MCQ
Which statement is false
- AElectronegativity of fluorine is maximum
- BElectron affinity of fluorine is maximum
- CBoiling point of fluorine is maximum
- ✓Both $(b)$ and $(c)$
|
Element - |
$F$ |
$Cl$ |
$Br$ |
$I$ |
|
$E.A.$ $kJ/mole$ - |
$332.6$ |
$348.5$ |
$324.7$ |
$295.5$ |
|
Boiling pt ($^oC$)- |
$-188.1$ |
$-34.6$ |
$59.5$ |
$185.2$ |
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Statement $I:$ Primary aliphatic amines react with $HNO _{2}$ to give unstable diazonium salts.
Statement $II:$ Primary aromatic amines react with $HNO _{2}$ to form diazonium salts which are stable even above $300 \,K$.
In the light of the above statements, choose the most appropriate answer from the options given below:
$2B\xrightarrow{k}{B_2}$ [Slow]
${B_2} + A \to D$ [Fast]
The rate law expression, order with respect to $A$, order with respect to $'B'$ and overall order are respectively
Assertion $(A)$ : $\mathrm{S}_{\mathrm{N}} 2$ reaction of $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Br}$ occurs more readily than the $\mathrm{S}_{\mathrm{N}} 2$ reaction of $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{Br}$.
Reason $(R)$ : The partially bonded unhybridized p-orbital that develops in the trigonal bipyramidal transition state is stabilized by conjugation with the phenyl ring.
In the light of the above statements, choose the most appropriate answer from the options given below: