1
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 74 English 1 JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Hydrocarbons Question 74 English 2 JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Hydrocarbons Question 74 English 3
A
(b) < (c) < (a)
B
(a) < (c) < (b)
C
(a) < (b) < (c)
D
(c) < (b) < (a)
2
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
3
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
According to the following diagram, A reduces BO2 when the temperature is : JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Isolation of Elements Question 81 English
A
> 1400 °C
B
> 1200 °C but < 1400 °C
C
< 1400 °C
D
< 1200 °C
4
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
If the magnetic moment of a dioxygen species is 1.73 B.M, it may be :
A
$$O_2^ - $$ or $$O_2^ + $$
B
O2, $$O_2^ - $$ or $$O_2^ + $$
C
O2 or $$O_2^ + $$
D
O2 or $$O_2^ - $$
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