JEE Main 2019 (Online) 12th April Evening Slot | JEE Main Year Wise Previous Years Questions - ExamSIDE.Com

1

JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

The molar solubility of Cd(OH)₂ is 1.84 × 10^–5 M in water. The expected solubility of Cd(OH)₂ in a buffer solution of pH = 12 is :

A

2.49 × 10^–10 M

B

1.84 × 10^–9 M

C

6.23 × 10^–11 M

D

$${{2.49} \over {1.84}} \times {10^{ - 9}}M$$

2

JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

The coordination numbers of Co and Al in [Co(Cl)(en)₂]Cl and K₃[Al(C₂O₄)₃], respectively, are : (en = ethane-1, 2-diamine)

A

3 and 3

B

6 and 6

C

5 and 3

D

5 and 6

3

JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

The compound used in the treatment of lead poisoning is :

A

desferrioxime B

B

Cis-platin

C

D-penicillamine

D

EDTA

4

JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

Thermal decomposition of a Mn compound (X) at 513 K results in compound Y, MnO₂ and gaseous product. MnO₂ reacts with NaCl and concentrated H₂O₄ to give a pungent gas Z. X, Y and Z, respectively, are :

A

KMnO₄, K₂MnO₄ and Cl₂

B

K₂MnO₄, KMnO₄ and SO₂

C

K₃MnO₄, K₂MnO₄ and Cl₂

D

K₂MnO₄, KMnO₄ and Cl₂

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