What is the formula of hydrated salt of barium chloride if 36.6 g of salt on strong heating gives 5.4 g H₂O ? [Given: Atomic mass of Ba=137] an H₂O → BaCl₂ no (D) BaCl,.5H,O 19 (A)BaCl₂.7H₂O B BaCl,.2H₂O (C) BaCl₂.3H₂O A​