Questions

The stability of the ions is determined by the energy of the lone pairs. Carbon has the least effective nuclear charge (Zeff) and so the lone pair on the CH3− ion has the highest energy, making it the least stable ion and so the strongest base. The Zeff increases as we move across the period until we get to fluorine which has the greatest Zeff and so its lone pairs have the lowest energy, making F− the least basic ion.

In order of decreasing basicity they are ranked LiCH3 > LiNH2 > LiOH > LiF. We are dealing with the ions F−, OH−, NH2− and CH3− and so the factor which influences their basicity is the stability of the ion compared to its conjugate acid.

The C.M of Kerala, Pinarayi Vijayan has recently launched e-health program “Jeevan Rekha” to make electronic health records of a population in Thiruvananthapuram.

It is a first-of-its-kind initiative in India to provide a centralised database of healthcare information and efficient service delivery to the people.

The new system would help in creating a good hospital management system and patient-friendly atmosphere in hospitals.

Once data of a patient is centralised, it would help the person get continuous treatment at all hospitals in the state.

Entropy is a measure of disorder . It will be maximum in gases followed by liquids and least in solids.

Hence, here the gas is only hydrogen and it has the highest entropy.