The most stable trihalide of nitrogen is :

In the given reaction sequence, the major product 'C' is :

Two statements are given below :

Statement I : The melting point of monocarboxylic acid with even number of carbon atoms is higher than that of with odd number of carbon atoms acid immediately below and above it in the series.

Statement II : The solubility of monocarboxylic acids in water decreases with increase in molar mass.

Choose the most appropriate option :

Which of the following is an example of conjugated diketone?