Question
The electronegativity of the following elements increases in the order
$Si \,<\, P\, <\, C\, < \,N$
In a period, electronegativity increases from left to right. In a group, the electronegativity decreases down the group.
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$(I)$ The principal reducing product is $NO$ gas
$(II)$ $Cu$ metal is oxidised to $Cu^{2+}$ ( aq.) ion which is blue in colour.
$(III)$ $NO$ is paramagnetic and has one unpaired electron in antibonding molecular orbital
$(IV)$ $NO$ reacts with $O_2$ to produce $NO_2$ which is linear in shape
Choose the correct statements
$CaCO _{3( s )}+2 HCl _{( aq )} \rightarrow CaCl _{2( aq )}+ CO _{2( g )}+2 H _{2} O _{( l )}$
[Calculate upto second place of decimal point]