1
JEE Main 2021 (Online) 27th August Morning Shift
Numerical
+4
-1
The number of moles of CuO, that will be utilized in Dumas method for estimation nitrogen in a sample of 57.5 g of N, N-dimethylaminopentane is _____________ $$\times$$ 10$$-$$2. (Nearest integer)
Your input ____
2
JEE Main 2021 (Online) 16th March Evening Shift
Numerical
+4
-1
In Duma's method of estimation of nitrogen, 0.1840 g of an organic compound gave 30 mL of nitrogen collected at 287 K and 758 mm of Hg pressure. The percentage composition of nitrogen in the compound is __________. (Round off to the Nearest Integer). [Given : Aqueous tension at 287 K = 14 mm of Hg]
Your input ____
3
JEE Main 2021 (Online) 25th February Morning Slot
Numerical
+4
-1
Using the provided information in the following paper chromatogram :
Fig : Paper chromatography for compounds A and B.
the calculated Rf value of A ________$$\times$$ 10-1.
Fig : Paper chromatography for compounds A and B.
the calculated Rf value of A ________$$\times$$ 10-1.
Your input ____
4
JEE Main 2021 (Online) 24th February Evening Slot
Numerical
+4
-1
1.86 g of aniline completely reacts to form acetanilide. 10% of the product is lost during purification. Amount of acetanilide obtained after purification (in g) is __________ $$\times$$ 10$$-$$2.
Your input ____
Questions Asked from Practical Organic Chemistry (Numerical)
Number in Brackets after Paper Indicates
No. of Questions
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