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Physical and Chemical Changes — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7SciencePhysical and Chemical Changes1 Mark
MCQ
Chemical formula of rust is:
  • A
    $FeO$
  • B
    $Fe_3​O_4$
  • ✓
    $Fe_2O_3​.xH_2​O$
  • D
    $FeO.xH_2​O$
✓

Answer

Correct option: C.
$Fe_2O_3​.xH_2​O$
C. $Fe_2O_3​.xH_2​O$
Explanation:
Chemical formula of rust is $Fe_2O_3​.xH_2​O$

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