1
JEE Main 2020 (Online) 7th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Consider the following reaction :

$${\left( {C{H_3}} \right)_3}CCH\left( {OH} \right)C{H_3}\buildrel {conc.\,\,\,{H_2}S{O_4}} \over \longrightarrow $$

$${\left( {C{H_3}} \right)_2}CHCH\left( {Br} \right)C{H_3}\buildrel {alc.\,\,KOH} \over \longrightarrow $$

$${\left( {C{H_3}} \right)_2}{\rm{ }}CHCH\left( {Br} \right)C{H_3}\buildrel {{{(C{H_3})}_3}{O^\Theta }{K^ \oplus }} \over \longrightarrow $$

$${\left( {C{H_3}} \right)_2}\mathop C\limits_{\mathop |\limits_{OH} } - C{H_2} - CHO\buildrel \Delta \over \longrightarrow $$

Which of these reaction(s) will not produce Saytzeff product ?
A
(d) only
B
(b) and (d)
C
(a), (c) and (d)
D
(c) only
2
JEE Main 2020 (Online) 7th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Oxidation number of potassium in K2O. K2O2 and KO2 respectively is :
A
+1, +2 and + 4
B
+1, +1 and + 1
C
+2, +1 and $$ + {1 \over 2}$$
D
+1, +4, and +2
3
JEE Main 2020 (Online) 7th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The atomic radius of Ag is closed to :
A
Au
B
Cu
C
Hg
D
Ni
4
JEE Main 2020 (Online) 7th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A solution of m-chloronailimne, m-chlorophenol and m-chlorobenzoic acid in ethyal acetate was extracted initially with a saturated solution of NaHCO3 to give fraction A. The left over organic phase was extracted with dilute NaoH solution tio give fraction B. The final organiic layer was labelled as fraction C. Fractions A,B and C, contain respectively :
A
m-chlorobenzoic acid, m-chloroaniline and m-chlorophenol.
B
m-chlorobenzoic acid, m-chlorophenol and m-chloroaniline.
C
m-chlorophenol, m-chlorobenzoic acid and m-chloronailine.
D
m-chloroaniline m-chlorobenzoic acid and m-chlorophenol.

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