A 10% solution of which of the following substances shall have maximum OP ?

One molar solution of which substance will have maximum OP

If equal mass of following substance are taken the which will have maximum number of molecles.

The vapour pressure of a 10% aqueous solution of a non volatile substance at 373K is 740 mm of Hg. Calculate the molecular mass of the solute.

A certain length of 50% solution produces an optical rotation of 20^(@). How much length of 10% solution of the same substance will produce a rotation of 30^(@)

If 10% of a radioactive substance decays in every 5 year, then the percentage of the substance that will have decaed in 20 years will be .

If 10% of a radioactive substance decays in every 5 year, then the percentage of the substance that will have decaed in 20 years will be .