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1. Some basic concept of chemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry1. Some basic concept of chemistry1 Mark
MCQ
A compound contains $10^{-2} \%$ of phosphorus. If atomic mass of phosphorus is $31$,  the molecular mass of the compound having one phosphorus atom per molecule is  :-
  • A
    $31$
  • B
    $31 \times 10^2$
  • ✓
    $31 \times 10^4$
  • D
    $31 \times 10^3$
✓

Answer

Correct option: C.
$31 \times 10^4$
c
$M=\frac{31 \times 100}{0.01}=31 \times 10^{4}$

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