Q. No.Consider the given reaction and choose the correct option:
\(NaCl(solid) + H_2SO_4(conc.) + K_2Cr_2O_7(s) \rightarrow \text {Product }\)
1. Product is \(CrO_2Cl_2\) and oxidation state of Cr= +6
2. Product is \(Cr_2O_2Cl_2\) and oxidation state of Cr= +6
3. Product is \(Cr_2O_2Cl_2\) and oxidation state of Cr= +3
4. Product is \(CrO_2Cl_2\) and oxidation state of Cr= +3
\(NaCl(solid) + H_2SO_4(conc.) + K_2Cr_2O_7(s) \rightarrow \text {Product }\)
1. Product is \(CrO_2Cl_2\) and oxidation state of Cr= +6
2. Product is \(Cr_2O_2Cl_2\) and oxidation state of Cr= +6
3. Product is \(Cr_2O_2Cl_2\) and oxidation state of Cr= +3
4. Product is \(CrO_2Cl_2\) and oxidation state of Cr= +3
Subtopic: Alcohols: Preparation & Properties |
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Level 2: 60%+
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Subtopic: Alcohols: Preparation & Properties |
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Level 1: 80%+
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A hydroxy compound (A) with molecular mass = 122 reacts with excess of acetic anhydride and gives compound (X) with molecular mass = 290, then find the no. of hydroxy groups in the given compound (A):
1. 2
2. 4
3. 6
4. 8
1. 2
2. 4
3. 6
4. 8
Subtopic: Alcohols: Preparation & Properties |
67%
Level 2: 60%+
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Given below are two statements:
| Statement I: | The boiling points of alcohols and phenols increase with increase in the number of C-atoms. |
| Statement II: | The boiling points of alcohols and phenols are higher in comparison to other class of compounds such as ethers and haloalkanes. |
| 1. | Both Statement I and Statement II are False |
| 2. | Statement I is False but Statement II is True |
| 3. | Statement I is True but Statement II is False |
| 4. | Both Statement I and Statement II are True |
Subtopic: Alcohols: Preparation & Properties | Phenols: Preparation & Properties |
79%
Level 2: 60%+
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Consider the following compounds:
Which option correctly ranks their boiling points from highest to lowest?
| a. |  |
b. |  |
| c. |  |
d. |  |
Which option correctly ranks their boiling points from highest to lowest?
| 1. | d > a > b > c | 2. | a > b > d >c |
| 3. | a > d > c > b | 4. | a > d > b > c |
Subtopic: Alcohols: Preparation & Properties |
72%
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Consider the following reaction scheme:
The sum of the total number of oxygen atoms in B and C is:
1. 12
2. 14
3. 20
4. 10
The sum of the total number of oxygen atoms in B and C is:
1. 12
2. 14
3. 20
4. 10
Subtopic: Alcohols: Preparation & Properties |
Level 3: 35%-60%
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Given below are two statements:
| Assertion (A): | \( \text{pK}_a\) value of phenol is 10.0, while that of ethanol is 15.9. |
| Reason (R): | Ethanol is a stronger acid than phenol. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Alcohols: Preparation & Properties |
80%
Level 1: 80%+
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Complete the following chemical reactions and determine the major products labeled as A and B.
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Alcohols: Preparation & Properties |
81%
Level 1: 80%+
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Consider the following reactions:
Identify the major product(s) (A) and (B) formed in the above reactions.
| (I) | \(\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}_2 \xrightarrow[\text { (ii) } \mathrm{H}_2 \mathrm{O}_2 / \mathrm{OH}^{-}]{\text {(i) } \mathrm{B}_2 \mathrm{H}_6 / \text { THF }}(A)\) |
| (II) | \(\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}_2 \xrightarrow{\mathrm{H}^{+} / \mathrm{H}_2 \mathrm{O}}(\mathrm{B})\) |
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Alcohols: Preparation & Properties |
85%
Level 1: 80%+
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Match the following compounds in List-I with their corresponding \(\mathrm{pK_a}\) values in List-II:
1. (a)→(i); (b)→(ii); (c)→(iii); (d)→(iv)
2. (a)→(iii); (b)→(iv); (c)→(ii); (d)→(i)
3. (a)→(iv); (b)→(iii); (c)→(ii); (d)→(i)
4. (a)→(iii); (b)→(iv); (c)→(i); (d)→(ii)
| List-I (Compounds) | List-II (\(\mathrm{pK_a}\)) | ||
| (a) | p-Nitrophenol | (i) | 10 |
| (b) | m-Nitrophenol | (ii) | 16 |
| (c) | Ethanol | (iii) | 7.1 |
| (d) | Phenol | (iv) | 8.3 |
1. (a)→(i); (b)→(ii); (c)→(iii); (d)→(iv)
2. (a)→(iii); (b)→(iv); (c)→(ii); (d)→(i)
3. (a)→(iv); (b)→(iii); (c)→(ii); (d)→(i)
4. (a)→(iii); (b)→(iv); (c)→(i); (d)→(ii)
Subtopic: Alcohols: Preparation & Properties |
68%
Level 2: 60%+
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