Dichloromethane

Vapour pressure of methyl alcohol and dichloromethane at 27^@ C are 100 mm Hg and 350 mm Hg respectively. Vapour pressure of the solution obtained by mixing 1.5 mole of methyl alcohol and 0.5 mole of dichloromethane at 27^@ C is

An organic compound B is formed by the reaction of ethylmagnesium iodide (CH_(3)CH_(2)MgI) with a substance A, followed by treatment with dilute aqueous acid. Compound B does not react with PC C in dichloromethane. Identify A ?

Vapour pressure of pure chloroform (CHCl_(3)) and dichloromethane (CH_(2)Cl_(2)) at 25^(@)C are 200 mmHg and 41.5 mmHg respectively. Vapour pressure of the solution obtained by mixing 25.5 g of CHCl_(3) and 40 g of CH_(2)Cl_(2) at the same temperature will be : (Molecular mass of CHCl_(3) = 119.5 u and molecular mass of CH_(2)Cl_(2) = 85u )