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 4 of 26.
Mudasir said:
2 years ago
Brass gets discolored due to H2S present in the air.
Brass is made of zinc and copper and copper sulfite and zinc sulfide are colored.
Brass reacts with Oxygen and causes corrosion. But corrosion takes years to discolor.
Brass is made of zinc and copper and copper sulfite and zinc sulfide are colored.
Brass reacts with Oxygen and causes corrosion. But corrosion takes years to discolor.
(15)
Chandan kumar said:
1 decade ago
It gets discolored in air because of presence of Hydrogen sulphide in the air Brass constitute zinc and copper and these two elements are Hydro sulphide is a colourless gas and if mixed with others, will get colourless.
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.
$SHIVANSH.RATHOD$ 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.
(1)
Rajeev said:
5 years 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.
Perfit said:
5 years 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.
Raju Mandal said:
1 decade ago
Brass is alloy of Cu and Zn. When it reacts with hydrogen sulfide(H2S).
It forms Cu2S(which is black in color) and ZnH2(which turns greyish on exposure to air at room temp). Hence answer is hydrogen sulfide
It forms Cu2S(which is black in color) and ZnH2(which turns greyish on exposure to air at room temp). Hence answer is hydrogen sulfide
Pawani kumari said:
1 decade ago
Brass constitute zinc and copper and these two elements are transition elements. Among the given options hydrogen sulphide is more electronegative. So when it react with brass, brass get discolored.
BHARAT said:
1 decade ago
Brass constitute zinc and copper and these two elements are transition elements. Among the given options hydrogen sulphide is more electronegative. So when it react with brass, brass get discolored.
Megha said:
6 years ago
Because presence of mixture of hydrogen and sulfide 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.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers