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Assertion : atomic mass of aluminium ...

Assertion : atomic mass of aluminium is 27
Reason : an atom of aluminium is 27 times heavier than `(1)/(12 ^(th))` of the mass of the C- 12 atom .

A

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

B

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

C

Assertion is true ,but the reason is false .

D

Assertion is false ,but the reason is true .

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Knowledge Check

  • (1)/(12) of the mass of carbon 12 atom is......

    A
    1 TMC
    B
    mass of neutron
    C
    1 amu
    D
    mass of hydrogen

  • The mass of one C atom is :

    A
    `6.023xx 10^(23) g `
    B
    `1.99 xx 10 ^(-23) g`
    C
    `2.00 g `
    D
    `12 g`

  • The mass of a proton is equal to: 1 (n) of the mass of a C-12 atom

    A
    1 amu
    B
    `1/(12th)` of the mass of a C-12 atom
    C
    zero
    D
    both (a) and (b)

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