1

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 ____

2

JEE Main 2021 (Online) 25th February Evening Shift

Numerical

+4

-1

Consider titration of NaOH solution versus 1.25 M oxalic acid solution. At the end point following burette readings were obtained.

(i) 4.5 mL

(ii) 4.5 mL

(iii) 4.4 mL

(iv) 4.4 mL

(v) 4.4 mL

If the volume of oxalic acid taken was 10.0 mL then the molarity of the NaOH solution is ________ M. (Rounded off to the nearest integer)

(i) 4.5 mL

(ii) 4.5 mL

(iii) 4.4 mL

(iv) 4.4 mL

(v) 4.4 mL

If the volume of oxalic acid taken was 10.0 mL then the molarity of the NaOH solution is ________ M. (Rounded off to the nearest integer)

Your input ____

3

JEE Main 2020 (Online) 6th September Morning Slot

Numerical

+4

-0

In an estimation of bromine by Carius method,
1.6 g of an organic compound gave 1.88 g of
AgBr. The mass percentage of bromine in the
compound is _______.

(Atomic mass, Ag = 108, Br = 80 g mol

(Atomic mass, Ag = 108, Br = 80 g mol

^{–1})Your input ____

Questions Asked from Practical Organic Chemistry (Numerical)

Number in Brackets after Paper Indicates No. of Questions

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