The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is

Question

Reaction of $BeCl_2$ with $LiAlH_4$gives :

$AlCl_3$
$BeH_2$
$LiH$
$LiCl$
$BeAlH_4$

Choose the correct answer from the options given below :

Answer 1

The question asks which metal cannot be obtained by electrolysis of an aqueous solution of its salts. Let's evaluate the options given:

Silver (Ag): Silver can be easily obtained by electrolysis of its aqueous salt solutions because it is a less reactive metal. It readily gets reduced at the cathode during electrolysis.
Calcium (Ca): Calcium is a highly reactive metal. During the electrolysis of an aqueous solution, water gets reduced instead of calcium ions due to calcium's high reactivity. This means that calcium cannot be obtained by electrolysis of its aqueous solution.
Copper (Cu): Similar to silver, copper is also a less reactive metal and can be obtained by electrolysis of its aqueous salt solutions.
Chromium (Cr): Chromium can also be obtained by electrolysis, but its conditions are more specific compared to more reactive metals like calcium.

Conclusion: The correct answer is $Ca$ because calcium is too reactive to be deposited by electrolysis from aqueous solutions. Water will be electrolyzed instead, producing hydrogen gas at the cathode, not calcium metal.

Answer 2

The question asks which metal cannot be obtained by electrolysis of an aqueous solution of its salts. Let's evaluate the options given:

Silver (Ag): Silver can be easily obtained by electrolysis of its aqueous salt solutions because it is a less reactive metal. It readily gets reduced at the cathode during electrolysis.
Calcium (Ca): Calcium is a highly reactive metal. During the electrolysis of an aqueous solution, water gets reduced instead of calcium ions due to calcium's high reactivity. This means that calcium cannot be obtained by electrolysis of its aqueous solution.
Copper (Cu): Similar to silver, copper is also a less reactive metal and can be obtained by electrolysis of its aqueous salt solutions.
Chromium (Cr): Chromium can also be obtained by electrolysis, but its conditions are more specific compared to more reactive metals like calcium.

Conclusion: The correct answer is $Ca$ because calcium is too reactive to be deposited by electrolysis from aqueous solutions. Water will be electrolyzed instead, producing hydrogen gas at the cathode, not calcium metal.

The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is

The Correct Option is B

Solution and Explanation

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