List of top Chemistry Questions on Periodicity of Elements asked in JEE Main

Consider the following sequence of reactions:

4-nitrotoluene
Assuming that the reaction proceeds to completion, then 137 mg of 4-nitrotoluene will produce_______ mg of B. (Given molar mass in g mol⁻¹ H: 1, C: 12, N: 14, O: 16, Br: 80)}

Regarding the hydrides of group 15 elements $EH_3$ $(E = N, P, As, Sb)$, select the correct statement(s):
[A.] The stability of hydrides decreases down the group.
[B.] The basicity of hydrides decreases down the group.
[C.] The reducing character increases down the group.
[D.] The boiling point increases down the group. Choose the correct answer:

``X'' is an oxoanion of the lightest element of group 17 (in the periodic table). The metal is in +6 oxidation state in ``X''. The color of the potassium salt of X is

Choose the INCORRECT statement

The oxidation state of chromium in the final product formed in the reaction between KI and acidified $K_2Cr_2O_7$ solution is:

Elements X and Y belong to Group 15. The difference between the electronegativity values of 'X' and phosphorus is higher than that of the difference between phosphorus and 'Y'. 'X' & 'Y' are respectively

It is noticed that $Pb^{2+}$ is more stable than $Pb^{4+}$ but $Sn^{2+}$ is less stable than $Sn^{4+}$. Observe the following reactions.
$PbO_2 + Pb \to 2PbO ; \Delta_rG^\circ(1)$
$SnO_2 + Sn \to 2SnO ; \Delta_rG^\circ(2)$
Identify the correct set from the following

Given below are two statements:
Statement I: The second ionisation enthalpy of Na is larger than the corresponding ionisation enthalpy of Mg.
Statement II: The ionic radius of $O^{2-$ is larger than that of $F^-$.}

Select incorrect option:

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

In group 17, which property does not follow the regular trend?

First ionisation enthalpy values of the first four group 15 elements are given below. Choose the correct value for the element that is a main component of the apatite family:

For elements B, C, N, Li, Be, O and F, the correct order of first ionization enthalpy is:

Which one of the following when dissolved in water gives coloured solution in nitrogen atmosphere ?

Chalcogen group elements are :

What are the products formed in sequence when excess of $CO_2$ is passed in slaked lime ?

The number of non-ionisable hydrogen atoms present in the final product obtained from the hydrolysis of PCl$_5$ is :

Given below are two statements:
Statement I: $\alpha$ and $\beta$ forms of sulphur can change reversibly between themselves with slow heating or slow cooling.
Statement II: At room temperature the stable crystalline form of sulphur is monoclinic sulphur.

Potassium permanganate on heating at 513 K gives a product which is :