Acid is that which will give H+ ions when disslobed in water.
BaO when dissolved in water form Ba(OH)2.
HF when dissolved in water gives H+ ions and F- ions.
C2H6 is a nonpolar covalent compound and it remains as it is in water.
CsOH will gives Cs+ ions and OH- ions when dissolved in water.
So, out of available options HF is acidic in nature.
Therefore, 2nd option is the correct answer.
Please give good rating.
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