In the below reaction, the structure of "A" is:

| 1. | 2. | ![]() |
|
| 3. | 4. |
Which among the given molecules can exhibit tautomerism?
1. III only
2. Both I and III
3. Both I and II
4. Both II and III
What is the correct order of the carboxylic acids' strength?
| I. | II. | III. |
| 1. | I > II > III | 2. | II > III > I |
| 3. | III > II > I | 4. | II > I > III |
The compound that will react most readily with gaseous bromine has the formula:
| 1. | \(\mathrm{C_3H_6}\) | 2. | \(\mathrm{C_2H_2}\) |
| 3. | \(\mathrm{C_4H_{10}}\) | 4. | \(\mathrm{C_2H_4}\) |
Which one of the following is wrong for fungi?
| 1. | They are eukaryotic |
| 2. | All fungi possess a purely cellulosic cell wall |
| 3. | They are heterotrophic |
| 4. | They are both unicellular as well as multicellular |
Methanogens belong to:
1. eubacteria
2. archaebacteria
3. dinoflagellates
4. slime moulds
Select the wrong statement:
| 1. | The walls of diatoms are easily destructible |
| 2. | Diatomaceous earth is formed by the cell walls of diatoms |
| 3. | Diatoms are chief producers in the oceans |
| 4. | Diatoms are microscopic and float passively in water |
The label of a herbarium sheet does not carry information on:
1. date of collection
2. name of collector
3. local names
4. height of the plant
Conifers are adapted to tolerate extreme environmental conditions because of?
1. broad hardy leaves
2. superficial stomata
3. thick cuticle
4. the presence of vessels
Which one of the following statements is wrong?
| 1. | Algae increase the level of dissolved oxygen in the immediate environment |
| 2. | Algin is obtained from red algae and carrageenan from brown algae |
| 3. | Agar-agar is obtained from Gelidium and Gracilaria |
| 4. | Laminaria and Sargassum are used as food |