1
JEE Main 2022 (Online) 25th July Morning Shift
Numerical
+4
-1
In the given reaction
The number of chiral carbon/s in product A is ___________.
Your input ____
2
JEE Main 2022 (Online) 30th June Morning Shift
Numerical
+4
-1
A hydrocarbon 'X' is found to have molar mass of 80. A 10.0 mg of compound 'X' on hydrogenation consumed 8.40 mL of H2 gas (measured at STP). Ozonolysis of compound 'X' yields only formaldehyde and dialdehyde. The total number of fragments/molecules produced from the ozonolysis of compound 'X' is _____________.
Your input ____
3
JEE Main 2021 (Online) 18th March Evening Shift
Numerical
+4
-1
In Tollen's test for aldehyde, the overall number of electron(s) transferred to the Tollen's reagent formula [Ag(NH3)2]+ per aldehyde group to form silver mirror is ___________. (Round off to the Nearest Integer).
Your input ____
4
JEE Main 2021 (Online) 18th March Evening Shift
Numerical
+4
-1
Consider the above reaction where 6.1 g of Benzoic acid is used to get 7.8 g of m-bromo benzoic acid. The percentage yield of the product is __________
(Round off to the Nearest Integer).
[Given : Atomic masses : C : 12.0 u, H : 1.0 u, O : 16.0 u, Br : 80.0 u]
Your input ____
Questions Asked from Aldehydes, Ketones and Carboxylic Acids (Numerical)
Number in Brackets after Paper Indicates
No. of Questions
JEE Main 2023 (Online) 1st February Morning Shift (1)
JEE Main 2023 (Online) 31st January Evening Shift (1)
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JEE Main 2021 (Online) 18th March Evening Shift (2)
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JEE Main 2020 (Online) 4th September Evening Slot (1)
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