14.3 Assertion: Tetra chlroroethene was earlier used as solvent for dry cleaning, which now a days are discontinued.

Reason: Chlorine gas was used earlier for bleaching.

–I effect ∝ Acidic strength

+I effect ∝ Basic strength

*  Most stable anion due to maximum –I effect.

*  Most acidic

with increase in separation of screen from slits plane, fringe width increases.

Excessive nitrate in drinking water causes methemoglobinemia

Excessive nitrate in drinking water causes methemoglobinemia

Release of toxic/undesirable materials in the environment.