MCQ
Chalcogen group elements are:
- A$Se,$ $\mathrm{Tb}$ and $\mathrm{Pu}$.
- ✓$Se, Te$ and $Po.$
- C$\mathrm{S}, \mathrm{Te}$ and $\mathrm{Pm}$
- D$O, Ti$ and $Po.$
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Acetal $-$ Hemiacetal
The increase in boiling point of solution in benzene in ${ }^{\circ} \mathrm{C}$ is $\mathrm{x} \times 10^{-2}$. The value of $\mathrm{x}$ is ..... .(Nearest integer)
$[$ Atomic mass : $\mathrm{C}=12.0, \mathrm{H}=1.0, \mathrm{O}=16.0]$
$1$. propanal
$2$. trichloroethanal
$3$. methanal
$4$. ethanal
$5$. benzaldehyde
