The structures of four organic compounds are shown below.

Which compounds decolourise bromine water?

Q. Butyric acid is an organic compound containing only C, H and O and is a component of rancid butter. If 0.44 g of butyric acid is burnt in excess oxygen, it yields 0.88 g of $C{O}_2$ and 0.36 g of water as the only products. The empirical formula of butyric acid is:

Q. An organic compound A has only H, C and O. Compound A give red solid on reaction with 2, 4 D.N.P reagent. A react with $O{H}^{-}/\Delta$ to give B as one of product


Then most probable structure of A can be

Q. Two organic compounds $\underset{–}{R}$ and $\underset{–}{S}$, both containing only $C$ and $H$ yield on analysis, the same percentage composition by weight.
$C=\left(12/13\right)\times 100$% and $H=\left(1/13\right)\times 100$%.
$\underset{–}{R}$ decolourises $B{r}_2$ - water but $\underset{–}{S}$ does not.

Q. According to Vital Force Theory, the organic compounds are formed and synthesized only within living species.