MCQ
Which of the following is not paramagnetic
- A${O_2}$
- B$O_2^{1 + }$
- ✓$O_2^{2 - }$
- D$O_2^ - $
$O_2^ - $ has one unpaired, $O_2^{2 - }$ has zero unpaired electrons, $O_2^{1+ }$ has one unpaired.
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$C ( s )+\frac{1}{2} O _{2}( g ) \rightarrow CO ( g )+100 \;kJ$
When coal of purity $60 \%$ is allowed to burn in presence of insufficient oxygen, $60 \%$ of carbon is converted into $'CO'$ and the remaining is converted into $'CO _{2}$$'$.
The heat generated when $0.6 \;kg$ of coal is burnt is