List of top Chemistry Questions on Periodic Table asked in JEE Main

In period 4 of the periodic table, the elements with highest and lowest atomic radii respectively are:


The correct sequence of reagents for the above conversion of X to Y is :

Which of the following represents the correct trend for the mentioned property?
A. F $>$ P $>$ S $>$ B \quad -- First Ionization Energy
B. Cl $>$ F $>$ S $>$ P \quad -- Electron Affinity
C. K $>$ Al $>$ Mg $>$ B \quad -- Metallic character
D. K₂O $>$ Na₂O $>$ MgO $>$ Al₂O₃ \quad -- Basic character
Choose the correct answer from the options given below:
Statement-I : $\text{K}>\text{Mg}>\text{Al}>\text{B}$ metallic character order. Statement-II: Ionic radius of any element is less than its atomic radius.
Which of the following electronegativity order is incorrect?

Which of the following Statements are NOT true about the periodic table? 
A. The properties of elements are a function of atomic weights. 
B. The properties of elements are a function of atomic numbers. 
C. Elements having similar outer electronic configuration are arranged in the 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 the same as the number of atomic orbitals available in the energy level that is being filled.

Heat treatment of muscular pain involves radiation of wavelength of about 900 nm. Which spectral line of H atom is suitable for this? Given: Rydberg constant \( R_H = 10^5 \, \text{cm}^{-1} \), \( h = 6.6 \times 10^{-34} \, \text{J s} \), and \( c = 3 \times 10^8 \, \text{m/s} \)
The property/properties that show irregularity in the first four elements of group-17 are:

Match the LIST-I with LIST-II.

LIST-ILIST-II
A.Pnicogen (group 15)I.Ts
B.Chalcogen (group 16)II.Og
C.Halogen (group 17)III.Lv
D.Noble gas (group 18)IV.Mc

Choose the correct answer from the options given below :

Which of the following statements are correct? 
A. The process of the addition an electron to a neutral gaseous atom is always exothermic 
B. The process of removing an electron from an isolated gaseous atom is always endothermic 
C. The 1st ionization energy of the boron is less than that of the beryllium 
D. The electronegativity of C is 2.5 in $ CH_4 $ and $ CCl_4 $ 
E. Li is the most electropositive among elements of group 1 
Choose the correct answer from the options given below

Atomic number of element with lowest first ionisation enthalpy is:
Which of the following has the highest atomic number?
The element that does not belong to the same period of the remaining elements (modern periodic table) is:
Radius of the first excited state of Helium ion is given as:
\(a_0\) = radius of first stationary state of hydrogen atom.

Match List-I with List-II:

Given below are two statements: Statement (I): According to the Law of Octaves, the elements were arranged in the increasing order of their atomic number.
Statement (II): Meyer observed a periodically repeated pattern upon plotting physical properties of certain elements against their respective atomic numbers. In the light of the above statements, choose the correct answer from the options given below:
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: The first ionisation enthalpy decreases across a period.
Reason R: The increasing nuclear charge outweighs the shielding across the period.
In the light of the above statements, choose the most appropriate from the options given below:
Given below are two statements:
Statement (I) : Oxygen being the first member of group 16 exhibits only –2 oxidation state.
Statement (II) : Down the group 16 stability of +4 oxidation state decreases and +6 oxidation state increases.
In the light of the above statements, choose the most appropriate answer from the options given below:
If IUPAC name of an element is “Unununnium” then the element belongs to nth group of periodic table. The value of n is______
Given below are the two statements: one is labelled as Assertion (A) and the other is labeled as Reason (R).
Assertion (A): There is a considerable increase in covalent radius from N to P. However from As to Bi only a small increase in covalent radius is observed.
Reason (R): covalent and ionic radii in a particular oxidation state increases down the group.
In the light of the above statement, choose the most appropriate answer from the options given below:
Which one of the following lanthanides exhibits +2 oxidation state with diamagnetic nature ? (Given Z for Nd=60, Yb=70, La=57, Ce=58)
In the structure of the dichromate ion, there is a :
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Metallic character decreases and non-metallic character increases on moving from left to right in a period.
Reason (R) : It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.
In the light of the above statements, choose the most appropriate answer from the options given below :