Which is the correct order of ${\mathrm{IP}}_1$?

Important Questions on Classification of Elements and Periodicity in Properties

MEDIUM

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>EXERCISE-I (Conceptual Questions)>Q 129

What is the value of electron gain enthalpy of ${\mathrm{Na}}^{+}$ if ${\mathrm{IE}}_1$ of $\mathrm{Na}=5.1\mathrm{eV}$?

HARD

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>EXERCISE-I (Conceptual Questions)>Q 130

Identify the wrong statement in the following:

MEDIUM

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>EXERCISE-I (Conceptual Questions)>Q 131

The $1^{\text{st }}$ Ionisation enthalpy of $\mathrm{Na}, \mathrm{Mg}$ and $\mathrm{Si}$ are $496, 737, 776 \mathrm{kJ} {\mathrm{mol}}^{-1}$, respectively then what will be the $1^{\text{st }}$ ionisation enthalpy of $\mathrm{Al}$ in $\mathrm{kJ} {\mathrm{mol}}^{-1}$:

MEDIUM

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>EXERCISE-I (Conceptual Questions)>Q 133

Be²⁺ is isoelectronic with which of the following ions?

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>EXERCISE-II (Previous Year Questions)>Q 1

Correct order of atomic radius is:-

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>EXERCISE-II (Previous Year Questions)>Q 2

Incorrect order of acidic strength is:-

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>EXERCISE-II (Previous Year Questions)>Q 3

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

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>EXERCISE-II (Previous Year Questions)>Q 4

Because of lanthanoid contraction, which of the following pairs of elements have nearly the same atomic radii? (Numbers in the brackets are atomic numbers).