If an object of mass 1 kg contains `4xx10^(20)` atoms. If one electron is removed from every atom of the solid, the charge gained by the solid in 1 g is

Options

A. 2.8 C
B. `6.4xx10^(-2) C`
C. `3.6xx10^(-3) C`
D. `9.2xx10^(-4) C`

Answer

B

Explanation

Here,
number of electrons removed = number of atoms in 1 g
`or" "n=(4xx10^(20))/(10^(3))=4xx10^(17)`
`therefore" "` charge, q=ne=`4xx10^(17)xx1.6xx10^(-19)C=6.4xx10^(-2)C`