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Friday, 9 October

JEE Main 2017 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 2 April 2017 (offline), Chemistry Q44

Question 44 of 90 in this shift, Chemistry question 14 of 30.

A water sample has ppm level concentration of following anions F−=10\mathrm{F^-}=10 ; SO42−=100\mathrm{SO_4^{2-}}=100 ; NO3−=50\mathrm{NO_3^-}=50 The anion/anions that make/makes the water sample unsuitable for drinking is/are :
  1. (1)only F−\mathrm{F^-}Official answer
  2. (2)only SO42−\mathrm{SO_4^{2-}}
  3. (3)only NO3−\mathrm{NO_3^-}
  4. (4)both SO42−\mathrm{SO_4^{2-}} and NO3−\mathrm{NO_3^-}

Official answer

Option 1

CBSE answer key (25/04/2017, used for result).

Chapter
Environmental Chemistry
Topic
Environmental Chemistry
Idea tested
Fluoride Limits in Drinking Water

Same idea in other shifts

Asked 2× in all
  1. 3 Aug 2021, Shift 2 · Q41Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : Fluoride ion…EasyAssertion–reason

Question text from the official JEE Main paper published by NTA (CBSE ran the 2017 exam); answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.