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← JEE Main 2022 · 26 Jul · Shift 1
ChemistryInteger+4 / -1Question 85 of 90

JEE Main 2022 · 26 Jul · Shift 1, Chemistry question 85

When 800 mL of 0.5 M nitric acid is heated in a beaker, its volume is reduced to half and 11.5 g of nitric acid is evaporated. The molarity of the remaining nitric acid solution is x×10−2x\times10^{-2} M. (Nearest Integer)

(Molar mass of nitric acid is 63 g mol−1^{-1})

Answer and worked solution

Official answer: 54

Moles 0.4−11.563=0.21750.4-\frac{11.5}{63}=0.2175 in 0.4 L: 0.54 M.

Answer: 54