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Q. No.An organic compound A gives a positive iodoform test but does not respond to Tollens’ reagent. Upon acidic hydrolysis, it forms a product P, which gives positive results for both the Tollens’ test and the iodoform test.
Identify the correct structure of compound A from the following options:
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Aldehydes & Ketones: Preparation & Properties |
Level 4: Below 35%
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Hints
Match correctly from the reagents given in Column I with the named reaction given in Column II
| Column I | Column II | ||
| P | \(Pd-BaSO_4\) | 1 | Etard reaction |
| Q | \(CrO_2Cl_2+ CS_2\) | 2 | Stephen's reduction |
| R | \(SnCl_2 + HCl\) | 3 | Gattermann's Koch reaction |
| S | \(CO+ HCl + AlCl_3\) anhydrous |
4 | Rosenmund's reduction |
| P | Q | R | S | |
| 1. | 1 | 4 | 2 | 3 |
| 2. | 3 | 2 | 4 | 1 |
| 3. | 4 | 1 | 2 | 3 |
| 4. | 1 | 3 | 4 | 2 |
Subtopic: Aldehydes & Ketones: Preparation & Properties | Name Reaction |
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Level 1: 80%+
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Subtopic: Aldehydes & Ketones: Preparation & Properties |
70%
Level 2: 60%+
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Consider two reactions given below:
Sum of molar masses of gas (x) & (y) is:
1. 44
2. 88
3. 46
4. 160
Sum of molar masses of gas (x) & (y) is:
1. 44
2. 88
3. 46
4. 160
Subtopic: Carboxylic Acids: Preparation & Properties |
Level 4: Below 35%
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Given below are two statements:
|
Statement I: |
Two different aldehyde on cross aldol condensation always give four products. |
| Statement II: | Among benzaldehyde and acetophenone only acetophenone reacts with semicarbazide. |
| 1. | Statement-I and Statement-II both are correct |
| 2. | Statement-I is incorrect Statement-II is correct |
| 3. | Statement-I is correct Statement-II is incorrect |
| 4. | Statement-I and Statement-II both incorrect |
56%
Level 3: 35%-60%
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Observe the given reaction of an ether under acidic hydrolysis (H₂O / H⁺), which undergoes cleavage to form carbonyl compounds.
The same reaction is carried out with the following ether, as follows:
Identify the correct test that will be given by the products X and Y.
1. Fehling's test
2. 2,4-DNP
3. \(NaHSO_3\)
4. Lucas test
The same reaction is carried out with the following ether, as follows:
Identify the correct test that will be given by the products X and Y.
1. Fehling's test
2. 2,4-DNP
3. \(NaHSO_3\)
4. Lucas test
Subtopic: Aldehydes & Ketones: Preparation & Properties | Name Reaction |
Level 3: 35%-60%
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Find correct matching of reaction of Glucose with given reagent in column-I and product formed in column-II:
| Column-I | Column-II | ||
| (P) | Hydroxylamine | (1) | Gluconic acid |
| (Q) | \(Br_2\) water | (2) | Glucose pentaacetate |
| (R) | Excess of acetic anhydride | (3) | Sachharic acid |
| (S) | Conc. \(HNO_3\) | (4) | Gluose-oxime |
| P | Q | R | S | |
| (1) | 4 | 1 | 2 | 3 |
| (2) | 4 | 3 | 2 | 1 |
| (3) | 1 | 3 | 4 | 2 |
| (4) | 3 | 1 | 4 | 2 |
Subtopic: Aldehydes & Ketones: Preparation & Properties | Carboxylic Acids: Preparation & Properties |
90%
Level 1: 80%+
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Organic compound A with molecular formula \(C_8H_8O_2\) gives cross aldol condensation reaction with acetone and A also react with conc. NaOH and produce alcohol as one of the product, identify the structure of A:
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Name Reaction |
77%
Level 2: 60%+
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In which among the following reaction(s), 
is not formed?
Set of incorrect reaction(s) is :
1. b, c
2. b, e
3. b, c, e
4. Only b
is not formed?
| (a) |  |
| (b) |  |
| (c) |  |
| (d) |  |
| (e) |  |
Set of incorrect reaction(s) is :
1. b, c
2. b, e
3. b, c, e
4. Only b
Subtopic: Aldehydes & Ketones: Preparation & Properties |
61%
Level 2: 60%+
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Match the following and choose the correct option:
1. a → (i), b → (ii), c → (iii), d → (iv)
2. a → (iv), b → (iii), c → (ii), d → (i)
3. a → (iii), b → (ii), c → (iv), d → (i)
4. a → (i), b → (ii), c → (iv), d → (iii)
| List-I | List-II | ||
| (a) | \(\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]^{\oplus}\) | (i) | Fehling solution |
| (b) | Zn-Hg/HCI | (ii) | Clemmensen reduction |
| (c) | \(\mathrm{NH}_2-\mathrm{NH}_2 / \mathrm{KOH}\) | (iii) | Tollen's reagent |
| (d) | \(\mathrm{Cu}^{+2} / \mathrm{OH}^{\ominus}\) | (iv) | Wolff-Kishner reduction |
1. a → (i), b → (ii), c → (iii), d → (iv)
2. a → (iv), b → (iii), c → (ii), d → (i)
3. a → (iii), b → (ii), c → (iv), d → (i)
4. a → (i), b → (ii), c → (iv), d → (iii)
Subtopic: Aldehydes & Ketones: Preparation & Properties |
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