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{:(,अ,"",ब),(1,"फॉसफीन","(अ)","मिश्रित ऑ...

`{:(,अ,"",ब),(1,"फॉसफीन","(अ)","मिश्रित ऑक्साइड"),(2,"सम्पर्क विधि","(ब)",H_2SO_4),(3,"हँसाने बाली गैस","(स)",PH_3),(4,CaCN_2+C,"(द)",NO_2),(5,Pb_3O_4,"(य)","नाइट्रोलियम"):}`

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