MCQ
The bond angle in ammonia molecule is
- A${91^o}8'$
- B${93^o}3'$
- ✓${106^o}45'$
- D${109^o}28'$
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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
