MCQ
The labelled carbon goes with


- A$Ph-\overset{14}{\mathop{C{{O}_{2}}}}H$
- ✓$\overset{14}{\mathop{C{{O}_{2}}}}\,$
- C$Ph-\overset{14}{\mathop{C{{H}_{2}}}}\,-C{{O}_{2}}H$
- D$\overset{14}{\mathop{C{{H}_{4}}}}\,$

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$2 A ( g ) \rightarrow A _{2}( g )$
at $298\, K , \Delta U^ \ominus,=-20\, kJ\, mol ^{-1}, \Delta S \odot=-30\, J$$K ^{-1}\, mol ^{-1},$ then the $\Delta G ^{\ominus}$ will be........$J$
What is the $A$ product
(Round off to the Nearest Integer) [Given : $R =8.314 \,J mol ^{-1} K ^{-1}$. Assume,
hydrogen is an ideal gas] [Atomic mass off $Fe$ is $55.85\, u$ ]
$3.0$ $moles$ of $\mathrm{PCl}_{5}$ is introduced in a $1\, \mathrm{~L}$ closed reaction vessel at $380\, \mathrm{~K}$. The number of moles of $\mathrm{PCl}_{5}$ at equilibrium is $.....\,\times 10^{-3}$. (Round off to the Nearest Integer)