आधुनिक आवर्त सारणी के किस वर्ग में हैलोजन है- )a7th b)17th c) 12th d) 18th
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hlo bro pata nhi kya bol raha hai nhi malum kya bolna chata hai tu
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rhddnd
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12th why the hal of party on my chanala
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