Q. The acidic strength decreases in the order HCl H2S PH3
Kindly refer to the following link:
https://www.meritnation.com/ask-answer/question/according-to-increase-in-strength-of-acids-ph3-h2s-hcl/the-p-block-elements/3736363
https://www.meritnation.com/ask-answer/question/according-to-increase-in-strength-of-acids-ph3-h2s-hcl/the-p-block-elements/3736363