The species Ar, K$^+$ and Ca$^{2+}$ contain the same number of electrons. In which order do their radii increase?

A given metal crystallizes out with a cubic structure having an edge length of $361$ pm. If there are four metal atoms in one unit cell, what is the radius of one atom?

Solubility of the alkaline earth metal sulphates in water decreases in the sequence:

In which of the following options, the order of arrangements does not agree with the variation of property indicated against it?

Lithium has a bcc structure. Its density is $520$ kg m$^{-3}$ and its atomic mass is $6.94$ g mol$^{-1}.$Calculate the edge length of a unit cell of Lithium metal (in pm).$(NA = 6.02 × 10^{23} mol^{−1})$

The element $Z = 114$ has been discovered recently. It will belong to which of the following family/group and electronic configuration?

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts is put under an electric field?

The correct order of atomic radii in group 13 elements is

Which of the following statements is not true for halogens?

Which of the following oxides is most acidic in nature?

Among CaH$_2,$ BeH$_2,$ BaH$_2,$ the order of ionic character is

Which of the following statements is incorrect?

For the second period elements, the correct increasing order of first ionization enthalpy is:

Identify the incorrect match:$\newline$Name IUPAC Official Name$\newline$(a) Unnilunium (i) Mendelevium$\newline$(b) Unniltrium (ii) Lawrencium$\newline$(c) Unnilhexium (iii) Seaborgium$\newline$(d) Unununnium (iv) Darmstadtium

An element has a body-centered cubic (bcc) structure with a cell edge of $288$ pm. The atomic radius is:

Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them.

Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are:

Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is:

In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it?

Identify the incorrect statement from the following

The IUPAC name of an element with atomic number $119$ is:

The element expected to form largest ion to achieve the nearest noble gas configuration is:

$\newline$Using inorganic qualitative analysis, arrange the given increasing group number from O to VI: $\newline$A. Al³⁺ $\newline$B. Cu²⁺ $\newline$C. Ba²⁺ $\newline$D. Co²⁺ $\newline$E. Mg²⁺ $\newline$ $\newline$Choose the correct answer from the options below: