For purifying drinking water, Alum (Phitkari) is used _____?

پینے کے پانی کو صاف کرنے کے لئے ، پھٹکڑی کیوں استعمال کی جاتی ہے؟

To kill bacteria

To remove gases

For solidification of mud

None of these

Alum (Phitkari) is used in water purification as a coagulant.

It helps in solidifying and settling suspended particles (like mud) by clumping them together, making the water clearer.