Q. No.
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
91%
Level 1: 80%+
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An Alkene P (\(C_4 H_8\) ) gives optically active product Q which further react with ammonia and gives R. R react with\(NaNO_2 + HCl\) followed by hydrolysis gives S. P, Q, R, S are respectively :
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4. |  |
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
83%
Level 1: 80%+
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An alkene on reductive ozonolysis gives methanal as one of the products, it's structure is:
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4. |  |
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
92%
Level 1: 80%+
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Given below are two statements :
In the light of the above statements, choose the most appropriate answer from the options given below:
| Statement I: | One mole of propyne reacts with excess of sodium to liberate half a mole of H2 gas. |
| Statement II: | 4g of propyne reacts with NaNH2 to liberate NH3 gas which occupies 224 mL at STP. |
In the light of the above statements, choose the most appropriate answer from the options given below:
| 1. | Statement I is correct but Statement II is incorrect. |
| 2. | Both Statement I and Statement II are incorrect. |
| 3. | Statement I is incorrect but Statement II is correct. |
| 4. | Both Statement I and Statement II are correct. |
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
69%
Level 2: 60%+
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Aman has been asked to synthesise the molecule 
. He thought of preparing the molecule using an aldol condensation reaction. He found a few cyclic alkenes in his laboratory. He thought of performing ozonolysis reaction on alkene to produce a dicarbonyl compound followed by aldol reaction to prepare “x”. Predict the suitable alkene that can lead to the formation of “x”.
. He thought of preparing the molecule using an aldol condensation reaction. He found a few cyclic alkenes in his laboratory. He thought of performing ozonolysis reaction on alkene to produce a dicarbonyl compound followed by aldol reaction to prepare “x”. Predict the suitable alkene that can lead to the formation of “x”.
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4. |  |
Subtopic: Aliphatic Hydrocarbon - Methods of Preparation | Alkanes, Alkenes and Alkynes - Chemical Properties |
81%
Level 1: 80%+
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Subtopic: Aliphatic Hydrocarbon - Methods of Preparation | Alkanes, Alkenes and Alkynes - Chemical Properties |
77%
Level 2: 60%+
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A compound 'X' absorbs 2 moles of hydrogen and 'X' upon oxidation with KMnO4 | H+ gives three compounds.
The total number of σ bonds present in the compound 'X' are:
The total number of σ bonds present in the compound 'X' are:
| 1. | 25 | 2. | 26 |
| 3. | 27 | 4. | 28 |
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
Level 3: 35%-60%
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Identify products [A], [B] and [C], respectively, in the following reaction sequence:
\(\mathrm{CH}_3-\mathrm{C} \equiv \mathrm{CH} \xrightarrow[\mathrm{H}_2]{\mathrm{Pd} / \mathrm{C}}[\mathrm{~A}] \xrightarrow[\text { (ii) } \mathrm{Zn}, \mathrm{H}_2 \mathrm{O}]{\text { (i) } \mathrm{O}_3}[\mathrm{~B}]+[\mathrm{C}]\)
\(\mathrm{CH}_3-\mathrm{C} \equiv \mathrm{CH} \xrightarrow[\mathrm{H}_2]{\mathrm{Pd} / \mathrm{C}}[\mathrm{~A}] \xrightarrow[\text { (ii) } \mathrm{Zn}, \mathrm{H}_2 \mathrm{O}]{\text { (i) } \mathrm{O}_3}[\mathrm{~B}]+[\mathrm{C}]\)
| 1. | \( \mathrm{{CH}_3-{CH}={CH}_2 , {CH}_3 {CHO}} ~\text {and}~\) \( \mathrm{HCHO}\) |
| 2. | \( \mathrm{{CH}_2={CH}_2, {H}_3 {C}- {CO }-{CH}_3} ~\text{and}~ \text {HCHO}\) |
| 3. | \( \mathrm{{CH}_3-{CH}={CH}_2,~ {CH}_3 {CHO}}~ \text {and}~\) \( \mathrm{{CH}_3 {CH}_2 {OH}}\) |
| 4. | \(\mathrm{{CH}_3 {CH}_2 {CH}_3, {CH}_3 {CHO}} ~\text {and} ~\mathrm{HCHO}\) |
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
81%
Level 1: 80%+
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When a propane molecule undergoes chlorination under photochemical conditions, it gives two di-chloro products, "x" and "y". Among these, "x" is optically active. How many structural isomers of tri-chloro products will be obtained from "x" when it is further treated with chlorine under photochemical conditions?
1. 4
2. 2
3. 5
4. 3
1. 4
2. 2
3. 5
4. 3
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
54%
Level 3: 35%-60%
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A molecule ("P") on treatment with acid undergoes rearrangement and gives ("Q") on ozonolysis, followed by reflux under alkaline conditions, yields ("R"). The structure of ("R") is shown below :
The structure of ("P" and "Q") can be:
1. (B) & (C)
2. (A) & (B)
3. (B) & (A)
4. (C) only
The structure of ("P" and "Q") can be:
| (A) |  |
(B) |  |
| (C) |  |
(D) |  |
1. (B) & (C)
2. (A) & (B)
3. (B) & (A)
4. (C) only
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
Level 3: 35%-60%
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