You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Chemistry

Trend in Ionisation Enthalpy

Assertion :En...

Question

Assertion :Energy of electron in 1st orbit of $H e^{+}$ is more than that in Hydrogen atom. Reason: Nuclear charge is more in $H e^{+}$ than in Hydrogen.

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

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

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!

Both Assertion and Reason are incorrect

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

Open in App

Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
As $E$ is directly proportional to $Z^{2}$ energy of $H e^{+}$ is more then $H$ which results due to more nuclear charge in $H e^{+}$ ion.

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.

Q. Assertion:

{Mg}^{2 +}

and

{Al}^{3 +}

are isoelectronic but ionic radius

{Al}^{3 +}

is less than that of

{Mg}^{2 +}

.
Reason: The effective nuclear charge on the outer-shell electrons in

{Al}^{3 +}

is more than that in

{Mg}^{2 +}

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.

Q. Assertion
If BOD level of water in reservoir is less than 5 ppm it is not polluted.

Reason
High biological oxygen demand means low activity of bacteria in water.

Assertion (A) p-nitrophenol is more acidic than phenol.
Reason (R) Nitro group helps in the stabilisation of the phenoxide ion by dispersal of negative charge due to resonance.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Join BYJU'S Learning Program

Assertion :Energy of electron in 1st orbit of He+ is more than that in Hydrogen atom. Reason: Nuclear charge is more in He+ than in Hydrogen.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for AssertionAs E is directly proportional toZ2 energy of He+ is more then H which results due to more nuclear charge in He+ ion.

Assertion :Energy of electron in 1st orbit of $H e^{+}$ is more than that in Hydrogen atom. Reason: Nuclear charge is more in $H e^{+}$ than in Hydrogen.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
As $E$ is directly proportional to $Z^{2}$ energy of $H e^{+}$ is more then $H$ which results due to more nuclear charge in $H e^{+}$ ion.