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Grade 9Physical Chemistry

How will you distinguish gas jars of Hydrogen,Oxygen,Nitrogen with burning calcium.
How will you test the products formed in the above reactions.

Profile image of saurav
11 Years agoGrade 9
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1 Answer

Profile image of Naveen Kumar
11 Years ago
Calcium burns quite vigorously in oxygen and strong heating is required to make it burn. It gives abrick redflame to produce awhite powderof calcium oxide.
Calcium + oxygen —> calcium oxide
2Ca(s) + O2(g) —> 2CaO(s)

Calcium + Hydrogen —> calcium hydride
Ca(s) + H2(g) —> CaH2(s)
(Grey coloured)

Calcium + nitrogen —> calcium nitride
3 Ca + N2→ Ca3N2(Red Brown solid formed)

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