Moles of K SO to be dissolved in 12 mol water to lower its vapour pressure by 10 mm Hg at a temperat — NEET Chemistry Past Papers Chemistry Question

Question

Moles of K SO to be dissolved in 12 mol water to lower its vapour pressure by 10 mm Hg at a temperature at which vapour pressure of pure water is 50 mm is : (Assume complete dissociation) (A) 3 mol (B) 2 mol (C) 1 mol (D) 0.5 mol