Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chapter 2 Is Matter Around Us Pure > MCQ > Flashcards

MCQ Flashcards

You may prefer our related Brainscape-certified flashcards:
U.S. Geography flashcards
1
Q

Four samples A, B, C, D are prepared by adding a pinch of copper sulphate, a spatula of copper sulphate, a spatula of chalk
powder, and some milk, to water respectively.
Which one is the colloidal solution among them?
a. C
b. D
c. B
d. A

A

b. D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which of these will form a clear and transparent solution:
a. A
b. B
c. A and B
d. B and D

A

c. A and B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Which of these will exhibit the Tyndall effect?
a. A and D
b. B and C
c. A and B
d. D

A

d. D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Which of the following represents a chemical change?
a. Extraction of copper from copper pyrites
b. Distillation of water
c. Melting of wax
d. Dissolution of salt in water

A

a. Extraction of copper from copper pyrites

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The sequence of steps for separating a mixture of salt, sand and camphor is:
a. Adding water, filtration, evaporation, sublimation
b. Adding water, filtration, sublimation, evaporation
c. Sublimation, adding water, filtration, evaporation
d. Sublimation, adding water, evaporation, filtration

A

c. Sublimation, adding water, filtration, evaporation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Which of the following is the correct set of apparatus for fractional distillation?
a. Round bottomed flask, thermometer, water condenser and beaker
b. Round bottomed flask, thermometer, air condenser and beaker
c. Round bottomed flask, thermometer, fractionating column, water condenser and flask
d. Round bottomed flask, thermometer, fractionating column, air condenser and flask

A

c. Round bottomed flask, thermometer, fractionating column, water condenser and flask

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

In the separation of dyes A and B by chromatography, component B has more solubility in the solvent. Which
component will rise faster?
a. A
b. B
c. Both at the same speed
d. Separation of dyes is independent of the solubility in solvent

A

b. B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

. Different components can be separated from petroleum by:
a. FiltrationA
b. Chromatography
c. Simple distillation
d. Fractional distillation

A

d. Fractional distillation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the name of the metal which exists in liquid state at room temperature?
(a) Sodium
(b) Potassium
(c) Mercury
(d) Bromine

A

(c) Mercury

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Mixture of two or more metals , or metals and non-metals called as…………
(a) Alloy
(b) Solution
(c) Mixture
(d) Metallic mixture

A

(a) Alloy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Sol and gel are examples of
(a) Solid-solid colloids
(b) Sol is a solid-liquid colloid and gel is liquid solid colloid
(c) Sol is solid-solid colloid and gel is solid-liquid colloid
(d) Sol is a liquid-solid colloid and gel is a solid-liquid colloid

A

(b) Sol is a solid-liquid colloid and gel is liquid solid colloid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which of the following elements is not a metalloid?
(a) Boron
(b) Silicon
(c) Germanium
(d) Tungsten

A

(d) Tungsten

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Centrifugation do not used in………..
(a) Diagnostic laboratories
(b) Separate butter and cream
(c) To separate water and sugar
(d) Used in washing machines

A

(c) To separate water and sugar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

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

A

(b) an element

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which of the following methods would you use to separate cream from milk?
(a) Fractional distillation
(b) Distillation
(c) Centrifugation
(d) Filtration

A

(c) Centrifugation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How one can separate ammonium chloride from a mixture containing ammonium chloride and sodium chloride?
(a) Precipitation
(b) Sublimation
(c) Chromatography
(d) Cetrifugation

A

(b) Sublimation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Separation of dyes and black ink using ……………………. Method.
(a) Dissolution
(b) Chromatographic
(c) Sublimation
(d) Suspension

A

(b) Chromatographic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

If the amount of solute contained in the solution is less than the saturation level…it called as……………
(a) Saturated solution
(b) Unsaturated solution
(c) Homogenous solution
(d) Heterogeneous solutio

A

(b) Unsaturated solution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

The component of solution that dissolved in solvent called……………
(a) Solute
(b) Sugar
(c) Solvent
(d) Mixture

A

(c) Solvent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

If the solution is 400 ml and solvent is 300ml so what is percentage of solute?
(a) 30
(b) 40
(c) 45
(d) 25

