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Assertion (A): Atomic mass of potassium ...

Assertion (A): Atomic mass of potassium is 39.
Reason (R ): An atom of postassium is 39 times heavier than `1//2th` of the mass of carbon atom `(C^(12))`.

A

If both (A) and (R ) are correct and (R ) is the correct explantion for (A)

B

If both (A) and (R ) are correct but (R ) is not the correct explantion for (A)

C

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

D

If (A) and (R ) are incorrect.

Text Solution

Verified by Experts

The correct Answer is:
A
Factual statement.
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Knowledge Check

  • Assertion : Atomic mass of aluminium is 27. Reason : An atom of aluminium is 27 times heavier than 1/12th of the mass of carbon-12 atom.

    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.

  • Assertion : Atomic mass of aluminium is 27. Reason : An atom of aluminium is 27 times heavier than 1/12th of the mass of carbon-12 atom.

    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.

  • Assertion : Atomic mass of Na is 23. Reason : An atom of sodium is 23 times heavier than 1/12th mass of C-12 isotope.

    A
    If both Assertion & Reason are true and the reason is the correct explanation of the assertion.
    B
    If both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
    C
    If Assertion is true statement but Reason is false.
    D
    If both Assertion and Reason are false statements.