hydrofluoric acid sentence - hydrofluoric acid sentence in Hindi (21-30)

	21.	Hydrofluoric acid was used in glass etching from 1720 onwards.
	22.	It dissolves slowly in hydrofluoric acid to give fluorohafnate anions.
	23.	This byproduct is a minor industrial source of hydrofluoric acid.
	24.	It is insoluble in most acids but soluble in nitric acid and hydrofluoric acid.
	25.	Hydrofluoric acid is used to clean the fronts of buildings and etch glass, officials said.
	26.	The first step in the processing is the reaction of the oxides with hydrofluoric acid:
	27.	Hydrofluoric acid is also toxic, being able to penetrate skin and cause highly painful burns.
	28.	The anhydrous compound hydrogen fluoride is more commonly used than its aqueous solution, hydrofluoric acid.
	29.	Yellow cake uranium oxide powder was reacted with hydrofluoric acid to form gaseous uranium hexafluoride.
	30.	In the late 18th century, hydrofluoric acid was discovered.

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