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 2 of 26.
Ramesh Naik Dhanavath said:
1 decade ago
Primary ingredients of of brass are Copper&zinc. When brass exposed to air the hydrogen sulphide in the atmosphere is react with copper&zinc.
Copper reacts with sulphide ion and forms cupric sulphide which is black in color where as zinc reacts with hydrogen and forms zinc hydroxide which is faint red in color. Hence brass gets discolored when it exposed to air.
Copper reacts with sulphide ion and forms cupric sulphide which is black in color where as zinc reacts with hydrogen and forms zinc hydroxide which is faint red in color. Hence brass gets discolored when it exposed to air.
K. Poorna chandra rao said:
1 decade ago
Composition of Dry Air.
Substance % by volume.
Nitrogen, N2 78.08.
Oxygen, O2 20.95.
Argon, Ar 0.93.
Carbon dioxide, CO2 0.033.
Neon, Ne 0.0018.
Helium, He 0.00052.
Methane, CH4 0.0002.
Krypton, Kr 0.00011.
Nitrogen (I) oxide, N2O 0.00005.
Hydrogen, H2 0.00005.
Xenon, Xe 0.0000087.
Ozone, O3 0.000001.
In air H2S won't exists directly in air. Then how it will react?
Substance % by volume.
Nitrogen, N2 78.08.
Oxygen, O2 20.95.
Argon, Ar 0.93.
Carbon dioxide, CO2 0.033.
Neon, Ne 0.0018.
Helium, He 0.00052.
Methane, CH4 0.0002.
Krypton, Kr 0.00011.
Nitrogen (I) oxide, N2O 0.00005.
Hydrogen, H2 0.00005.
Xenon, Xe 0.0000087.
Ozone, O3 0.000001.
In air H2S won't exists directly in air. Then how it will react?
K. Poorna chandra rao said:
1 decade ago
Composition of Dry Air.
Substance % by volume.
Nitrogen, N2 78.08.
Oxygen, O2 20.95.
Argon, Ar 0.93.
Carbon dioxide, CO2 0.033.
Neon, Ne 0.0018.
Helium, He 0.00052.
Methane, CH4 0.0002.
Krypton, Kr 0.00011.
Nitrogen (I) oxide, N2O 0.00005.
Hydrogen, H2 0.00005.
Xenon, Xe 0.0000087.
Ozone, O3 0.000001.
In air H2S won't exists directly in air. Then how it will react?
Substance % by volume.
Nitrogen, N2 78.08.
Oxygen, O2 20.95.
Argon, Ar 0.93.
Carbon dioxide, CO2 0.033.
Neon, Ne 0.0018.
Helium, He 0.00052.
Methane, CH4 0.0002.
Krypton, Kr 0.00011.
Nitrogen (I) oxide, N2O 0.00005.
Hydrogen, H2 0.00005.
Xenon, Xe 0.0000087.
Ozone, O3 0.000001.
In air H2S won't exists directly in air. Then how it will react?
Rohini said:
1 year ago
This is because the presence of a mixture of hydrogen and sulphide and brass, which has a very light colour and mixture with hydrogen sulphide leads to non-temperature (hot and cold temperature type). So it becomes discoloured. Hence, brass gets discoloured in the air because of the presence of hydrogen sulphide.
(16)
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.
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.
Ravi said:
7 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.
Bijoy patra said:
6 years ago
Brass gets discolored in air because of the presence of Hydrogen sulphide. Reason: It is because the presence of a mixture of hydrogen and sulphide and brass is a type of thing which has a colour very light and the mixture is non-temperature (a hot and cold type of temperature) so it gets discoloured.
Akash Rana said:
5 years ago
Brass gets discolored in the air because of the presence of Hydrogen sulphide. It is because the presence of a mixture of hydrogen and sulphide and brass is a type of thing that has a color very light and the mixture is non-temperature (hot and cold type of temperature) so it gets discolored.
Anomie said:
7 years ago
Brass gets discolored in air because of the presence of Hydrogen sulphide.
It is because the presence of a mixture of hydrogen and sulphide and brass is a type of thing which has a colour very light and the mixture is non-temperature (hot and cold type of temperature) so it gets discoloured.
It is because the presence of a mixture of hydrogen and sulphide and brass is a type of thing which has a colour very light and the mixture is non-temperature (hot and cold type of temperature) so it gets discoloured.
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