Which one of the following pairs of isomers is an example of metamerism?

The IUPAC name of CH₃-C(OH)=CH-CH₂-COOC₂H₅ is:

During halogens test, sodium fusion extract is boiled with concentrated HNO₃ to

The major product ‘A’ of the following given reaction has _________ sp² hybridized carbon atoms.

2, 7-Dimethyl 1-2-6- octadiene <!-- [if gte mso 9]><xml> </xml><![endif]--> A

Major Product

Number of electrophilic centres in the given compounds is _________.

A 0.166 g sample of an organic compound was digested with conc. H₂SO₄ and then distilled with NaOH. The ammonia gas evolved was passed through 50.0 mL of 0.5 N H₂SO₄. The used acid required 30.0 mL of 0.25 N NaOH for complete neutralization. The mass percentage of nitrogen in the organic compound is ___________.