Which is the product obtained, when $$\mathrm{Br}_2$$ water reacts with glucose?

Propane nitrile on reaction with ethyl magnesium iodide in presence of dry ether gives complex. This imine complex on acid hydrolysis forms

Which of the following is not dihydric phenol?

What is osmotic pressure of a semi molar solution at $$27^{\circ} \mathrm{C}$$ ? $$(R=0.082)$$