Is Matter Around Us Pure Test

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Is Matter Around Us Pure Test - 39

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Weekly Quiz Competition

Question 1
1 / -0

A homogeneous looking heterogeneous mixture is called:

A
suspension

B
colloid

C
solution

D
None of the above
Solution
A colloidal solution is a heterogeneous mixture. But it looks homogeneous because its particles are very small in size.
A suspension is heterogeneous and also looks heterogeneous because the particle size is large and the particles are not uniformly spread throughout the mixture.
A solution is a homogeneous mixture.
Question 2
1 / -0

Mixture of sand and camphor can be purified by:

A
seperating funnel

B
distillation

C
cooling

D
sublimation

Solution

Sublimation is used for separating substances with on heating change directly into vapour. The vapour by cooling gives the pure substance in its solid form which is called sublimate. Here camphor will sublime leaving behind the sand.
Question 3
1 / -0

Fruit jellies and milk are:

A
suspensions

B
solutions

C
colloids

D
All of the above

Solution

Milk and jelly are examples of colloids. Milk is an 'emulsion' type of colloid and jelly is a 'gel' type of colloid.
Question 4
1 / -0

What happens when light is passed through a colloidal solution?

A
Path of light through the colloid becomes invisible.

B
Path of light through the colloid becomes visible.

C
There's no effect.

D
There's no scattering of light.

Solution

When a strong beam of light is passed through a colloid kept in a dark room, the path of light becomes visible through the colloid. This happens because of the scattering of light by the particles of the colloid, and this is called Tyndall effect.
Question 5
1 / -0

Type of colloid in which dispersed phase is solid and dispersion medium is liquid is called____

A
sol

B
col

C
solution

D
all of the above

Solution

The components of the colloidal solution are dispersed phase and dispersed medium. Dispersed particles (solute like a component) in a colloid form a dispersed phase and the component in which dispersed phase particles are suspended is called dispersing medium.
Depending upon the physical state of the dispersed phase and dispersed medium the type of colloid is decided. Colloids in which dispersed phase is solid and dispersing medium is liquid is called $$\text{Sol}$$.
For example Milk of magnesia, mud, etc.
Question 6
1 / -0

Large number of pharmaceutical preparation are ................... in nature.

A
Suspension

B
Colloidal

C
Solution

D
None of the above

Solution

Large number of medicines and pharmaceutical preparations are colloidal in nature, since all of them are in fact emulsions.
Question 7
1 / -0

Which of these is a colloid?

A
Urea

B
Blood

C
Cane sugar

D
NaCl

Solution

$$\bf{Hint:}$$ Colloid is a mixture in which very small particles of one substance are distributed evenly throughout another substance.

$$\bf{Explanation:}$$

Blood is a colloidal solution with plasma as a dispersion medium and red blood cells (RBCs), White blood cells (WBC's), platelets as colloidal particles (dispersed phase).
All others like Urea, cane sugar, and NaCl are pure compounds.

$$\bf{Final \ answer:}$$ Option $$B$$
Question 8
1 / -0

Which of the following substances when mixed with sand cannot be separated by sublimation?

A
Sodium chloride

B
Ammonium chloride

C
Iodine

D
Naphthalene

Solution

Sublimation method is used for separating substances which on heating change directly into vapour phase.
Substances like iodine, ammonium chloride, naphthalene sublime on heating. But sodium chloride is non-volatile in nature and thus it does not sublime on heating.
Question 9
1 / -0

Which of the following statement is false?

A
True solutions are homogeneous.

B
True solution are transparent.

C
Suspensions are heterogeneous.

D
Colloidal particles can be separated by filtration.

Solution

In a colloid, the size of particles is between $$10^{-7}$$ m and $$10^{-9}$$ m. So, the constitutions of colloids cannot be separated by filtration.
Question 10
1 / -0

Suspensions are:

A
homogeneous mixtures

B
heterogeneous mixtures

C
Both A and B

D
None of the above

Solution

Suspensions are heterogeneous mixture in which particles of a solid are dispersed in any medium. In suspension, the solute particles do not dissolve but get suspended throughout the bulk of the medium.
Hence, the correct option is $$\text{B}.$$

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Is Matter Around Us Pure Test - 39

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Is Matter Around Us Pure Test - 39

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Question 1

suspension

colloid

solution

None of the above

Solution

Question 2

seperating funnel

distillation

cooling

sublimation

Solution

Question 3

suspensions

solutions

colloids

All of the above

Solution

Question 4

Path of light through the colloid becomes invisible.

Path of light through the colloid becomes visible.

There's no effect.

There's no scattering of light.

Solution

Question 5

sol

col

solution

all of the above

Solution

Question 6

Suspension

Colloidal

Solution

None of the above

Solution

Question 7

Urea

Blood

Cane sugar

NaCl

Solution

Question 8

Sodium chloride

Ammonium chloride

Iodine

Naphthalene

Solution

Question 9

True solutions are homogeneous.

True solution are transparent.

Suspensions are heterogeneous.

Colloidal particles can be separated by filtration.

Solution

Question 10

homogeneous mixtures

heterogeneous mixtures

Both A and B

None of the above

Solution

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