A

(d) 25

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Crystallization method is used to purify………..
(a) Liquid
(b) Gas
(c) Solid
(d) Miscible liquids

A

(c) Solid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

In the separation of dyes A and B by chromatography, component B has more solubility in the solvent. Which
component will rise faster?
a) B
b) A
c) Both at the same speed
d) Separation of dyes is independent of the solubility in solvent

A

b) A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Which of the following is the correct set of apparatus for fractional distillation?
a) Round bottomed flask, thermometer, fractionating column, water condenser and flask
b) Round bottomed flask, thermometer, water condenser and beaker
c) Round bottomed flask, thermometer, air condenser and beaker
d) Round bottomed flask, thermometer, fractionating column, air condenser and flask

A

a) Round bottomed flask, thermometer, fractionating column, water condenser and flask

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

The sequence of steps for separating a mixture of salt, sand and camphor is:
a) Sublimation, adding water, filtration, evaporation
b) Adding water, filtration, evaporation, sublimation
c) Adding water, filtration, sublimation, evaporation
d) Sublimation, adding water, evaporation, filtration

A

a) Sublimation, adding water, filtration, evaporation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Which of the following represents a chemical change?
a) Extraction of copper from copper pyrites
b) Distillation of water
c) Melting of wax
d) Dissolution of salt in water

A

a) Extraction of copper from copper pyrites

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Four samples A, B, C, D are prepared by adding a pinch of copper sulphate, a spatula of copper sulphate, a spatula of chalk
powder, and some milk, to water respectively.
Which of these will exhibit the Tyndall effect?
a) D
b) A and D
c) B and C
d) A and B

A

d) A and B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Four samples A, B, C, D are prepared by adding a pinch of copper sulphate, a spatula of copper sulphate, a spatula of chalk
powder, and some milk, to water respectively.
Which of these will form a clear and transparent solution:
a) A and B
b) A
c) B
d) B and D

A

a) A and B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Four samples A, B, C, D are prepared by adding a pinch of copper sulphate, a spatula of copper sulphate, a spatula of chalk
powder, and some milk, to water respectively.
Which one is the colloidal solution among them?
a) D
b) C
c) B
d) A

A

d) A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

: A mixture of oil and water can be separated by:
a) Separating funnel
b) Sublimation
c) Crystallisation
d) Chromatography

A

a) Separating funnel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

When a bottle of soda water is opened, carbon dioxide escapes, producing a fizz. This is due to:
a) Decrease in solubility on decreasing pressure
b) Decrease in solubility on decreasing temperature
c) Decrease in solubility on increasing temperature
d) Decrease in solubility on increasing pressure

A

a) Decrease in solubility on decreasing pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

: Different components can be separated from petroleum by:
a) Fractional distillation
b) FiltrationA
c) Simple distillation
d) Chromatography

A

a) Fractional distillation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

More than one kind of pure form of matter combines forming………..
(a) Texture
(b) Solution
(c) Mixture
(d) Component

A

(c) Mixture

33
Q

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

A

(c) corrosion and it is a chemical change

34
Q

Mercury and bromine are both
(a) liquid at room temperature
(b) solid at room temperature
(c) gases at room temperature
(d) both (a) and (b)

A

(a) liquid at room temperature

35
Q

Foam is the example of…………
(a) Scattering light
(b) Colloids
(c) Saturated solution
(d) Unsaturated solutions

A

(b) Colloids

36
Q

Chromatographic method used to separate
(a) Colors in dye
(b) Drug from blood
(c) Tea powder from factory
(d) Drugs from blood

A

(c) Tea powder from factory

37
Q

Which of the following is a compound?
(a) Stainless steel
(b) Bronze
(c) Graphite
(d) Hydrogen sulphide

A

d) Hydrogen sulphide

38
Q

.Camphor can be purified by:
(a) Distillation
(b) Filtration
(c) Sedimentation
(d) Sublimation

A

(d) Sublimation

39
Q

Which of the following is considered to be a pure substance?
(a) Granite
(b) Sodium chloride
(c) Muddy water
(d) Milk of magnesia

A

(b) Sodium chloride

40
Q

To prepare iron sulphide, by heating a mixture of iron filings and sulphur powder, we should use a:
(a) Copper dish
(b) Watch glass
(c) China dish
(d) Petri dish

