Q. No.The role of an electrolyte in the preparation of H2 by electrolytic method is:
1.
It lowers the availability of ions available in the process for the conduction of electricity.
2.
It makes the ions available in the process for conduction of electricity.
3.
It cools down the temperature.
4.
None of the above
The products obtained on the completion of the following reactions (i) and (ii) respectively are :
| i. | C3H8(g) + 3H2O(g) \(\xrightarrow[Catalyst]{\Delta}\) A |
| ii. | \(\mathrm{Zn}_{(s)}+\mathrm{NaOH}_{(\mathrm{aq})} \xrightarrow[]{Heat}\)B |
1. A = CO, and H2 ; B = Na2ZnO2
2. A = CO2 ; B = Na4ZnO4
3. A = CH3CH2CH2OH ; B= ZnO
4. None of the above
The correct statement about electron-deficient hydride is that it:
| 1. | Does not have sufficient electrons to form a regular bond. |
| 2. | Cannot be represented by conventional Lewis structures. |
| 3. | Accept electrons. |
| 4. | All of the above. |
Atomic hydrogen or oxy-hydrogen torch is used for cutting and welding purposes because:
| 1. | Atomic hydrogen converts into molecular hydrogen and generates a large amount of energy. |
| 2. | Atomic hydrogen converts into molecular hydrogen and generates a low amount of energy. |
| 3. | Molecular hydrogen converts into atomic hydrogen and generates a large amount of energy. |
| 4. | Molecular hydrogen converts into atomic hydrogen and generates a low amount of energy. |
The temporary and permanent hardness of water is caused by -
1. Permanent hardness is caused by hydrogen carbonates and temporary hardness is caused by chlorides.
2. Temporary hardness is caused by dihydrogen and permanent hardness is caused by oxides.
3. Temporary hardness is caused by insoluble hydrogen carbonates and permanent hardness is caused by chlorides.
4. Temporary hardness is caused by hydrogen carbonates and permanent hardness is caused by chlorides.
The catalyst used to increase the production of H2 , by ‘coal gasification' process is -
1. Copper
2. FeCr2O4 (iron chromate)
3. Pd/C
4. None of the above.
The isotopes of hydrogen and their mass ratio are -
1. Protium, Deuterium, Tritium ; 3:2:3
2. Protium, Deuterium, Tritium ; 1:2:3
3. Protium, Deuterium, Tritium ; 2:2:3
4. Protium, Deuterium, Tritium ; 3:2:1
Match the items in Column I with the relevant items in Column II.
| Column I | Column II |
| A. Hydrogen peroxide is used as a | 1. Sodium hexametaphosphate |
| B. Used in Calgon method | 2. Clark's method |
| C. Temporary hardness of hard water is removed by | 3. Reducing agent |
Codes
| A | B | C | |
| 1. | 3 | 2 | 1 |
| 2. | 1 | 2 | 3 |
| 3. | 3 | 1 | 2 |
| 4. | 2 | 1 | 3 |
Correlate the items listed in Column I with those listed in Column II.
| Column I | Column II |
| A. Synthesis gas | 1. Na2[Na4(PO3)6 ] |
| B. Heavy water | 2. Mixture of CO and H2 |
| C. Calgon | 3. Prolonged electrolysis of water |
| D. Salt like hydrides | 4. Stoichiometric compounds of s-block elements |
Codes
| A | B | C | D | |
| 1. | 4 | 3 | 2 | 1 |
| 2. | 2 | 3 | 1 | 4 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 1 | 3 | 2 |
© 2024 GoodEd Technologies Pvt. Ltd.