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Hydrogen — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryHydrogen5 Marks
Question
  1. Name the element which forms maximum number of compound.
  2. How is nascent hydrogen prepared?
  3. What is ratio of $\frac{\text{C}_\text{P}}{\text{C}_\text{V}}$ for hydrogen andwhy?
  4. What is half life of tritium? How is it obtained?
  5. If we electrolyse 2000 litres of $H_2O_2$ how much heavy water will be formed?
✓

Answer

  1. Hydrogen forms maximum number of compounds.
  2. It is produced by reaction of Zn-Cu with $H_2O$ or Na and ethyl alcohol.
$2\text{Zn}+\text{H}_2\text{O}\xrightarrow{\ \ \ \ \ \ \ \ \ \ }\text{ZnO}+2[\text{H}]$

$2\text{C}_2\text{H}_5\text{Oh}+2\text{Na}\xrightarrow{\ \ \ \ \ \ \ \ \ \ }2\text{C}_2\text{H}_5\text{ONa}+2[\text{H}]$
  1. $\frac{\text{C}_\text{P}}{\text{C}_\text{V}}=1.40$ brcause $H_2$ is diatomic.
  2. It is 12.33 year
$^6_3\text{Li}+\ ^1_0\text{n}\xrightarrow{\ \ \ \ \ \ \ \ \ \ }\ ^4_2\text{He}+\ ^1_1\text{H}$

It is formed by bombarding $^6_3\text{Li}$ with neutron.
  1. 70ml of 99% heavy water is formed by electrolysis of 2000 litres of water because $H_2O$ contains 0.016% deuterium.

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