Biology, 22.06.2019 21:00 wrivera32802

Brass gets discoloured in air because of the presence of which of the following gases in air? a. oxygen b. hydrogen sulphide c. carbon dioxide d. nitrogen


Answer from: tripleog12716

your answer is B

sorry i messed up

Answer from: lightning1157blaze

- Option B.

(Hydrogen Sulfide)

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Answer from: personm21

Hydrogen sulphide

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.

Answer from: tshegofatso92

your answer is B:  Hydrogen sulphide


Answer from: chutcherson020
B. Because of the presence of hydrogen sulphide in Brass, it combines with oxygen in air and form water, evaporates. So remained sulphide is colourless in air .So Brass gets discoloured in the air.
Answer from: jayjat97
B. Hydrogen sulphide
Answer from: gin9
Hydrogen sulphide. 
Answer from: lerinmarie

The answer is option B "Hydrogen sulphide".


The answer is option B because hydrogen sulphide it combines with oxygen in air and form water, evaporates.

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Answer from: alex43079


h my free fire uid 1974723537

Answer from: rcfarlo9342

1.Brass gets discolored in air due to the presence of Oxygen. 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.

2.The metal which exist as a liquid at room temperature is mercury. Non-metal which exist as a liquid at room temperature is bromine.

3.One such chelate is chlorophyll, the green pigment of plants. In chlorophyll the central ion is magnesium, and the large organic molecule is a porphyrin. The porphyrin contains four nitrogen atoms that form bonds to magnesium in a square planar arrangement.

4.Most pencil cores are made of graphite powder mixed with a clay binder. Graphite pencils (traditionally known as "lead pencils") produce grey or black marks that are easily erased, but otherwise resistant to moisture, most chemicals, ultraviolet radiation and natural aging.

5.Almost all metals can form amalgams with mercury, the notable exceptions being iron, platinum, tungsten, and tantalum. Silver-mercury amalgams are important in dentistry, and gold-mercury amalgam is used in the extraction of gold from ore.

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