1
JEE Main 2021 (Online) 16th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
An unsaturated hydrocarbon X on ozonolysis gives A. Compound A when warmed with ammonical silver nitrate forms a bright silver mirror along the sides of the test tube. The unsaturated hydrocarbon X is :
A
HC $$ \equiv $$ C $$-$$ CH2 $$-$$ CH3
B
JEE Main 2021 (Online) 16th March Evening Shift Chemistry - Hydrocarbons Question 58 English Option 2
C
CH3 $$-$$ C $$ \equiv $$ C $$-$$ CH3
D
JEE Main 2021 (Online) 16th March Evening Shift Chemistry - Hydrocarbons Question 58 English Option 4
2
JEE Main 2021 (Online) 16th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Which of the following is Lindlar catalyst?
A
Partially deactivated palladised charcoal
B
Zinc chloride and HCl
C
Sodium and Liquid NH3
D
Cold dilute solution of KMnO4
3
JEE Main 2021 (Online) 26th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
In $$\mathop C\limits^1 {H_2} = \mathop C\limits^2 = \mathop C\limits^3 H - \mathop C\limits^4 {H_3}$$ molecule, the hybridization of carbon 1, 2, 3 and 4 respectively, are :
A
sp2, sp, sp2, sp3
B
sp2, sp2, sp2, sp3
C
sp3, sp, sp3, sp3
D
sp2, sp3, sp2, sp3
4
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
The correct sequence of reagents used in the preparation of 4-bromo-2-nitroethyl benzene from benzene is :
A
$$C{H_3}COCl/AlC{l_3},B{r_2}/AlB{r_3},HN{O_3}/{H_2}S{O_4},Zn/HCl$$
B
$$C{H_3}COCl/AlC{l_3},Zn - Hg/HCl,B{r_2}/AlB{r_3},HN{O_3}/{H_2}S{O_4}$$
C
$$B{r_2}/AlB{r_3},C{H_3}COCl/AlC{l_3},HN{O_3}/{H_2}S{O_4},Zn/HCl$$
D
$$HN{O_3}/{H_2}S{O_4},B{r_2}/AlC{l_3},C{H_3}COCl/AlC{l_3},Zn - Hg/HCl$$
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