MCQ
Among the following acids, the strongest acid is
- A$NCCH _{2} COOH$
- B$O _{2} NCH _{2} COOH$
- ✓$F _{3} CCOOH$
- D$Cl _{3} CCOOH$
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[where $Et$ is $- C _{2} H _{5}$ ]
Compound $'A'$
| Exp | $[A]_0$ | $[B]_0$ | initial rate |
| $1$ | $0.012$ | $0.035$ | $0.10$ |
| $2$ | $0.024$ | $0.035$ | $0.80$ |
| $3$ | $0.012$ | $0.070$ | $0.10$ |
| $4$ | $0.024$ | $0.070$ | $0.80$ |
$C + 2S \to CS_2 ; \,\Delta H_f^o = +117.0\,kJ\,mol^{-1} .......(1)$
$C + O_2 \to CO_2 ; \,\Delta H_f^o = -393\,kJ\,mol^{-1} .......(2)$
$S + O_2 \to SO_2 ; \, \Delta H_f^o = -297\,kJ\,mol^{-1} .......(3)$
The heat of reaction of
$CS_2 + 3O_2 \to CO_2 + 2SO_2$ is
.....$kJ\,mol^{-1}$

