First slide

PH scale, PH of strong acids and strong bases

Question

Choose the correct one which is the weakest acid.

Moderate

A

HCI
B

HF
C

$H_{2} {SO}_{4}$
D

${HNO}_{3}$

Solution

Higher the tendency to give $H^{+}$ ion (i.e. to undergo ionisation), stronger will be the acid or vice-versa.
HF has poor tendency to give $H^{+}$ ion, hence it is the weakest acid among the given. The order of acidity of given acids is $H_{2} {SO}_{4} > {HNO}_{3} > HCl > HF$ .

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