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 18 of 26.
Hina shafiq said:
9 years ago
Yeah, option "b" is correct because brass is a metal and hydrogen sulphide reacts rapidly with metal.
Malaisha said:
9 years ago
No, the correct answer is option A.
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.
Firoz said:
9 years ago
Oxygen @Sachin.
Jamelia said:
9 years ago
I believe it is option c.
Lauren said:
9 years ago
All these comments only for one questions.
Jeron said:
9 years ago
No, it is option B because they are asking discoloured one.
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