A

(c) China dish

41
Q

.One common method used to separate dyes is:
(a) Filtration
(b) Distillation
(c) Chromatography
(d) Conductivity

A

(c) Chromatography

42
Q

.Magnetism is most beneficial for separating:
(a) Gases and non- metallic liquids
(b) Magnetic solids and solids such as sulfur
(c) Non- metallic solids and solids such as sulfur
(d) Non- magnetic solids from non- magnetic liquids

A

(b) Magnetic solids and solids such as sulfur

43
Q

Salt can be obtained from sea water by:
(a) Filtration
(b) Decantation
(c) Evaporation
(d) Sublimation

A

(c) Evaporation

44
Q

An atom is
(a) the smallest particle of matter known
(b) the smallest particle of a gas
(c) thesmallest indivisible particle of an element that can take part in a chemical reaction
(d) radioactive emission

A

(a) the smallest particle of matter known

45
Q

Air is regarded as a mixture because
(a) it pressure may vary
(b) its temperature may change
(c) its volume changes under different conditions
(d) its composition may vary

A

(d) its composition may vary

46
Q

Which of the following properties is different for solids, liquids and gases?
(a) movement of molecules
(b) particle size of the substance
(c) mass of the substance
(d) energy exchange

A

(a) movement of molecules

47
Q

Which of the following is an example of a mixture ?
(a) Sugar
(b) Brass
(c) CO2
(d) NO3

A
48
Q

Which of the following is not a chemical change ?
(a) rusting of iron
(b) converting water into steam
(c) making curd from milk
(d) heating coal

A

(b) converting water into steam

49
Q

A chemical equation is a means
(a) of representing chemical and physical properties of reactant molecules
(b) of acquiring instructions for the preparation of a compound
(c) or representing a chemical change by means of symbol and formulas
(d) of showing the kind of elements present in a mixture

A

(c) or representing a chemical change by means of symbol and formulas

50
Q

In a balanced chemical equation, the reactant side and the product side have the same number of
(a) atoms
(b) molecules
(c) ions
(d) electrons

A

(a) atoms

51
Q

In the chemical equation,Mg + O2 –→ 2MgO, O2 represents
(a) atoms of oxygen joined together in a molecule
(b) molecules of oxygen
(c) grams of oxygen
(d) mole of oxygen

A

(a) atoms of oxygen joined together in a molecule

52
Q

The chemical formula of a compound does not represent
(a) the total number of atoms in one molecule of the compound
(b) the number of the molecules of the compound
(c) the state of the molecules of the compound
(d) the composition of a molecule of the compound

A

(a) the total number of atoms in one molecule of the compound

53
Q

Which of the following statements about a balanced chemical equation is true ?
(a) mass is conserved
(b) atoms are conserved
(c) mass as well as atoms are conserved
(d) molecules are conserved

A

(c) mass as well as atoms are conserved

54
Q

Boiling point of 10% aqueous solution of common salt at atmospheric pressure is
(a) 100°C
(b) > 100°C
(c) < 100°C
(d) not possible to predict

A

(b) > 100°C

55
Q

The change of state of substance from gas to liquid is called-
(a) melting
(b) boiling
(c) condensation
(d) vaporization

A

(c) condensation

56
Q

: Area under a velocity-time graph gives
(a) distance travelled by a moving object
(b) acceleration of moving object
(c) retardation of a moving object
(d) time taken by a moving object

A

(a) distance travelled by a moving object

57
Q

Who discovered Neutrons?
(a) Dalton
(b) J J Thomson
(c) Chadwick
(d) Daraday

A

(a) Dalton

58
Q

: Principle quantum number describes
(a) size of the orbital
(b) shape of the orbital
(c) spin of the orbital
(d) orientation of the orbital

A

(a) size of the orbital

59
Q

Quantum number value for 2p sub shell are
(a) n = 2, L = 0
(b) n = 2, L = 1
(c) n = 1, L = 0
(d) n = 1, L = 1

A

(b) n = 2, L = 1

60
Q

Who first proposed the atomic theory based on scientific knowledge
(a) John Dalton
(b) Robert Brown
(c) Jones Berzelius
(d) Dmitri Mendeleev

