Home
Class 12
CHEMISTRY
Assertion (A) : The nucleus of gold is s...

Assertion `(A) :` The nucleus of gold is stable even though there is a very strong coulombic repulsion among the protons.
Reason `(R) : ` The inverse square coulomb force is exactly balanced by another inverse square force which is very powerful. `i.e., ` nuclear force.

A

If both `(A)` and `(R)` are correct , and `(R)` is the correct explanation of `(A)`

B

If both `(A)` and `(R)` are correct, but (R) is not the correct explanation of `(A)`

C

If `(A)` is correct, but `(R)` is incorrect.

D

If `(A)` is incorrect, but `(R)` is correct.

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the assertion and reason provided in the question, we will break down the concepts involved step by step. ### Step 1: Understand the Assertion The assertion states that the nucleus of gold is stable despite the strong Coulombic repulsion among protons. - **Explanation**: In a gold nucleus, there are protons, which are positively charged. According to Coulomb's law, like charges repel each other. Therefore, the protons in the nucleus experience a repulsive force due to their positive charges. ### Step 2: Understand the Reason The reason provided states that the Coulombic force is balanced by another inverse square force, which is the nuclear force. - **Explanation**: The nuclear force is an attractive force that acts between nucleons (protons and neutrons) in the nucleus. It is much stronger than the Coulombic force at very short distances (on the order of femtometers). However, it is important to note that the nuclear force does not follow an inverse square law like the Coulombic force does. ### Step 3: Evaluate the Assertion and Reason - **Assertion (A)**: The assertion is correct because the nucleus of gold is indeed stable, even with the repulsive forces acting between protons. - **Reason (R)**: The reason is incorrect because it incorrectly states that the nuclear force is an inverse square force. The nuclear force is not characterized by an inverse square relationship; it operates over short ranges and is not dependent on distance in the same way that the Coulombic force is. ### Conclusion - The assertion is true, while the reason is false. Therefore, the correct answer is that the assertion is correct, but the reason is incorrect. ### Final Answer - Assertion (A) is correct; Reason (R) is incorrect. The answer is option C. ---
Promotional Banner

Topper's Solved these Questions

  • NUCLEAR CHEMISTRY

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercise Fill In The Blanks|30 Videos

  • NUCLEAR CHEMISTRY

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercise True/False|20 Videos

  • NUCLEAR CHEMISTRY

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercises Single Correct|80 Videos

  • NCERT BASED EXERCISE

    CENGAGE CHEMISTRY ENGLISH|Exercise Nuclear Chemistry (NCERT Exercise)|29 Videos

  • ORGANIC COMPOUNDS WITH FUNCTIONAL GROUP

    CENGAGE CHEMISTRY ENGLISH|Exercise Archives Analytical And Descriptive|24 Videos

Similar Questions

Explore conceptually related problems

Assertion : Nuclear forces arise from strong coulombic interactions between protons and neutrons Reason : Nuclear forces are independent of charge of the nucleons

Assertion: Electrons in the atom are held due to coulomb forces. Reason: The atom is stable only because the centripetal force due to Coulomb's law is balanced by the centrifugal force.

Assertion (A) : No interfrence pattern is detected when two coherent sources are very closer to each other. (i.e separation almost zero) Reason (R ) : The fringe width is inversely proportional to the distance between the two slits

Assertion : Coulomb force and gravitational force follow the same inverse-square law. Reason : Both laws are same in all aspects.

Assertion: Magnetic force between two short magnets, when they are co-axial follows inverse square law of distance. Reason: The magnetic forces between two poles do not follow inverse square law of distance.

Assertion : Unlike electric force and gravitational forces, nuclear force has limited range. Reason : Nuclear force do not obey inverse square law.

Assertion : Protons carrying positive charges are compactly residing inside the nucleus. Reason : Electrostatic repulsive force between protons is very weak.

The compound unstabel nucleus ._(92)^(236)U often decays in accordance with the following reaction ._(92)^(236)U rarr ._(54)^(140)Xe +._(38)^(94)Sr + other particles During the reaction, the uranium nucleus ''fissions'' (splits) into the two smaller nuceli have higher nuclear binding energy per nucleon (although the lighter nuclei have lower total nuclear binding energies, because they contain fewer nucleons). Inside a nucleus, the nucleons (protons and neutrons)attract each other with a ''strong nuclear'' force. All neutrons exert approxiamtely the same strong nuclear force on each other. This force holds the nuclear are very close together at intranuclear distances. Why is a ._2^4He nucleus more stable than a ._3^4Li nucleus?

The compound unstabel nucleus ._(92)^(236)U often decays in accordance with the following reaction ._(92)^(236)U rarr ._(54)^(140)Xe +._(38)^(94)Sr + other particles During the reaction, the uranium nucleus ''fissions'' (splits) into the two smaller nuceli have higher nuclear binding energy per nucleon (although the lighter nuclei have lower total nuclear binding energies, because they contain fewer nucleons). Inside a nucleus, the nucleons (protonsa and neutrons)attract each other with a ''strong nuclear'' force. All neutrons exert approxiamtely the same strong nuclear force on each other. This force holds the nuclear are very close together at intranuclear distances. Which of the following graphs might represent the relationship between atomic number (i.e., ''atomic weight'') and the total binding energy of the nucleus, for nuclei heavier than ._(38)^(94)Sr ?

The compound unstabel nucleus ._(92)^(236)U often decays in accordance with the following reaction ._(92)^(236)U rarr ._(54)^(140)Xe +._(38)^(94)Sr + other particles During the reaction, the uranium nucleus ''fissions'' (splits) into the two smaller nuceli have higher nuclear binding energy per nucleon (although the lighter nuclei have lower total nuclear binding energies, because they contain fewer nucleons). Inside a nucleus, the nucleons (protonsa and neutrons)attract each other with a ''strong nuclear'' force. All neutrons exert approxiamtely the same strong nuclear force on each other. This force holds the nuclear are very close together at intranuclear distances. A proton and a neutron are both shot at 100 m s^(-1) toward a ._6^(12)C nucleus. Which particle, if either, is more likely to be absorbed by the nucleus?