Identify the wrong statement in the following :

Important Questions on Classification of Elements and Periodicity in Properties

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

The species $\mathrm{A}\mathrm{r},\mathrm{ }{\mathrm{K}}^{+}$ and $\mathrm{C}{\mathrm{a}}^{2+}\mathrm{ }$ contain the same number of electrons. In which order do their radii increase?

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

In comparison to boron, beryllium has:

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

The ionic radii of ${\mathrm{O}}^{2–}, {\mathrm{F}}^{–}, {\mathrm{Na}}^{+}$ and ${\mathrm{Mg}}^{2+}$ are in the order:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

The correct order of ionic size of ${\mathrm{N}}^{3-},{\mathrm{Na}}^{+},{\mathrm{F}}^{-},{\mathrm{Mg}}^{2+}$ and ${\mathrm{O}}^{2-}$ is : 

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

The effective nuclear charge of an element with three valence electrons is $2.60$ . What is the atomic number of the element?

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

The correct order of the ionic radii of ${\mathrm{O}}^{2-},{\mathrm{N}}^{3-},{\mathrm{F}}^{-},{\mathrm{Mg}}^{2+},{\mathrm{Na}}^{+}$ and ${\mathrm{Al}}^{3+}$ is :
 

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

Which of the following orders of ionic radii is correctly represented?

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

Covalent bond length of a chlorine molecule is $1.98 \stackrel{\mathrm{o}}{\mathrm{A}}$. Covalent radius (in $\stackrel{\mathrm{o}}{\mathrm{A}}$) of chlorine atom is _________

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

Among the element Li, N, C and Be, one with the largest atomic radius is

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

Which one of the following has largest ionic radius ?

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

Which of the following arrangements is correct regarding the three types of radii for an atom?

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

Identify the element that forms amphoteric oxide:

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

The effective nuclear charge for an electron in $\mathrm{n}=2$ shell in a fluorine atom will be, (calculated according to Slater's rules):

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

The correct order of atomic radii is:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

What is the correct order of atomic radii of the following atoms?

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

In the elements of the second period of the modern periodic table, the decrease in atomic radius $\left(\mathrm{pm}\right)$ is maximum with respect to

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

Among the isoelectronic ions$\left({\mathrm{O}}^{2-}, {\mathrm{N}}^{3-}, {\mathrm{Mg}}^{2+}, {\mathrm{Na}}^{+}\right),$ the ions with the least and the highest ionic radius are, respectively

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

The size of the iso-electronic species $\mathrm{C}{\mathrm{l}}^{-}$ , Ar and $\mathrm{C}{\mathrm{a}}^{2+}$ is affected by:

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

The ionic radii $\left(\text{in}\mathrm{ Å}\right)$ of ${\mathrm{N}}^{3-},\mathrm{ }{\mathrm{O}}^{2-}\mathrm{ }$ and $\mathrm{ }{\mathrm{F}}^{-}\mathrm{ }$ are respectively:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodicity in Properties

The first ionization enthalpies of $\mathrm{Be}, \mathrm{B}, \mathrm{N}$ and $\mathrm{O}$ follow the order