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?
Discussion:
254 comments Page 15 of 26.
Anilkumar said:
9 years ago
I think the correct answer is carbon-di-oxide.
Umar Ali said:
9 years ago
If option "b" (Hydrogen Sulphide) is the correct one then please can anybody tell me that, is hydrogen sulphide is present in the air? I think it is not and the correct answer is Co2.
Malaisha said:
9 years ago
No, the correct answer is option A.
Hina shafiq said:
9 years ago
Yeah, option "b" is correct because brass is a metal and hydrogen sulphide reacts rapidly with metal.
Vinu said:
9 years ago
Can't understand. What's the correct answer.
Remo said:
9 years ago
I think option B is correct because brass is an alloy made of copper and zinc; the proportion of zinc and copper can be varied to create a range of brasses with varying properties.
Ajoy J Tharakan said:
9 years ago
Guys, If it would have been Oxygen, Carbon Dioxide or Nitrogen then you would easily notice the colour change in your brass utensils. That is common sense, also hydrogen sulphide reacts easily with metals like Brass.
Sachin said:
9 years ago
Which of the following gases in air units with many metals?
(A) Hydrogen
(B) Oxygen
(C) Helium
(D) Carbon dioxide
Please tell me the answer.
(A) Hydrogen
(B) Oxygen
(C) Helium
(D) Carbon dioxide
Please tell me the answer.
Jamelia said:
9 years ago
I believe it is option c.
Firoz said:
9 years ago
Oxygen @Sachin.
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