The correct order of increasing reducing nature is -
1. NaH > H2O < MgH2
2. > > NaH
3. < < NaH
4. < NaH
Dihydrogen gas cannot be prepared with-
1. Cu + HCl (dil.)
2. Fe + H2SO4
3. Mg + steam
4. Na + alcohol
A water softening reagent among the following is -
1.
2.
3.
4.
The group that has hydride formed by only one member is -
1. 6
2. 7
3. 8
4. 9
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 |
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 |
Match the column:-
Column I | Column II |
A. Heavy water | P. Bicarbonates of Ca & Mg |
B. Temporary hardness | Q. No foreign ions |
C. Soft water | R. D2O |
D. Permanent Hardness | S. Sulphates of Ca & Mg |
A | B | C | D | |
1. | S | P | Q | R |
2. | R | P | Q | S |
3. | P | Q | R | S |
4. | S | R | P | Q |
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
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