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 |
| 1. | Mg2X3 | 2. | MgX2 |
| 3. | Mg2X | 4. | Mg3X2 |
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. | \(\mathrm{C_2H_4}\) |
Iron exhibits bcc structure at room temperature. Above 900 °C, it transforms to fcc structure. The ratio of density of iron at room temperature to that at 900 °C is:
(Molar mass and atomic radii of iron remain constant with temperature)
1.
2.
3.
4.
Which cells of "Crypts of Lieberkühn" secrete antibacterial lysozyme?
1. Paneth cells
2. Zymogen cells
3. Kupffer cells
4. Argentaffin cells
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 |
The incorrect statement among the following is:
| 1. | Total orbital angular momentum of an electron in 's' orbital is equal to zero. |
| 2. | An orbital is designated by three quantum numbers, while an electron in an atom is designated by four quantum numbers. |
| 3. | The electronic configuration of N atom is |
| 4. | The value of m for dz2 is zero. |
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 |
| 1. | NO | 2. | CN– |
| 3. | CN+ | 4. | CN |