1
JEE Main 2019 (Online) 10th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Consider the following reduction processes :
Zn2+ + 2e $$ \to $$ Zn(s) ; Eo = – 0.76 V
Ca2+ + 2e $$ \to $$ Ca(s); Eo = –2.87 V
Mg2+ + 2e $$ \to $$ Mg(s) ; Eo = – 2.36 V
Ni2 + 2e $$ \to $$ Ni(s) ; Eo = – 0.25
The reducing power of the metals increases in the order :
A
Ca < Mg < Zn < Ni
B
Ni < Zn < Mg < Ca
C
Zn < Mg < Ni < Ca
D
Ca < Zn < Mg < Ni
2
JEE Main 2019 (Online) 10th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The type of hybridisation and number of lone pair (s) of electrons of Xe in XeOF4, respectively, are:
A
sp3d and 2
B
sp3d2 and 2
C
sp3d and 1
D
sp3d2 and 1
3
JEE Main 2019 (Online) 10th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Which hydrogen in compound (E) is easily replaceable during bromination reaction in presence of light ?

JEE Main 2019 (Online) 10th January Morning Slot Chemistry - Haloalkanes and Haloarenes Question 107 English
A
$$\beta $$ $$-$$ hydrogen
B
$$\alpha $$ $$-$$ hydrogen
C
$$\gamma $$ $$-$$ hydrogen
D
$$\delta $$ $$-$$ hydrogen
4
JEE Main 2019 (Online) 10th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The increasing order of the pKa values of the following compounds is :

JEE Main 2019 (Online) 10th January Morning Slot Chemistry - Alcohols, Phenols and Ethers Question 121 English
A
B < C < D < A
B
B < C < A < D
C
D < A < C < B
D
C < B < A < D
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