Assertion : $Packingfraction=isotopicmass−massnumbermassnumber×104$ Reason: Positive value of packing fraction implies for the unstability of nucleus.

Assertion is correct but reason is wrong.

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

Assertion is wrong but reason is correct.

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

Both Assertion and reason are correct and reason is correct explanation of Assertion.

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

Both Assertion and reason are correct but reason is not correct explanation of Assertion

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

Open in App

Solution

The correct option is D Both Assertion and reason are correct but reason is not correct explanation of Assertion
The expression for packing fraction is $Packingfraction=isotopicmass−massnumbermassnumber×104$
When the packing fraction has negative value, the mass number is more than isotopic mass. This means that some mass is converted into binding energy.
This stabilizes the nucleus.
Positive value of packing fraction implies for the unstability of nucleus.
Thus this concept primarily discusses the stability of the nucleus.
Thus, Both S and E are correct but E is not correct explanation of S

Suggest Corrections

Similar questions

Assertion (A) Boiling points of alcohols and ethers are high.
Reason (R) They can form intermolecular hydrogen-bonding.
(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.

Assertion (A) Phenols give o-and p-nitrophenol on nitration with conc. $H N O_{3} a n d H_{2} S O_{4}$ mixture.
Reason (R) - OH group in phenol is o-,p-directing.
(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.

Assertion (A) Ethanol is a weaker acid than phenol.
Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
(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.

Assertion (A) Phenol forms 2, 4, 6-tribromophenol on treatment with $B r_{2}$ in carbon disulphide at 273K.
Reason (R) Bromine polarises in carbon disulphide.
(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.

Assertion (A) o-nitrophenol is less soluble in water than the m- and p-isomers.
Reason (R) m and p-nitrophenols exist as associated molecules.
(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 :Packingfraction=isotopicmass−massnumbermassnumber×104 Reason: Positive value of packing fraction implies for the unstability of nucleus.

Assertion : $Packingfraction=isotopicmass−massnumbermassnumber×104$ Reason: Positive value of packing fraction implies for the unstability of nucleus.