Assertion :In the periodic table of chemical elements, ionisation energy is always found to increase from top to bottom in a group. Reason: In a group, the atomic radii generally increase from top to bottom.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Assertion is correct but Reason is incorrect

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Assertion is incorrect but Reason is correct

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D Assertion is incorrect but Reason is correct
In a group, the atomic radii generally increase from top to bottom due to addition of one shell and thus the ionisation energy decreases as we move from top to bottom in a group.

Suggest Corrections

Similar questions

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

ASSERTION: n-Pentane and n-Hexane belong to a homologous series.

REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - $C H_{2}$ - group.

Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

{CaCO}_{3}

.

Reason:

CaO

formed by decomposition of

{CaCO}_{3}

reacts with

{SiO}_{2}

to form slag.

Q. Assertion : Two electrons of helium atom are placed in only one shell but three electrons of lithium need two shells.
Reason: A shell can have maximum

{2n}^{2}

electrons.

Join BYJU'S Learning Program

Assertion :In the periodic table of chemical elements, ionisation energy is always found to increase from top to bottom in a group. Reason: In a group, the atomic radii generally increase from top to bottom.

The correct option is D Assertion is incorrect but Reason is correctIn a group, the atomic radii generally increase from top to bottom due to addition of one shell and thus the ionisation energy decreases as we move from top to bottom in a group.

The correct option is D Assertion is incorrect but Reason is correct
In a group, the atomic radii generally increase from top to bottom due to addition of one shell and thus the ionisation energy decreases as we move from top to bottom in a group.