JEE Main 2018 (Offline) | Practical Organic Chemistry Question 85 | Chemistry

Sodium salt of an organic acid ‘X’ produces effervescence with conc. H₂SO₄. ‘X’ reacts with the acidified aqueous CaCl₂ solution to give a white precipitate which decolourises acidic solution of KMnO₄. ‘X’ is :

CH₃COONa

Na₂C₂O₄

C₆H₅COONa

HCOONa

JEE Main 2016 (Online) 10th April Morning Slot

MCQ (Single Correct Answer)

-1

Sodium extract is heated with concentrated HNO₃ before testing for halogens because :

Silver halides are totally insoluble in nitric acid.

Ag₂S and AgCN are soluble in acidic medium.

S₂⁻ and CN⁻, if present, are decomposed by conc. HNO₃ and hence do not interfere in the test.

Ag reacts faster with halides in acidic medium.

AIEEE 2011

MCQ (Single Correct Answer)

-1

Which of the following reagents may be used to distinguish between phenol and benzoic acid ?

Tollen’s reagent

Molisch reagent

Neutral FeCl₃

Aqueous NaOH

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