1
JEE Main 2022 (Online) 24th June Evening Shift
Numerical
+4
-1
Change Language

0.2 g of an organic compound was subjected to estimation of nitrogen by Dumas method in which volume of N2 evolved (at STP) was found to be 22.400 mL. The percentage of nitrogen in the compound is _________. [nearest integer]

(Given : Molar mass of N2 is 28 g mol$$-$$1. Molar volume of N2 at STP : 22.4 L)

Your input ____
2
JEE Main 2021 (Online) 31st August Evening Shift
Numerical
+4
-1
The transformation occurring in Duma's method is given below :

$${C_2}{H_7}N + \left( {2x + {y \over 2}} \right)CuO \to xC{O_2} + {y \over 2}{H_2}O + {z \over 2}{N_2} + \left( {2x + {y \over 2}} \right)Cu$$

The value of y is ______________. (Integer answer)
Your input ____
3
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 ____
4
JEE Main 2021 (Online) 27th August Morning Shift
Numerical
+4
-1
When 10 mL of an aqueous solution of KMnO4 was titrated in acidic medium, equal volume of 0.1 M of an aqueous solution of ferrous sulphate was required for complete discharge of colour. The strength of KMnO4 in grams per litre is __________ $$\times$$ 10$$-$$2. (Nearest integer)

[Atomic mass of K = 39, Mn = 55, O = 16]
Your input ____
JEE Main Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12