JEE Main 2022 (Online) 25th June Morning Shift | Practical Organic Chemistry Question 20 | Chemistry

JEE Main 2022 (Online) 25th June Morning Shift

MCQ (Single Correct Answer)

-1

Phenol on reaction with dilute nitric acid, gives two products. Which method will be most efficient for large scale separation?

Chromatographic separation

Fractional Crystallisation

Steam distillation

Sublimation

JEE Main 2022 (Online) 24th June Morning Shift

MCQ (Single Correct Answer)

-1

During the qualitative analysis of salt with cation y²⁺, addition of a reagent (X) to alkaline solution of the salt gives a bright red precipitate. The reagent (X) and the cation (y²⁺) present respectively are :

Dimethylglyoxime and Ni²⁺

Dimethylglyoxime and Co²⁺

Nessler's reagent and Hg²⁺

Nessler's reagent and Ni²⁺

JEE Main 2021 (Online) 25th July Morning Shift

MCQ (Single Correct Answer)

-1

Sodium stearate CH₃(CH₂)₁₆COO^$$-$$Na⁺ is an anionic surfactant which forms micelles in oil.

Choose the correct statement for it from the following :

It forms spherical micelles with CH₃(CH₂)₁₆ - group pointing towards the centre of sphere.

It forms non-spherical micelles with -COO^$$-$$ group pointing outwards on the surface.

It forms spherical micelles with CH₃(CH₂)₁₆ - group pointing outwards on the surface of sphere

It forms non-spherical micelles with CH₃(CH₂)₁₆ - group pointing towards the centre.

JEE Main 2021 (Online) 22th July Evening Shift

MCQ (Single Correct Answer)

-1

Which purification technique is used for high boiling organic liquid compound (decomposes near its boiling point)?

Simple distillation

Steam ditillation

Fractional distillation

Reduced pressure distillation