JEE Main 2018 (Offline) | Practical Organic Chemistry Question 50 | Chemistry

JEE Main 2018 (Offline)

MCQ (Single Correct Answer)

-1

An alkali is titrated against an acid with methyl orange as indicator, which of the following is a correct combination?

Base	Acid	End point
Weak	Strong	Colourless to pink

Base	Acid	End point
Strong	Strong	Pinkish red to yellow

Base	Acid	End point
Weak	Strong	Yellow to pinkish red

Base	Acid	End point
Strong	Strong	Pink to colourless

JEE Main 2018 (Online) 15th April Morning Slot

MCQ (Single Correct Answer)

-1

The correct match between items of List-I and List-II is :

List - I		List - II
(A)	Coloured impurity	(P)	Steam distribution
(B)	Mixture of o-nitrophenol and p-nitrophenol	(Q)	Fractional distribution
(C)	Crude Naphtha	(R)	Charcoal treatment
(d)	Mixture of glycerol and sugars	(S)	Distillation under reduced pressure

(A)-(R), (B)-(S), (C)-(P), (D)-(Q)

(A)-(R), (B)-(P), (C)-(S), (D)-(Q)

(A)-(R), (B)-(P), (C)-(Q), (D)-(S)

(A)-(P), (B)-(S), (C)-(R), (D)-(Q)

JEE Main 2017 (Online) 8th April Morning Slot

MCQ (Single Correct Answer)

-1

A solution containing a group-IV cation gives a precipitate on passing H₂S. A solution of this precipitate in dil.HCl produces a white precipitate with NaOH solution and bluish-white precipitate with basic potassium ferrocyanide. The cation is :

Co²⁺

Ni²⁺

Mn²⁺

Zn²⁺

JEE Main 2016 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

-1

The most appropriate method of making egg-albumin sol is :

Break an egg carefully and transfer the transparent part of the content to 100 mL of 5% w/V saline solution and stir well

Break an egg carefully and transfer only the yellow part of the content to 100 mL of 5% w/V saline solution and stir well.

Keep the egg in boiling water for 10 minutes. After removing the shell, transfer the white part of the content to 100 mL of 5% w/V saline solution and homogenize with a mechanical shaker.

Keep the egg in boiling water for 10 minutes. After removing the shell, transfer the yellow part of the content to 100 mL of 5% w/V saline solutionand homogenize with a mechanical shaker.

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