Embibe Experts Solutions for Chapter: Classification of Elements and Periodicity in Properties, Exercise 1: AP EAPCET 2020 (Sep-23 Shift-1)

Choose the correct option regarding the following statements:
Statement$-1:$Nitrogen has lesser electron gain enthalpy than oxygen.
Statement$-2:$ Oxygen has lesser ionization enthalpy than nitrogen.

The electronegativity of the given elements increases in the order

The first ionization enthalpies of $\mathrm{Mg}$ and $\mathrm{Al}$ can be expected to be

How many of the following statements is/are correct?
a) Mercury is the only metal that exists as liquid at room temperature.
b) Among non-metals, carbon has the highest melting point.
c) Hydrogen is the most abundant element in the universe.
d) Oxygen is the most abundant element in the earth's crust.

The element with maximum bond-energy

The electron configuration of $F{e}^{3+}$ is (atomic number of $Fe=26$)

The element with outer electronic configuration $(n-1)d^{2}n{s}^2$, where $n=4$, would belong to

Among the given configurations, identify the element which doesn't belong to the same family as the others?