Nitrogen

The correct answer is (B) :
Reaction :

The correct answer is (C) : 3

N₂O, N₂O₃ and N₂O₄ contain N — N bond

NH₃ gas is neutralized by 2⋅5mL of 2M H₂SO₄

∴ Moles of NH₃ neutralized = millimole
= moles

∴ Weight of N present in compound will be
=
= 0⋅14g

% of ‘N’ in compound
= ×100=56%

To determine the truthfulness of the given statements, let's analyze each one.

Statement I: Dumas method is used for estimation of "Nitrogen" in an organic compound.

This statement is true. The Dumas method is a classic method used in organic chemistry for the quantitative estimation of nitrogen in organic compounds. It involves heating the compound in the presence of excess oxygen to convert bound nitrogen into nitrogen gas (N₂), which is then measured volumetrically.

Statement II: Dumas method involves the formation of ammonium sulfate by heating the organic compound with concentrated H₂SO₄.

This statement is false. The Dumas method does not involve formation of ammonium sulfate, nor does it utilize concentrated sulfuric acid (H₂SO₄). Instead, the compound is combusted in an oxygen-rich environment to form nitrogen gas. The statement seems to be confusing with Kjeldahl's method, which involves converting nitrogen to ammonium sulfate using sulfuric acid.

Thus, the correct answer is: Statement I is true but Statement II is false.