1
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The Ksp for the following dissociation is 1.6 × 10–5

$$PbC{l_{2(s)}} \leftrightharpoons Pb_{(aq)}^{2 + } + 2Cl_{(aq)}^ - $$

Which of the following choices is correct for a mixture of 300 mL 0.134 M Pb(NO3)2 and 100 mL 0.4 M NaCl ?
A
Q > Ksp
B
Not enough data provided
C
Q < Ksp
D
Q = Ksp
2
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The correct order of heat of combustion for following alkadienes is :
JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Hydrocarbons Question 84 English 1 JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Hydrocarbons Question 84 English 2 JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Hydrocarbons Question 84 English 3
A
(b) < (c) < (a)
B
(a) < (c) < (b)
C
(a) < (b) < (c)
D
(c) < (b) < (a)
3
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
For the following reactions
$$A\buildrel {700K} \over \longrightarrow {\mathop{\rm Product}\nolimits} $$
$$A\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{catalyst}^{500K}} {\mathop{\rm Product}\nolimits} $$
it was found that Ea is decreased by 30 kJ/mol in the presence of catalyst.
If the rate remains unchanged, the activation energy for catalysed reaction is (Assume pre exponential factor is same):
A
198 kJ/mol
B
135 kJ/mol
C
105 kJ/mol
D
75 kJ/mol
4
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The increasing order of basicity for the following intermediates is (from weak to strong)
JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 155 English 1 JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 155 English 2 JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 155 English 3 JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 155 English 4 JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 155 English 5
A
(iii) < (i) < (ii) < (iv) < (v)
B
(iii) < (iv) < (ii) < (i) < (v)
C
(v) < (i) < (iv) < (ii) < (iii)
D
(v) < (iii) < (ii) < (iv) < (i)
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