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1
JEE Main 2020 (Online) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
5 g of zinc is treated separately with an excess of

(a) dilute hydrochloric acid and
(b) aqueous sodium hydroxide.

The ratio of the volumes of H2 evolved in these two reactions is :
A
1 : 2
B
1 : 1
C
1 : 4
D
2 : 1
2
JEE Main 2020 (Online) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The solubility product of Cr(OH)3 at 298 K is 6.0 × 10–31. The concentration of hydroxide ions in a saturated solution of Cr(OH)3 will be :
A
(2.22 × 10–31)1/4
B
(4.86 × 10–29)1/4
C
(18 × 10–31)1/4
D
(18 × 10–31)1/2
3
JEE Main 2020 (Online) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The decreasing order of basicity of the following amines is : JEE Main 2020 (Online) 9th January Evening Slot Chemistry - Compounds Containing Nitrogen Question 198 English 1 JEE Main 2020 (Online) 9th January Evening Slot Chemistry - Compounds Containing Nitrogen Question 198 English 2 JEE Main 2020 (Online) 9th January Evening Slot Chemistry - Compounds Containing Nitrogen Question 198 English 3 JEE Main 2020 (Online) 9th January Evening Slot Chemistry - Compounds Containing Nitrogen Question 198 English 4
A
(III) > (II) > (I) > (IV)
B
(I) > (III) > (IV) > (II)
C
(III) > (I) > (II) > (IV)
D
(II) > (III) > (IV) > (I)
4
JEE Main 2020 (Online) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In the figure shown below reactant A (represented by square) is in equilibrium with product B (represented by circle). The equilibrium constant is : JEE Main 2020 (Online) 9th January Evening Slot Chemistry - Chemical Equilibrium Question 87 English
A
1
B
2
C
8
D
4

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