Science - Elements and Metals

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Last updated: April 30, 2017

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First submitted	April 30, 2017
Times taken	138
Average score	54.5%
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Hint	Answer
Galvanized iron sheets have a coating of...	zinc
Inert gas which is substituted for nitrogen in the air used by deep sea divers for breating	helium
Gas usually filled in the electric bulb is	nitrogen
Permanent hardness in water may be removed by the addition of	sodium carbonate
Soda water contains this gas	carbon dioxide
The most important ore of aluminum is	bauxite
What is laughing gas?	nitrous oxide
Diamond is an allotropic form of	carbon
What is the lightest metal?	lithium
In fireworks the green flame is produced by	barium
Marsh gas is	methane