Chemistry · 2019
JEE Main · 11 January 2019, Shift 2 · Q42
The reaction that does NOT define calcination is:
The reaction that does NOT define calcination is :
Official answer
(4)
$\displaystyle 2 \mathrm{Cu}_2 \mathrm{~S}+3 \mathrm{O}_2 \xrightarrow{\Delta} 2 \mathrm{Cu}_2 \mathrm{O}+2 \mathrm{SO}_2$
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JEE Main 2019 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.