When $NaCl$ is dissolved in water,the sodium ion becomes

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

The number $\log_{2} 7$ is:

In a metre bridge experiment,the ratio of the left gap resistance to the right gap resistance is $2:3$. The balance point from the left is: (in $~cm$)

The diagram shows the energy levels for an electron in a certain atom. Which transition shown represents the emission of a photon with the most energy?

Which of the following is a pair of functional isomers?