Structure of the Atom — Science STD 9 — Question

Immiscible liquids are separated by using a ________. (Separating funnel, Filtration, Distillation)

Farming without the use of chemicals as fertilizers, herbicides, and pesticides is known as __________. (Sustainable farming, Organic farming, Hybrid farming)

A heavy ship floats in water because its __________ density is less than that of water. (Average, High, Low)

In water, the proportion of oxygen and hydrogen is _________ by mass.

The acceleration due to gravity on the moon is about __________ of that on the earth. (One-sixth, Twice, Equal)

If a mixture contains iron filings as one of the constituents, if can be separated by using a ___________.

Temp on Kelvin scale = Temp on Celsius scale + ________. (273, 212, 273)

A sulphide ion has a negative charge because it contains fewer Protons than ____________. (Protons, Electrons, Neutrons)