General Knowledge - General Science - Discussion

Discussion Forum : General Science - Elements and Metals (Q.No. 1)
1.
Brass gets discoloured in air because of the presence of which of the following gases in air?
Oxygen
Hydrogen sulphide
Carbon dioxide
Nitrogen
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
248 comments Page 24 of 25.

Tsering said:   1 decade ago
As we know that zinc and copper is substituent of the brass so they get reacted with hydrogen sulphide. Also compare to other hydrogen sulphide is more electronegative.

Srinivas jntv said:   1 decade ago
Transition elements are coloured. The brass is combination of zn and cu. But it is discoloured due to hydrogen sulphide in air.

Shivani said:   1 decade ago
Becuse it is a chemical reaction so it discolored the color of the brass.

Hina said:   1 decade ago
Option b is correct.

Ruhi Khan said:   1 decade ago
Actually transition elements are colored elements. Here Zn & Cu are the transition elements ,these composition is the brass. But it gets discolored in air because of presence of Hydrogen sulphide in the air.It discolored the color of the brass. So it appears as discolored.

Ankush thakur said:   1 decade ago
Presence of air and water in atmosphere.

Pravesh sharma said:   1 decade ago
I think that option a is correct because O2 can react with brass and can discolored it

MD.Imran said:   1 decade ago
It is because the presence of mixture of hydrogen and sulphide and brass is a type of thing which has a color very light and mixture is non temperature (hot and cold type of temperature) so it gets discolored.this is better answer.etc

Rajendra said:   1 decade ago
It is one of the nature.
(1)

Bikash Panigrahi said:   1 decade ago
It's due to the sulphide action.
(1)


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