Q. No.The correct order of increasing reducing nature is -
1. NaH > H2O < MgH2
2. > > NaH
3. < < NaH
4. < NaH
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
“Non-stoichiometric hydrides” are :
| 1. | Hydrogen-deficient compounds formed by the reaction of a hydrogen atom with d-block and f-block elements. |
| 2. | Hydrogen-deficient compounds formed by the reaction of dihydrogen with d-block and f-block elements. |
| 3. | Electron-deficient compounds formed by the reaction of dihydrogen with d-block and f-block elements. |
| 4. | Hydrogen-deficient compounds formed by the reaction of dihydrogen with s-block and p-block elements. |
Hydrogen is placed separately in the periodic table because :
1. It resembles alkali metals.
2. It shows the same reactions as halogens.
3. Both (1) and (2)
4. None of the above.
The following reaction is an example of :
\(2 \mathrm{MnO}_4^{-}+6 \mathrm{H}^{+}+5 \mathrm{H}_2 \mathrm{O}_2 \rightarrow 2 \mathrm{Mn}^{2+}+8 \mathrm{H}_2 \mathrm{O}+5 \mathrm{O}_2\)
1. Hydrolysis reaction
2. Redox reaction
3. Disproportionation reaction
4. None of the above
The correct order of increasing electrical conductance is -
1. BeH2 > CaH2 > TiH2
2. BeH2 < CaH2 > TiH2
3. TiH2 < BeH2 < CaH2
4. BeH2 < CaH2 < TiH2
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 consequences of high enthalpy of H–H bond in dihydrogen is /are :
| 1. | Hydrogen has a low tendency to form ions. |
| 2. | It forms diatomic molecules (), and a large number of covalent hydrides. |
| 3. | Hydrogen does not possess metallic characteristics. |
| 4. | All of the above. |
Metallic hydrides are useful for hydrogen storage because :
1. Metallic hydrides are oxygen-rich.
2. Metallic hydrides are oxygen-deficient.
3. Metallic hydrides are hydrogen-rich.
4. Metallic hydrides are hydrogen-deficient.
© 2026 GoodEd Technologies Pvt. Ltd.