1

JEE Main 2022 (Online) 24th June Evening Shift

Numerical

+4

-1

0.2 g of an organic compound was subjected to estimation of nitrogen by Dumas method in which volume of N_{2} evolved (at STP) was found to be 22.400 mL. The percentage of nitrogen in the compound is _________. [nearest integer]

(Given : Molar mass of N_{2} is 28 g mol^{$$-$$1}. Molar volume of N_{2} 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)

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

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 KMnO

[Atomic mass of K = 39, Mn = 55, O = 16]

_{4}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 KMnO_{4}in grams per litre is __________ $$\times$$ 10^{$$-$$2}. (Nearest integer)[Atomic mass of K = 39, Mn = 55, O = 16]

Your input ____

Questions Asked from Practical Organic Chemistry (Numerical)

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