वाई सीएच ट्रिपल बॉन्ड सीएच
Lavan se aap kya samajhte hain
सी 2 एच 2
C2H2
रेशम ऑनलाइन है ?
Resham online ho kya
संतोष जी तो आप सही बताओ
Santosh ji to aap hi right btao
Ya CH tripal bond CH
क्या आप भी केमिस्ट्री नहीं जानते हैं?
Kya ji chemistry bhi nhi janti ho
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Chhar ka rasayanik sutra kya hota hai