A

(a) John Dalton

61
Q

A nuclear particle that has same mass that of a proton, but no electrical charge is
(a) nuclide
(b) electron
(c) proton
(d) isotope

A

(b) electron

62
Q

Experimentation with cathode ray led to the discovery of
(a) electron
(b) proton
(c) neutron
(d) nucleus

A

(a) electron

63
Q

In the gold foil experiment, most of the particles fired at the foil
(a) bounced back
(b) were absorbed by the foil
(c) passed through the foil
(d) combined at the foil

A

(b) were absorbed by the foil

64
Q

Anode rays were discovered by
(a) Rutherford
(b) Goldstein
(c) J J Thomson
(d) J. Stoney

A

(b) Goldstein

65
Q

In the separation of dyes A and B by chromatography, component B has more solubility in the solvent: Which
component will rise faster?
(a) B
(b) A
(c) Both at the same speed
(d) Separation of dyes is independent of the solubility in solvent

A

(b) A

66
Q

Which of the following is the correct set of apparatus for fractional distillation?
(a) Round bottomed flask, thermometer, fractionating column, water condenser and flask
(b) Round bottomed flask, thermometer, water condenser and beaker
(c) Round bottomed flask, thermometer, air condenser and beaker
(d) Round bottomed flask, thermometer, fractionating column, air condenser and flask

A

(a) Round bottomed flask, thermometer, fractionating column, water condenser and flask

67
Q

The sequence of steps for separating a mixture of salt, sand and camphor is:
(a) Sublimation, adding water, filtration, evaporation
(b) Adding water, filtration, evaporation, sublimation
(c) Adding water, filtration, sublimation, evaporation
(d) Sublimation, adding water, evaporation, filtration

A

(a) Sublimation, adding water, filtration, evaporation

68
Q

Which of the following represents a chemical change?
(a) Extraction of copper from copper pyrites
(b) Distillation of water
(c) Melting of wax
(d) Dissolution of salt in water

A

(a) Extraction of copper from copper pyrites

69
Q

Four samples A, B, C, D are prepared by adding a pinch of copper sulphate, a spatula of copper sulphate, a spatula of
chalk powder, and some milk, to water respectively:
Which of these will exhibit the Tyndall effect?
(a) D
(b) A and D
(c) B and C
(d) A and B

A

(d) A and B

70
Q

: Four samples A, B, C, D are prepared by adding a pinch of copper sulphate, a spatula of copper sulphate, a spatula of
chalk powder, and some milk, to water respectively:
Which of these will form a clear and transparent solution:
(a) A and B
(b) A
(c) B
(d) B and D

A

(a) A and B

71
Q

Four samples A, B, C, D are prepared by adding a pinch of copper sulphate, a spatula of copper sulphate, a spatula of
chalk powder, and some milk, to water respectively:
Which one is the colloidal solution among them?
(a) D
(b) C
(c) B
(d) A

A

(d) A

72
Q

A mixture of oil and water can be separated by:
(a) Separating funnel
(b) Sublimation
(c) Crystallisation
(d) Chromatography

A

(a) Separating funnel

73
Q

Different components can be separated from petroleum by:
(a) Fractional distillation
(b) FiltrationA
(c) Simple distillation
(d) Chromatography

A

(a) Fractional distillation

74
Q

More than one kind of pure form of matter combines forming………:
(a) Texture
(b) Solution
(c) Mixture
(d) Component

A

(c) Mixture

75
Q

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

A

(c) corrosion and it is a chemical change

76
Q

Air is …………………: mixture:
(a) Heterogeneous
(b) Gas
(c) Solid
(d) Homogenous

A

(c) Solid

77
Q

Sol and gel are examples of
(a) Solid-solid colloids
(b) Sol is a solid-liquid colloid and gel is liquid solid colloid
(c) Sol is solid-solid colloid and gel is solid-liquid colloid
(d) Sol is a liquid-solid colloid and gel is a solid-liquid colloid

A

(b) Sol is a solid-liquid colloid and gel is liquid solid colloid

78
Q

Which of the following elements is not a metalloid?
(a) Boron
(b) Silicon
(c) Germanium
(d) Tungsten

A

(d) Tungsten

Chapter 2 Is Matter Around Us Pure (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions