Classification of elements and periodicity in properties practice · Mixed difficulty

Observe the following statement VIII. The physical and chemical properties of elements are periodic functions of their electronic configuration. IX. Electronegativity of fluorine is less than the electronegativity of chlorine. X. Electropositive nature decreases from top to bottom in a group. The correct answer is

The first ionisation potential is maximum for :

Regarding electron gain enthalpy (magnitude) the correct relation is

A) ${S}>{Se}>{Te}>{O}$

B) ${Cl}>{Br}>{F}>{I}$

C) ${Ne}>{Ar}>{Xe}>{He}$

Which of the following groups in modern periodic table have largest number of elements

Which of the following statements is correct regarding Newlands's law of Octaves?

Select the correct statement

Which among the following elements have largest value of 3rd IP.

Which group of the periodic table contains all the three (gas, liquid and solid) type of element :

Maximum number of orbitals in $3^{\text {rd }}$ excited state of $L i^{+2}=x$. Electronegativity (Pauling scale) of most electronegative element $=y$. Then find value of $\left(\frac{x}{y}\right)$.

Which of the following is arranged in decreasing order of size?

Which of the following possess positive electron gain enthalpy?

Which has the highest ionization energy for the removal
of the second electron?

Amongst the following elements the configuration having the highest ionization energy is:

Which of the following electronic configuration in the outermost shell is characteristic of alkali metals

The elements with atomic numbers 101 and 104 belong to, respectively,

Correct order of second I . P is

Assertion: In a period on going left to right Ionisation energy decrease.
Reason: In a period on moving left to right nuclear charge outweighs the shielding.

Assertion (A): ${Na}^{+}$ and ${Al}^{3+}$ are isoelectronic species.
Reason (R): $Na$ belongs to $s$-block, while ${Al}$ belongs to $p$-block.

Second electron gain enthalpy

The stable oxidation state of thallium, a $II{I_A}$ ______ group element is

Which of the following statements is wrong ?

The elements which are characterized by the outer shell configurations $n{s^{1 - 2}}$ to $n{p^{1 - 5}}$ are collectively called

Symbol of element having atomic number 118 is

In a periodic table the basic character of oxides:

Mendeleev corrected the atomic mass of:

Which of the following shows diagonal relationship

Which of the following species show maximum ionisation energy

Given below are two statements.

Statement – I: Negative electron gain enthalpy of fluorine is greater than chlorine.

Statement – II: Ionisation enthalpy of fluorine is less than chlorine.

In the light of above statements, choose the most appropriate answer from the options given below.

Assertion : Ionisation potential of $\mathrm{Li}^{+}$ is greater than $\mathrm{He}$.

Reason : $\mathrm{Z}_{\text {eff}}$ of $\mathrm{Li}^{+}$ is greater than $\mathrm{He}$.

Given below are two statements:
Statement I: The pentavalent oxide of group-15 element, ${E_2}{O_5}$, is less acidic than trivalent oxide, ${E_2}{O_3}$, of the same element.
Statement II: The acidic character of trivalent oxide of group 15 elements, ${E_2}{O_3}$, decreases down the group.
In light of the above statements, choose most appropriate answer from the options given below: