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RRB Group-D Model Paper 17 with answers for online practice
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© examsnet.com
Question : 44
Total: 100
Which of the below is an alloy of mercury?
Brass
Nichrome
Electrum
Amalgam
Validate
Solution:
Amalgam is a special class of alloys in which one metal is mercury.
Silver amalgam is the amalgam used for a dental filling.
Gold amalgam is the amalgam used in the extraction of gold from ore.
The metal mercury is kept inside an iron container because iron doesn't form an amalgam with iron
Mercury is a chemical element with atomic number 80.
Mercury is also known as quicksilver.
Mercury is the metal that is liquid at room temperature.
Mercury is the first known superconductor.
Cinnabar is the ore of mercury.
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