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Q 3142123033.     `10ml` of `1 N HCI , 25 ml` of `2 N H_2SO_4` and `40 ml` of `X N HNO,` are mixed and made up to `2000` ml. `100 ml` of this solution required `30 ml` of `NaOH` taken from a solution containing `4 g` of NaOH in `250 ml` of solution. What is the value of X?
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)