કાચની સપાટી પર કાયમી માર્ક બનાવવા માટે વપરાયેલ એસિડ કયો છે ?
A$HNO_3$
B$HF$
C$HIO_3$
D$H_2SO_4$
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b hydrofluoride (\(HF\)) Acid used for making permanent marking on the glass surface is.
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