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प्रश्न
Which of the following reactions increases production of dihydrogen from synthesis gas?
पर्याय
\[\ce{CH4 (g) + H2O (g) ->[1270 K][Ni] CO (g) + 3H2 (g)}\]
\[\ce{C (s) + H2O (g) ->[1270 K] CO (g) + H2 (g)}\]
\[\ce{CO (g) + H2O (g) ->[673 K][Catalyst] CO2 (g) + H2 (g)}\]
\[\ce{C2H6 + 2H2O ->[1270 K][Ni] 2CO + 5H2}\]
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उत्तर
\[\ce{CO (g) + H2O (g) ->[673 K][Catalyst] CO2 (g) + H2 (g)}\]
Explanation:
The production of dihydrogen can be increased by reacting carbon monoxide of syngas mixtures with steam in the presence of iron chromate as catalyst.
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Match Column I with Column II for the given properties/applications mentioned therein.
| Column I | Column II |
| (i) \[\ce{H}\] | (a) Used in the name of perhydrol. |
| (ii) \[\ce{H2}\] | (b) Can be reduced to dihydrogen by \[\ce{NaH}\]. |
| (iii) \[\ce{H2O}\] | (c) Can be used in hydroformylation of olefin. |
| (iv) \[\ce{H2O2}\] | (d) Can be used in cutting and welding. |
Atomic hydrogen combines with almost all elements but molecular hydrogen does not. Explain.
How can \[\ce{D2O}\] be prepared from water? Mention the physical properties in which \[\ce{D2O}\] differs from \[\ce{H2O}\]. Give at least three reactions of \[\ce{D2O}\] showing the exchange of hydrogen with deuterium.
Hydrogen readily combines with metals and thus shows its ______.
Which of the following statements are not correct?
- Hydrogen is used to reduce heavy metal oxides to metals.
- Heavy water is used to study reaction mechanism.
- Hydrogen is used to make saturated fats from oils.
- The H-H bond dissociation enthalpy is lowest as compared to a single bond between two atoms of any element.
- Hydrogen reduces oxides of metals that are more active than iron.
Choose the most appropriate answer from the options given below:
