MCQ
The commonest disaccharide has the molecular formula
- A${C_{10}}{H_{18}}{O_9}$
- B${C_{10}}{H_{20}}{O_{10}}$
- C${C_{18}}{H_{22}}{O_{11}}$
- ✓${C_{12}}{H_{22}}{O_{11}}$
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| $\Delta H \,(kJ/mol)$ | |
| $\frac 12 A \rightarrow B$ | $+150$ |
| $3B \rightarrow 2C + D$ | $-125$ |
| $E + A \rightarrow 2D$ | $+350$ |
For $B + D \rightarrow E + 2C, \Delta H$ will be ............. $\mathrm{kJ/mol}$
(Nearest integer)
[Use : Molal Freezing point depression constant of water $\left.=1.86 \,\mathrm{~K} \,\mathrm{~kg} \,\mathrm{~mol}^{-1}\right]$
Freezing Point of water $=273\, \mathrm{~K}$
Atomic masses : $\mathrm{C}: 12.0\, \mathrm{u}, \mathrm{O}: 16.0\, \mathrm{u}, \mathrm{H}: 1.0\, \mathrm{u}]$