Which among the following is an example of emulsion?

Which of the following solutions will not show flow of solvent in either direction when separated by semipermeable membrane?

Identify the correct stability order of following alkenes.

I) $\left(\mathrm{CH}_3\right)_2 \mathrm{C}=\mathrm{C}\left(\mathrm{CH}_3\right)_2$

II) $\left(\mathrm{CH}_3\right)_2 \mathrm{C}=\mathrm{CH}_2$

III) $\left(\mathrm{CH}_3\right)_2 \mathrm{C}=\mathrm{CHCH}_3$

Which of the following element in +1 oxidation state has largest ionic radius?