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 8 of 26.
Komal said:
8 years ago
I think option B is the correct answer.
Precious afriyie said:
8 years ago
The correct answer is B.
Tanav said:
8 years ago
I think answer B is right.
Vipin kumar said:
8 years ago
It oxidises brass that result in change of colour.
Rohith said:
8 years ago
It is a powerful gas.
Glory said:
8 years ago
Because it is a powerful gas.
Saurabh Agrahari said:
8 years ago
A is a better option because reactive free oxygen species is helpful to discolour the brass because free radical of oxygen may present which is react with brass.
Koushik said:
8 years ago
Hydrogen sulphide is a heavy gas, it has property to react with metals like copper, bronze, steel etc. At some conditions (temperature, moisture) brass is a metal (alloy) made of copper and zinc. These two metals are mixed in different proportions. Copper reacts with hydrogen sulphide which makes it corrosive.
Sudha said:
8 years ago
Hydrogen sulphide is a heavy gas, it has property to react with metals like copper, bronze, steel etc. At some conditions (temperature, moisture) brass is a metal (alloy) made of copper and zinc. These two metals are mixed in different proportions. Copper reacts with hydrogen sulphide which makes it corrosive.
Varsha said:
8 years ago
Because it is a powerful gas.
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