21. Assertion (A): Fe2+ salt is boiled withConc. HNO, or H,0, prior toprecipitation during gravimetricanalysis.Reason (R): Fe2+ ions precipitatespartially by NH,OH in presence ofammonium salt.(A)(A) and (R) both are correct.and R is the correct explanationof(A).(B)(A) and (R) both are correct,but (R) is not the correctexplanation of (A).(C)(A) is true but (R) is false(D)(A) and (R) both are false

21. Assertion (A): Fe2+ salt is boiled withConc. HNO, or H,0, prior

1.	21. Assertion (A): Fe2+ salt is boiled withConc. HNO, or H,0, prior toprecipitation during gravimetricanalysis.Reason (R): Fe2+ ions precipitatespartially by NH,OH in presence ofammonium salt.(A)(A) and (R) both are correct.and R is the correct explanationof(A).(B)(A) and (R) both are correct,but (R) is not the correctexplanation of (A).(C)(A) is true but (R) is false(D)(A) and (R) both are false
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