MCQ
Which of the following decolorise $Br_2$ water solution
- A

- B$CH_3-CH_2-OH$
- ✓$HC \equiv CH$
- D$CH_3-CH_2-Cl$

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(Rounded-off to the nearest integer) $\left[ h =6.63 \times 10^{-34}\, Js , c =3.00 \times 10^{8} \,ms ^{-1}\right.$ $,$ $\left. N _{ A }=6.02 \times 10^{23}\, mol ^{-1}\right]$