MCQ
A sigma bond is formed by the overlapping of:
- A$s − s$ orbital alone
- B$s$ and $p$ orbital alone.
- ✓$s − s, s − p$ or $p − p$ orbital along internuclear axis.
- D$p − p$ orbital along the sides.
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($1$) The product $S$ is
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($2$) The reactions, $Q$ to $R$ and $R$ to $S$, are
$[A]$ Dehydration and Friedel-Crafts acylation
$[B]$ Aromatic sulfonation and Friedel-Crafts acylation
$[C]$ Friedel-Crafts alkylation, dehydration and Friedel-Crafts acylation
$[D]$ Friedel-Crafts alkylation and Friedel-Crafts acylation
Given the answer quetion ($1$) and ($2$)
$N _{2} O _{4}( g ) \rightleftharpoons 2 NO _{2}( g ) ; \Delta H ^{0}=+58 kJ$
For each of the following cases $(a, b),$ the direction in which the equilibrium shifts is:
$(a)$ Temperature is decreased
$(b)$ Pressure is increased by adding $N _{2}$ at constant $T$