1
JEE Main 2021 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
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JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 130 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
2
JEE Main 2021 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
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JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 131 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 131 English Option 1
B
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 131 English Option 2
C
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 131 English Option 3
D
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 131 English Option 4
3
JEE Main 2021 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
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What is the major product "P" of the following reaction?

JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Compounds Containing Nitrogen Question 132 English
A
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Compounds Containing Nitrogen Question 132 English Option 1
B
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Compounds Containing Nitrogen Question 132 English Option 2
C
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Compounds Containing Nitrogen Question 132 English Option 3
D
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Compounds Containing Nitrogen Question 132 English Option 4
4
JEE Main 2021 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
+4
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Identify the process in which change in the oxidation state is five :
A
$$C{r_2}O_7^{2 - } \to 2C{r^{3 + }}$$
B
$$MnO_4^ - \to M{n^{2 + }}$$
C
$$CrO_4^{2 - } \to C{r^{3 + }}$$
D
$${C_2}O_4^{2 - } \to 2C{O_2}$$
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