1
JEE Main 2021 (Online) 26th August Morning Shift
MCQ (Single Correct Answer)
+4
-1
The correct sequential addition of reagents in the preparation of 3-nitrobenzoic acid from benzene is :
A
Br2/AlBr3, HNO3/H2SO4, Mg/ether, CO2, H3O+
B
Br2/AlBr3, NaCN, H3O+, HNO3/H2SO4
C
Br2/AlBr3, HNO3/H2SO4, NaCN, H3O+
D
HNO3/H2SO4, Br2/AlBr3, Mg/ether, CO2, H3O+
2
JEE Main 2021 (Online) 27th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Which one of the following compounds will give orange precipitate when treated with 2, 4-dinitrophenyl hydrazine?
A
JEE Main 2021 (Online) 27th July Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 88 English Option 1
B
JEE Main 2021 (Online) 27th July Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 88 English Option 2
C
JEE Main 2021 (Online) 27th July Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 88 English Option 3
D
JEE Main 2021 (Online) 27th July Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 88 English Option 4
3
JEE Main 2021 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 89 English
Maleic anhydride can prepared by :
A
Heating trans-but-2-enedioic acid
B
Heating cis-but-2-enedioic acid
C
Treating cis-but-2-enedioic acid with alcohol and acid
D
Treating trans-but-2-enedioic acid with alcohol and acid
4
JEE Main 2021 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 90 English
[where $$Et \Rightarrow - {C_2}{H_5}{}^tBu \Rightarrow {(C{H_3})_3}C - $$]

Consider the above reaction sequence, Product "A" and Product "B" formed respectively are :
A
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 90 English Option 1
B
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 90 English Option 2
C
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 90 English Option 3
D
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 90 English Option 4
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