Question

Multiple choice questions
A. Choose the correct option.
1. Apure substance is a substance
a) that consists of only elements
b) that is safe to eat
@ that has only one kind of material
d) that is made up only of atoms
2. Which of these are not mixtures?
(ii) salt
(iii) sugar
(iv) sea water
(ii)and (iii)
d) (i) and (iv)
5. A mixture of sand and iron filings is best
separated by
a) sedimentation b) winnowing
C) magnetic separation d) hand picking
6. A mixture of chalk and common salt in water
can be separated by
a) sedimentation
b) filtration
c) sedimentation and filtration
d) sedimentation and evaporation
(i) air
a) (i) and (ii)
c) (iii) and (iv)
3. In a homogeneous mixture, the
(1) components cannot be seen separately
(ii) components can be seen separately
(ili) components cannot be separated
(iv) components can be separated
a) (i) and (iii)
b) (ii) and (iv)
c) (ii) and (iii)
d) (i) and (iv)
7. A mixture of sand, water and mustard oil can
be separated by
a) sedimentation, decantation and
separating funnel
b) sedimentation, decantation and
evaporation
c) coagulation, evaporation and distillation
d) evaporation, winnowing and sublimation
8. Salt from sea water is obtained by
4. Air is a
a) homogeneous mixture b) compound
c) heterogeneous mixture d) pure substance
a) distillation
c) sedimentation
b) evaporation
d) filtration
45​

Answer 1

Answer:

1. a
2. d
3. a
4. a
5. c

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