Choose the correct statements.
$A$. Weight of a substance is the amount of matter present in it.
$B$. Mass is the force exerted by gravity on an object.
$C$. Volume is the amount of space occupied by a substance.
$D$. Temperatures below $0^{\circ} C$ are possible in Celsius scale,but in Kelvin scale negative temperature is not possible.
$E$. Precision refers to the closeness of various measurements for the same quantity.

  • A
    $B, C$ and $D$ Only
  • B
    $A, B$ and $C$ Only
  • C
    $A, D$ and $E$ Only
  • D
    $C, D$ and $E$ Only

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$(a)$ $735 \ torr$
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$2 \times 10^{8}$ atoms of carbon are arranged side by side. Calculate the radius of a carbon atom if the length of this arrangement is $2.4 \, cm$.

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