Question

Which of the following is an effective reducing agent? A) H2O B) H2S C) H2Te D) H2Se

Answer 1

H2S is the effective reducing agent

Reducing agent is the one which reduce the oxidizing agent

Because by getting Oxygen atom , it becomes H2 SO4

Answer 2

$H_2S$ is an effective reducing agent.

Option - B

Explanation:

• Hydrogen sulphide is one of the pollutant gas with a rotten egg smell.
• But it is a very effective reducing agent because it has the capability to accept the large number of electrons.
• The oxidation number of $H_2S$ is -2 and it becomes $H_2SO_4$ having an oxidation number of 6.
• One molecule of hydrogen sulphide has the capability to donate 8 electrons to the the oxidizing agent.
• So it is the most effective reducing agent among the options.

To know more:

Carbon monoxide is more effective reducing agent than carbon below 983 K but above this temperature the

reverse is true. How would you explain this?

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