MCQ
Which of the following cannot act as a reducing agent
- A$SO_2$
- B$Cl_2O_3$
- C$NO_2$
- ✓$CO_2$
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$C{l_2}\,(1\,{\mkern 1mu} atm)|\,\,(C{l^ - }(1{\mkern 1mu} M)||C{l^ - }\,(0.1{\mkern 1mu} M)|\,\,C{l_2}\,(2\,{\mkern 1mu} atm)$

| Process | $\Delta H / kJ\,mol ^{-1}$ | $\Delta S / J K^{-1}$ |
| $A$ | $-25$ | $-80$ |
| $B$ | $-22$ | $40$ |
| $C$ | $25$ | $-50$ |
| $D$ | $22$ | $20$ |
The number of non-spontaneous process from the following is $.....$
| Acid | $HF$ | $HCL$ | $HBr$ | $HI$ |
| $K_a$ | $7.2 \times 10^{-4}$ | $1 \times 10^6$ | $1 \times 10^9$ | $3 \times 10^{11}$ |
Which of these Bronsted acids would have the weakest conjugate base ?