(A) 3.1 yr(B)25 yr(C)37.5 yr(D)50 yr21.Assertion (A): Fe2+ salt is boiled withConc. HNO, or H2O2 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

(A) 3.1 yr(B)25 yr(C)37.5 yr(D)50 yr21.Assertion (A): Fe2+ salt is b

1.	(A) 3.1 yr(B)25 yr(C)37.5 yr(D)50 yr21.Assertion (A): Fe2+ salt is boiled withConc. HNO, or H2O2 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
Answer» sertion (A): Fe2+ salt is boiled WITHCONC. HNO, or H2O2 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