MCQ Flashcards
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
b. D
Which of these will form a clear and transparent solution:
a. A
b. B
c. A and B
d. B and D
c. A and B
Which of these will exhibit the Tyndall effect?
a. A and D
b. B and C
c. A and B
d. D
d. D
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. Extraction of copper from copper pyrites
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
c. Sublimation, adding water, filtration, evaporation
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
c. Round bottomed flask, thermometer, fractionating column, water condenser and flask
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
b. B
. Different components can be separated from petroleum by:
a. FiltrationA
b. Chromatography
c. Simple distillation
d. Fractional distillation
d. Fractional distillation
What is the name of the metal which exists in liquid state at room temperature?
(a) Sodium
(b) Potassium
(c) Mercury
(d) Bromine
(c) Mercury
Mixture of two or more metals , or metals and non-metals called as…………
(a) Alloy
(b) Solution
(c) Mixture
(d) Metallic mixture
(a) Alloy
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
(b) Sol is a solid-liquid colloid and gel is liquid solid colloid
Which of the following elements is not a metalloid?
(a) Boron
(b) Silicon
(c) Germanium
(d) Tungsten
(d) Tungsten
Centrifugation do not used in………..
(a) Diagnostic laboratories
(b) Separate butter and cream
(c) To separate water and sugar
(d) Used in washing machines
(c) To separate water and sugar
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
(b) an element
Which of the following methods would you use to separate cream from milk?
(a) Fractional distillation
(b) Distillation
(c) Centrifugation
(d) Filtration
(c) Centrifugation
How one can separate ammonium chloride from a mixture containing ammonium chloride and sodium chloride?
(a) Precipitation
(b) Sublimation
(c) Chromatography
(d) Cetrifugation
(b) Sublimation
Separation of dyes and black ink using ……………………. Method.
(a) Dissolution
(b) Chromatographic
(c) Sublimation
(d) Suspension
(b) Chromatographic
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
(b) Unsaturated solution
The component of solution that dissolved in solvent called……………
(a) Solute
(b) Sugar
(c) Solvent
(d) Mixture
(c) Solvent
If the solution is 400 ml and solvent is 300ml so what is percentage of solute?
(a) 30
(b) 40
(c) 45
(d) 25
(d) 25
Crystallization method is used to purify………..
(a) Liquid
(b) Gas
(c) Solid
(d) Miscible liquids
(c) Solid
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
b) A
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) Round bottomed flask, thermometer, fractionating column, water condenser and flask
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) Sublimation, adding water, filtration, evaporation
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) Extraction of copper from copper pyrites
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
d) A and B
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 and B
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
d) A
: A mixture of oil and water can be separated by:
a) Separating funnel
b) Sublimation
c) Crystallisation
d) Chromatography
a) Separating funnel
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) Decrease in solubility on decreasing pressure
: Different components can be separated from petroleum by:
a) Fractional distillation
b) FiltrationA
c) Simple distillation
d) Chromatography
a) Fractional distillation
More than one kind of pure form of matter combines forming………..
(a) Texture
(b) Solution
(c) Mixture
(d) Component
(c) Mixture
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
(c) corrosion and it is a chemical change
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) liquid at room temperature
Foam is the example of…………
(a) Scattering light
(b) Colloids
(c) Saturated solution
(d) Unsaturated solutions
(b) Colloids
Chromatographic method used to separate
(a) Colors in dye
(b) Drug from blood
(c) Tea powder from factory
(d) Drugs from blood
(c) Tea powder from factory
Which of the following is a compound?
(a) Stainless steel
(b) Bronze
(c) Graphite
(d) Hydrogen sulphide
d) Hydrogen sulphide
.Camphor can be purified by:
(a) Distillation
(b) Filtration
(c) Sedimentation
(d) Sublimation
(d) Sublimation
Which of the following is considered to be a pure substance?
(a) Granite
(b) Sodium chloride
(c) Muddy water
(d) Milk of magnesia
(b) Sodium chloride
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
(c) China dish
.One common method used to separate dyes is:
(a) Filtration
(b) Distillation
(c) Chromatography
(d) Conductivity
(c) Chromatography
.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
(b) Magnetic solids and solids such as sulfur
Salt can be obtained from sea water by:
(a) Filtration
(b) Decantation
(c) Evaporation
(d) Sublimation
(c) Evaporation
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) the smallest particle of matter known
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
(d) its composition may vary
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) movement of molecules
Which of the following is an example of a mixture ?
(a) Sugar
(b) Brass
(c) CO2
(d) NO3
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
(b) converting water into steam
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
(c) or representing a chemical change by means of symbol and formulas
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) atoms
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) atoms of oxygen joined together in a molecule
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) the total number of atoms in one molecule of the compound
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
(c) mass as well as atoms are conserved
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
(b) > 100°C
The change of state of substance from gas to liquid is called-
(a) melting
(b) boiling
(c) condensation
(d) vaporization
(c) condensation
: 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) distance travelled by a moving object
Who discovered Neutrons?
(a) Dalton
(b) J J Thomson
(c) Chadwick
(d) Daraday
(a) Dalton
: 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) size of the orbital
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
(b) n = 2, L = 1
Who first proposed the atomic theory based on scientific knowledge
(a) John Dalton
(b) Robert Brown
(c) Jones Berzelius
(d) Dmitri Mendeleev
(a) John Dalton
A nuclear particle that has same mass that of a proton, but no electrical charge is
(a) nuclide
(b) electron
(c) proton
(d) isotope
(b) electron
Experimentation with cathode ray led to the discovery of
(a) electron
(b) proton
(c) neutron
(d) nucleus
(a) electron
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
(b) were absorbed by the foil
Anode rays were discovered by
(a) Rutherford
(b) Goldstein
(c) J J Thomson
(d) J. Stoney
(b) Goldstein
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
(b) A
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) Round bottomed flask, thermometer, fractionating column, water condenser and flask
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) Sublimation, adding water, filtration, evaporation
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) Extraction of copper from copper pyrites
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
(d) A and B
: 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 and B
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
(d) A
A mixture of oil and water can be separated by:
(a) Separating funnel
(b) Sublimation
(c) Crystallisation
(d) Chromatography
(a) Separating funnel
Different components can be separated from petroleum by:
(a) Fractional distillation
(b) FiltrationA
(c) Simple distillation
(d) Chromatography
(a) Fractional distillation
More than one kind of pure form of matter combines forming………:
(a) Texture
(b) Solution
(c) Mixture
(d) Component
(c) Mixture
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
(c) corrosion and it is a chemical change
Air is …………………: mixture:
(a) Heterogeneous
(b) Gas
(c) Solid
(d) Homogenous
(c) Solid
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
(b) Sol is a solid-liquid colloid and gel is liquid solid colloid
Which of the following elements is not a metalloid?
(a) Boron
(b) Silicon
(c) Germanium
(d) Tungsten
(d) Tungsten
