Which of the following products will contain the oxygen-18 (¹⁸O) isotope in the given reaction?

1. H2O
2. Methyl benzoate
3. Both 1 and 2
4. Benzoic acid
Product (A) in the below mentioned reaction is:

| 1. | ![]() |
2. | ![]() |
| 3. | ![]() |
4. | ![]() |
Which of the following compounds is most prone to oxidation?
| 1. | \(\mathrm{CH}_3-\mathrm{CHOH}-\mathrm{CH}_3\) |
2. | ![]() |
| 3. | \(\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{O}-\mathrm{CH}_2-\mathrm{CH}_3\) |
4. | ![]() |
Identify the product (P) in the given reaction:

| 1. | ![]() |
2. | ![]() |
| 3. | ![]() |
4. | ![]() |
Which of the following react with HBr at faster rate?


| 1. | \(\mathrm{NaBH}_4 \) | 2. | \(\mathrm{LiAlH}_4 \) |
| 3. | \(PCC \) | 4. | \(\mathrm{KMnO}_4\) |
| 1. | ![]() |
2. | ![]() |
| 3. | ![]() |
4. | ![]() |
Identify the major product,

1.
2.
3.
4. 
(A) Major; Product (A) is:
(a) 
(b) 
(c) 
(d) 
(A) Product (A) is: 
(a) No reaction
(b) 
(c) 
(d) 