______ is not made of matter

(a)

gold ring

(b)

iron nail

(c)

light ray

(d)

oil drop

Seeds from water-melon can be removed by ________

(a)

hand-picking

(b)

filtration

(c)

magnetic separation

(d)

decantation

Lighter impurities like dust when mixed with rice or pulses can be removed by __________

(a)

filtration

(b)

sedimentation

(c)

decantation

(d)

winnowing

_________is essential to perform winnowing activity.

(a)

Rain

(b)

Soil

(c)

Water

(d)

Air

Filtration method is effective in separating ___________ mixture

(a)

solid-solid

(b)

solid-liquid

(c)

liquid-liquid

(d)

liquid-gas