Classification of Elements and Periodicity in Properties

Select the incorrect statement about modern periodic table (memory based jee mains shift-1 24/01/2025)

Which of the following statements are NOT true about the periodic table?
A. The properties of elements are function of atomic weights.
B. The properties of elements are function of atomic numbers.
C. Elements having similar outer electronic configurations are arranged in same period.
D. An element's location reflects the quantum numbers of the last filled orbital.
E. The number of elements in a period is same as the number of atomic orbitals available in energy level that is
being filled.
Choose the correct answer from the options given below:

[JEE Main 2025, 24 Jan (Shift 1)]

The incorrect decreasing order of atomic radii is:

Memory Based Question 28/Jan/25 Morning shift

The incorrect decreasing order of atomic radii is

[JEE Main 2025, 28 Jan (Shift 1)]

Given below are two statements

Statement-I: A plot of \(\sqrt{\mathrm{v}}\) (v = frequency of X-rays emitted) Vs atomic mass is a straight line

Statement-II: A plot of v (v = frequency of X-rays emitted) Vs atomic number is a straight line

In the light of above statements, choose the correct answer from the options given below

[JEE Main 2025, 23 Jan (Shift 2)]

An element ' E ' has the ionisation enthalpy value of \(374kJmo{l}^{-1}\). ' E ' reacts with elements A, B, C and D with electron gain enthalpy values of -328,-349,-325 and \(-295kJmo{l}^{-1}\), respectively. The correct order of the products EA, EB, EC and ED in terms of ionic character is :

Statement -1: Correct order of ionic radius for \({\mathrm{Mg}}^{2+},{\mathrm{Na}}^{+},{\mathrm{O}}^{2-}\mathrm{and}{\mathrm{F}}^{-}\) is \({\mathrm{F}}^{-}>{\mathrm{O}}^{2-}>{\mathrm{Na}}^{+}>{\mathrm{Mg}}^{2+}\)

Statement -2: The correct order of magnitude of electron gain enthalpy for the 17th group follows the order Cl>F>Br >I (Magnitude only )

(Memory based 29 Jan /2025 morning shift )

The successive 5 ionisation energies of an element are 800, 2427, 3658, 25024 and 32824 kJ/mol, respectively. By using the above values predict the group in which the above element is present :

The correct sequence of electron gain enthalpy of the elements listed below is
A. \(Ar\)
B. \(Br\)
C. \(F\)
D. \(S\)

Choose the most appropriate from the options given below:

[JEE Main 2024, 31 Jan (Shift 1)]

The ionic radii in (\({A}^{^\circ }\)) of \({N}^{3-},{O}^{2-}\)and \({F}^{-}\) are respectively.

The type of oxide formed by the element among Li , Na , Be , Mg , B and Al that has the least atomic radius is:

[JEE Main 2025, 29 Jan (Shift 2)]

Which of the following has maximum size :

\({\mathrm{Al}}^{3+},{\mathrm{Mg}}^{2+},{\mathrm{F}}^{-},{\mathrm{Na}}^{+}\)

(Memory Based JEE Mains 22/01/2025)

Which of the following electronegativity order is incorrect?

[JEE Main 2025, 22 Jan (Shift 1)]

Given below are two statements :
Statement (I) : The radii of isoelectronic species increases in the order

\(M{g}^{2+}

Statement (II) : The magnitude of electron gain enthalpy of halogen decreases in the order, Cl>F>Br>I
In the light of the above statements, choose the most appropriate answer from the options given below:

The element that does not belong to the same period of the remaining elements (modern periodic table) is:

[JEE Main 2025, 23 Jan (Shift 1)]

The electron affinity value are negative for
A. \(\mathrm{Be}\to {\mathrm{Be}}^{-}\)
B. \(\mathrm{N}\to {\mathrm{N}}^{-}\)
C. \(\mathrm{O}\to {\mathrm{O}}^{2-}\)
D. \(\mathrm{Na}\to {\mathrm{Na}}^{-}\)
E. \(\mathrm{Al}\to {\mathrm{Al}}^{-}\)

Choose the most appropriate answer from the options given below :

[JEE Main 2024, 6 Apr (Shift 1)]

Which of the following electronegativity order is incorrect?

(Memory Based JEE Mains 22/01/2025 ,Shift -1)

Arrange the bonds in order of increasing ionic character in the molecules. \(LiF , K _2 O , N _2, SO _2\) and \(ClF _3\) :

The correct decreasing order of electronegativity is:

(Memory Based JEE Mains 22/01/2025 Shift-1)

The correct decreasing order of electronegativity is:

(Memory Based JEE Mains 22/01/2025 Shift-1)

Given below are two statements :

Statement (I): An element in the extreme left of the periodic table forms acidic oxides.

Statement (II) : Acid is formed during the reaction between water and oxide of a reactive element present in the extreme right of the periodic table.

In the light of the above statements, choose the correct answer from the options given below

Select the incorrect statement about modern periodic table (memory based jee mains shift-1 24/01/2025)

The correct order of first ionization enthalpy values of the following elements is:

(A) O (B) N (C) Be (D) F (E) B

Choose the correct answer from the options given below:

The statement(s) that are correct about the species

\({\mathrm{O}}^{2−},{\mathrm{F}}^{−},{\text{Na}}^{+}{\text{ and Mg}}^{2+}\)

(A) All are isoelectronic
(B) All have the same nuclear charge
(C) \({\mathrm{O}}^{2-}\) has the largest ionic radii
(D) \({\mathrm{Mg}}^{2+}\) has the smallest ionic radii

Choose the most appropriate answer from the options given below:

In case of isoelectronic species the size of \(F ^{-}, Ne\) and \(Na ^{+}\)is affected by :

[JEE Main 2024, 1 Feb (Shift 1)]

The element having the highest first ionization enthalpy is

[JEE Main 2024, 29 Jan (Shift 2)]

Which of the following has maximum size :

\({\mathrm{Al}}^{3+},{\mathrm{Mg}}^{2+},{\mathrm{F}}^{-},{\mathrm{Na}}^{+}\)

(Memory Based JEE Mains 22/01/2025)

The atomic number of the element unnilennium is

The first ionization energy (in \( \mathrm{kJ} / \mathrm{mol} \) ) of \( \mathrm{Na}, \mathrm{Mg}, \mathrm{Al} \) and Si respectively, are: