প্রশ্নঃ
কোনটিতে জারণ বিজারণ হয়নি?
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ক.
Mg+Cu++ → Mg+++Cu
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খ.
C+O2 → CO2
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গ.
Ca+++CO2-- → Ca++CO3--
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ঘ.
Fe + 2H+ → Fe++ + H2
উত্তরঃ গ
 Mg+Cu++ → Mg+++Cu খ) C+O2 → CO2 গ) Ca+++CO2-- → Ca++CO3-- ঘ) Fe + 2H+ → Fe++ + H2 উত্তর: গ) Ca+++CO2-- → Ca++CO3--
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