B-III, C-I, D-II
4. A-II, B-I, C-III, D-IV
| List-I (Name reaction) |
List-II (Product obtainable) |
||
| A. | Swarts reaction | I. | Ethyl benzene |
| B. | Sandmeyer’s reaction | II. | Ethyl iodide |
| C. | Wurtz Fittig reaction | III. | Cyanobenzene |
| D. | Finkelstein reaction | IV. | Ethyl fluoride |
Choose the correct answer from the options given below:
1. A-II, B-III, C-I, D-IV
2. A-IV, B-I, C-III, D-II
3. A-IV, B-III, C-I, D-II
4. A-II, B-I, C-III, D-IV
Subtopic: Chemical Properties |
83%
Level 1: 80%+
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