1) Which of the following are uses of chromium?
1) Plating by chromium
2) Making stainless steel
3) Wood Preservative
a. 1, 3
b. 1, 2
c. 2, 3
d. All of the above
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Answer
Explanation
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ANSWER: All of the above
Explanation:
It has variety of uses - Stainless steel, the main corrosion-proof metal alloy, is formed when chromium is added to iron in sufficient concentrations, usually above 11%.
- Because of their toxicity, chromium (VI) salts are used for the preservation of wood. As they kill bacteria, fungi, etc.
- Tanning of leather
- Used in dyes and pigments; Chrome yellow colour
- Used to give glass an emerald green colour. It is responsible for the green colour of emeralds and the red colour of rubies.
- Compounds are used in the textile industry as mordants.
- Used by the aircraft and other industries for anodising aluminium.
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