Name the gas that can readily decolourise acidified $KMnO_4$ solution.

Which of the following is a synthetic auxin?

Which one of the following is used in the baking of bread?

$A$ mass $m$ is supported by a massless string wound around a uniform hollow cylinder of mass $m$ and radius $R$. If the string does not slip on the cylinder,with what acceleration will the mass fall on release?

The bond order of individual carbon-carbon bonds in benzene is

Which of the following complexes exhibits the highest paramagnetic behavior? (Where $gly = \text{glycine}$,$en = \text{ethylenediamine}$,and $bpy = \text{bipyridyl}$ moieties) (Atomic numbers: $Ti = 22, V = 23, Fe = 26, Co = 27$)