Home
Class 12
CHEMISTRY
High purity dihydrogen is obtained by el...

High purity dihydrogen is obtained by electrolysing

A

Warm aqueous barium hydroxide

B

Brine solution

C

Acidified sulphate solution

D

Water gas

Text Solution

AI Generated Solution

The correct Answer is:
To determine the correct option for obtaining high purity dihydrogen through electrolysis, we can analyze each option provided in the question. ### Step-by-Step Solution: 1. **Understanding Electrolysis**: - Electrolysis is a process that uses electrical energy to drive a non-spontaneous chemical reaction. In the case of water, it involves the decomposition of water into hydrogen and oxygen gases. 2. **Evaluating the Options**: - **Option 1: Warm Aqueous Barium Hydroxide**: - Barium hydroxide is a strong base and acts as an excellent electrolyte. When electrolyzed, it produces high purity hydrogen gas (around 99.95% purity). This is because it provides a good medium for the conduction of electricity. - **Option 2: Brine Solution**: - Brine (saltwater) can also conduct electricity but typically produces chlorine gas at the anode and hydrogen gas at the cathode. The presence of chlorine can contaminate the hydrogen produced, leading to lower purity. - **Option 3: Acidified Sulfate Solution**: - Acidified sulfate solutions can produce hydrogen gas, but the purity may not be as high as that obtained from barium hydroxide due to possible side reactions and impurities. - **Option 4: Water Gas**: - Water gas is a mixture of hydrogen and carbon monoxide. Electrolysis of water gas would not yield pure hydrogen, as it contains carbon monoxide, which is an impurity. 3. **Conclusion**: - Based on the analysis, the best option for obtaining high purity dihydrogen is **Option 1: Warm Aqueous Barium Hydroxide**. This method yields hydrogen gas with a purity greater than 99.95%. ### Final Answer: **High purity dihydrogen is obtained by electrolyzing warm aqueous barium hydroxide.** ---
Promotional Banner

Topper's Solved these Questions

  • HYDROGEN

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION - B) (objective type question)|38 Videos

  • HYDROGEN

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION - C) (Previous type questions)|26 Videos

  • HYDROGEN

    AAKASH INSTITUTE ENGLISH|Exercise EXERCISE|10 Videos

  • HYDROCARBONS

    AAKASH INSTITUTE ENGLISH|Exercise Assignment(Section - C) (Previous Years Questions)|60 Videos

  • M0ck test 26

    AAKASH INSTITUTE ENGLISH|Exercise EXAMPLE|43 Videos

Similar Questions

Explore conceptually related problems

Assertion : Hydrogen cannot be prepared in laboratory. Reason : Hydrogen of high purity is obtained by electrolysing warm aqueous barium hydroxide between Nickel electrods.

High purity copper is obtained by

Dihydrogen has :

High purity copper metal is obtained by

High purity copper metal is obtained by

High density polythene is obtained by

Give reasons for the following : (i) Metals can be recovered from their ores by chemical methods. (ii) High purity metals can be obtained by zone refining method. (iii) Why is sodium choride added during electrolysis of fused anhydrous magnesium chloride ? (iv) Why is chalcocite roasted and not calcinated during recovery of copper ?

Metals of high purity are obtained by zone refining. Impurities are more soluble in melt in pure metal.

The production of dihydrogen obtained from coal gasification can be increased by reacting carbon monoxide of syngas mixture with steam in presence of a catalyst iron chromate. What is this process called?

Assertion (A) : Dihydrogen is prepared in the laboratory by the action of conc H_2SO_4 on granular zinc. Reason (R) : Pure hydrogen can be obtained by the action of water on sodium hydride.