Chemistry 2nd Paper MCQ-Combined All Board-2018

PH value is within $6.4-7.4$

Value of DO is $6 \mathrm{mg} / \mathrm{L}$

Value of BOD is $2 \mathrm{mg} / \mathrm{L}$

Value of COD is $100 \mathrm{mg} / \mathrm{L}$

$1.0 \mathrm{~g}$

$1.4 \mathrm{~g}$

$10.0 \mathrm{~g}$

$14.0 \mathrm{~g}$

$\mathrm{Pb}$

$\mathrm{PbO}$

$\mathrm{PbSO}_{4}$

$\mathrm{PbO}_{2}$

Potassium per-manganate

Methyl orange

Phenolphthalein

Iron (II) solution

Feric chloride

Metalic sodium

Lucas-reagent

Sodium bicarbonate