Home
Class 12
PHYSICS
Assertion : Generally heavy nuclei are u...

Assertion : Generally heavy nuclei are unstable.
Reason : It has more neutrons and protons.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

Why are heavy nuclei usually unstable?

Assertion (A) : Neutrons have no charge but protons are positively charged, hence net result is repulsion in them in the nucleus of an atom. In the presence of this repulsion the nucleus is highly stable. Reason (R) : The pair of nucleons (neutrons and protons) continuously exchanges the charge through mesons which may either be positively or negatively charged.

Assertion :-HCl is more polar than HF. Reason :- Cl has more E.N. than F.

Assertion : Nuclei having number about 60 are most stable. Reason : When two or more light nuclei are combined into a heavier nucleus, then the binding energy per nucleon will increase.

Assertion:Nuclear binding energy per nucleon is in the order - ""_(4)^9Be gt ""_(3)^(7)Li gt ""_(2)^(4)He . Reason:Binding energy per nucleon increases linearly with difference in number of neutrons and protons.

Assertion (A) : Galvanized iron does not rust. Reason (R): Zn has a more negative electrode potential than Fe .

Assertion: hnRNA is larger than mRNNA. Reason: hnRNA has no translating introns and more exons than required for translation.

Assertion: AIDS spreads more rapidly than hepatitis. Reason: HIV has shorter incubation period than that of HBV.

Statements I: The fission of a heavy nucleus is always accompanied with the neutrons along with two product nuclei. Staements II: For a lighter stble nuclide, the N/Z ratio has to be slightly greater than 1.