Class 12 Chemistry D एवं F ब्लॉक के तत्व | L-4 | लैन्थेनॉइड तत्व | Poonam Mam

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Thank you ma'am

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Na2cro4+H2so4=Na2cr2o7

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Ma'am double our tripal bond kaise our kaha lagta hai please ma'am ek us pr class laye ma'am 🙏

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Ma'am agli class kab loge

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pls mam ek bachche ke wajah se samay mat karab kojiya aap ka bhi samay kjarab aur hamarabhi i hope you understand mis

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