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 20 of 26.
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.
Supreem said:
1 decade ago
Why brass discolored in the presence of hydrogen sulphide?
Please describe this?
Please describe this?
Stylish said:
1 decade ago
Zinc and copper (mostly copper) oxidizes in air to form white zinc oxide and red copper oxide.
Ananya thakur said:
1 decade ago
I am very intrested in science but I don't understand anything but I think option B is correct.
Dipali dhakoliya said:
1 decade ago
In brass the aluminium is present which is less reactive then hydrogen sulfide and it lose the colour.
Shrinu said:
1 decade ago
It is B presence of hydrogen sulphide in air and reacts oxidation then colour changes.
Ashish mishra m.pharm said:
1 decade ago
Because in the present of hydrogen sulphite in air cause oxidation reaction hence colour is change.
Purvi said:
1 decade ago
Its a hydrogen sulphide which discolours the brass which is a composition of cu and zn.
Swayamprava dikshit said:
1 decade ago
brass is an alloy of zn & cu. in present of atmosprere it reacts as
zn+cu+h2s=cu2s+znh.
cu2s coloured the alloy black & znh brings colours of faint red.
zn+cu+h2s=cu2s+znh.
cu2s coloured the alloy black & znh brings colours of faint red.
Shashikant said:
1 decade ago
As brass is metal made up from copper and zink it gets rusted from h2s present in air.
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