Q. No.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
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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.
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The incorrect statement among the following regarding hydrogen is -
1. Hydrogen never acts as a cation in Ionic salts
2. Hydronium ion, H3O+, exists freely in a solution
3. Dihydrogen does not act as a reducing agent
4. Hydrogen has three isotopes of which Protium is the most common
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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 |
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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
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The correct statement among the following regarding hydrogen is–
1. It can form a bond in +1 as well as –1 oxidation state
2. It is always collected at the cathode
3. It has a very low ionization potential
4. It has the same electronegativity as halogens
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When substance A reacts with water, it produces a combustible gas B and a solution of substances 'C' in water. When another substance 'D' reacts with this solution of C, it produces the same gas 'B' on warming but 'D' can produce gas 'B' on reaction with dilute sulphuric acid at room temperature. 'A' imparts a deep golden yellow colour to a smokeless flame of a bunsen burner. A, B, C and D respectively are -
1.
2.
3.
4.
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Dihydrogen gas cannot be prepared with-
1. Cu + HCl (dil.)
2. Fe + H2SO4
3. Mg + steam
4. Na + alcohol
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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 |
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