Match Column I with Column II for the given properties/applications mentioned therein.
| Column I | Column II | ||
|---|---|---|---|
| A. | H | 1. | used in the name of perhydrol. |
| B. | H$$_2$$ | 2. | can be reduced to dihydrogen by NaH. |
| C. | H$$_2$$O | 3. | can be used in hydroformylation of olefin. |
| D. | H$$_2$$O$$_2$$ | 4. | can be used in cutting and welding. |
A. $\rightarrow(4)$
B. $\rightarrow(3)$
C. $\rightarrow(2)$
D. $\rightarrow$ (1)
A. Atomic hydrogen $(\mathrm{H})$ can be used in cutting and welding.
B. Dihydrogen $\left(\mathrm{H}_2\right)$ can be used in hydroformylation of olefin.
C. Water $\left(\mathrm{H}_2 \mathrm{O}\right)$ can be reduced to dihydrogen by NaH .
D. Hydrogen peroxide $\left(\mathrm{H}_2 \mathrm{O}_2\right)$ used in the name of perhydrol.
Match the terms in Column I with the relevant item in Column II.
| Column I | Column II | ||
|---|---|---|---|
| A. | Electrolysis of water produces | 1. | atomic reactor |
| B. | Lithium aluminium hydride is used as | 2. | polar molecule |
| C. | Hydrogen chloride is a | 3. | recombines on metal surface to generate high temperature |
| D. | Heavy water is used in | 4. | reducing agent |
| E. | Atomic hydrogen | 5. | hydrogen and oxygen |
A. $\rightarrow(5)$
B. $\rightarrow$ (4)
C. $\rightarrow(2)$
D. $\rightarrow$ (1)
E. $\rightarrow$ (3)
A. Electrolysis of water produce hydrogen and oxygen.
B. Lithium aluminium hydride is used as reducing agent.
C. Hydrogen chloride is a polar molecule.
D. Heavy water is used in atomic reactor as moderator.
E. Atomic hydrogen recombines on metal surface to generate high temperature.
Match the items in Column I with the relevant item in Column II.
| Column I | Column II | ||
|---|---|---|---|
| A. | Hydrogen peroxide is used as a | 1. | zeolite |
| B. | Used in Calgon method | 2. | perohydrol |
| C. | Permanent hardness of hard water is removed by | 3. | sodium hexametaphosphate |
| 4. | propellant |
A. $\rightarrow(2,4)$
B. $\rightarrow$ (3)
C. $\rightarrow(1,3)$
A. Hydrogen peroxide is used as a perhydrol and propellant.
B. Sodium hexametaphosphate is used in Calgon method.
C. Permanent hardness of hard water is removed by zeolite and sodium hexametaphosphate.
Assertion (A) Permanent hardness of water is removed by treatment with washing soda.
Reason (R) Washing soda reacts with soluble magnesium and calcium sulphate to form insoluble carbonates.
Assertion (A) Some metals like platinum and palladium, can be used as storage media for hydrogen.
Reason (R) Platinum and palladium can absorb large volumes of hydrogen.