Q. Among, $Al_{2}O_{3},{SiO}_{2},P_{2}O_{3}and\ {SO}_{2}$ the correct order of acid strength is
A) ${SO}_{2} < P_{2}O_{3} < {SiO}_{2} < Al_{2}O_{3}$
B) ${SiO}_{2} < {SO}_{2} < Al_{2}O_{3} < P_{2}O_{3}$
C) $Al_{2}O_{3} < {SiO}_{2} < {SO}_{2} < P_{2}O_{3}$
D) $Al_{2}O_{3} < {SiO}_{2} < P_{2}O_{3} < {SO}_{2}$
Explanation
(d)
While moving along a group from top to bottom, acidic nature of oxides decreases and along a period left to right acidic nature increases.
amphoteric acidic max. acidic
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Thus, $Al_{2}O_{3} < {SiO}_{2} < P_{2}O_{3} < {SO}_{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.