Chemistry

In diacetamide (CH? CO)? NH), the lone pair of electrons on the nitrogen atom is delocalized through resonance with both adjacent carbonyl groups. This extensive resonance greatly decreases the electron density on the nitrogen atom.

The difference between the first and second ionization energies is significantly higher for alkali metals (like Sodium, Na) compared to alkaline earth metals (like Magnesium, Mg). Therefore, in the context of the problem, X=Na and Y=Mg.

Only 1° amine react with benzene sulphonyl chloride to give a compound which is soluble in alkali

Iron (III) iodide (FeI? ) does not exist because it is unstable. The Fe³? ion is a strong enough oxidizing agent to be easily reduced to Fe²? by the I? ion, which in turn is oxidized.

Oxygen gas (O? ) is not considered a greenhouse gas.

Metal sulphide sols are negatively charged while metal oxide sols are positively charged sols. So, CdS is negative while TiO? is positively charged sol.

In sodium hydride (NaH), hydrogen has an oxidation state of -1. In this state, it can only act as a reducing agent.

Colloidal particles are small enough to pass through an ordinary filter but can be stopped by an ultrafilter paper due to their specific particle size range.

The atomic numbers and classifications for the given elements are: As (Arsenic, atomic no. 33) is a metalloid, I (Iodine, atomic no. 53) is a non-metal, and Bi (Bismuth, atomic no. 83) is a metal.