JEE Main 2019 (Online) 9th January Morning Slot | Ionic Equilibrium Question 80 | Chemistry | JEE Main - ExamSIDE.com

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JEE Main 2019 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

20 mL of 0.1 M H₂SO₄ solution is added to 30 mL of of 0.2 M NH₄OH solution. The pH of the resultant mixture is : [pk_b of NH₄OH = 4.7].

A

5.2

B

9.0

C

5.0

D

9.4

2

JEE Main 2018 (Offline)

MCQ (Single Correct Answer)

+4

-1

Which of the following salts is the most basic in aqueous solution?

A

Pb(CH₃COO)₂

B

Al(CN)₃

C

CH₃COOK

D

FeCl₃

3

JEE Main 2018 (Offline)

MCQ (Single Correct Answer)

+4

-1

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

A

Base	Acid	End point
Weak	Strong	Colourless to pink

B

Base	Acid	End point
Strong	Strong	Pinkish red to yellow

C

Base	Acid	End point
Weak	Strong	Yellow to pinkish red

D

Base	Acid	End point
Strong	Strong	Pink to colourless

4

JEE Main 2018 (Offline)

MCQ (Single Correct Answer)

+4

-1

An aqueous solution contains an unknown concentration of Ba²⁺. When 50 mL of a 1 M solution of Na₂SO₄ is added, BaSO₄ just begins to precipitate. The final volume is 500 mL. The solubility product of BaSO₄ is 1 $$\times$$ 10^–10. What is the original concentration of Ba²⁺?

A

1.0 $$\times$$ 10^–10 M

B

5 $$\times$$ 10^–9 M

C

2 $$\times$$ 10^–9 M

D

1.1 $$\times$$ 10^–9 M

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