
is matter around us pure
Authored by CHAITANYA KOTECHA
Chemistry
9th Grade
Used 27+ times

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19 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A sample contains two substances and has uniform properties. The sample is ________?
A compound.
A heterogeneous mixture.
An element.
A homogeneous mixture.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Rusting of an article made up of iron is called
(a) corrosion and it is a physical as well as chemical change
(b) dissolution and it is a physical change
(c) corrosion and it is a chemical change
(d) dissolution and it is a chemical change
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When the liquid is spun rapidly, the denser particles are forced to the bottom and the lighter particles stay at the top. This principle is used in:
(a) Centrifugation
(b) Fractional distillation
(c) Evaporation
(d) Tunneling
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The continuous zig-zag movement of colloidal particles in a dispersion medium is called
(a) Dispersion
(b) Tyndall effect
(c) Brownian movement
(d) Oscillation
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A pure substance which is made up of only one kind of atom and cannot be broken into two or more simpler substances by physical or chemical means is referred to as
(a) a compound
(b) an element
(c) a molecule
(d) a mixture
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When two liquids do not mix, they form two separate layers and are known as
(a) Miscible liquids
(b) Immiscible liquids
(c) Saturated liquids
(d) Super saturated liquids
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How one can separate ammonium chloride from a mixture containing ammonium chloride and sodium chloride?
(a) Precipitation
(b) Sublimation
(c) Chromatography
(d) Cetrifugation
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