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50 questions
Name the flask
round bottom flask
flat bottom flask
conical flask
NAME THE APPARATUS
DISTILLATOR
CONDENSOR
FRACTIONATING COLUM
NAME THE SEPARATION TECHNIQUE
FRACTIONAL DISTILLATION
DISTILLATION
SEPARATING FUNNEL
EVAPORATION
NAME THE PROCESS
DISTILLATION
FRACTIONAL DISTILLATION
EVAPORATION
CONDENSATION
NAME THE SEPARATION TECHNIQUE DISTILLATION
EVAPORATION
DISTILLATION
CONDENSATION
NAME THE SEPARATION TECHNIQUE AND NAME THE COMPONENTS IT IS USED TO SEPARATE
Air is regarded as a mixture because:
Its pressure may very
Its pressure may very
Its volume changes under different conditions
Its composition may vary
The process used to separate oil and water is:
Distillation
Sublimation
Separating funnel
chromatography
Two substances A and B when bought together form a substance C with the evolution of heat. The properties of C are entirely different from those of A and B. the substance C is:
A compound
An element
A mixture
None of the above
A sample contains two substances and has uniform properties. The sample is:
A compound
A heterogeneous mixture
An element
A homogeneous mixture
A sample contains two substances and has uniform properties. The sample is:
A compound
A heterogeneous mixture
An element
A homogeneous mixture
White gold is used in jewelry and contains two elements, gold and palladium. A jeweler has two different samples that are both identical in appearance and have a uniform composition throughout. What can be said about the samples?
They are homogeneous mixtures and be classified as metallic alloys.
The materials are heterogeneous mixtures and can be classified by their components
The samples have variable compositions and are classified as metallic solutions.
The samples are heterogeneous mixtures that can be separated using magnetic properties.
.A student is given a mixture of iron filings and sulphur in thee ratio 1 : 2 by weight. He was then asked to heat the mixture over a flame and to observe the olor change. The student will observe that the mixture becomes:
Black
Grey
Yellow
Orange
Distillation is a good separation technique for:
Solids
Liquids
Solid alloys
Gases
If we put camphor in an open container, its amount keeps on decreasing due to the phenomenon of
Evaporation
Precipitation
Condensation
Sublimation
The amount of solute present per unit volume or per unit mass of the solution/solvent is known as
(a) Composition of solute
(b) Concentration of a solvent
(c) Concentration of a solute
(d) Concentration of a solution
(a) (i), (ii) and (iii),
(b) (i), (ii) and (iv)
(c) (ii), (iii) and (iv)
(d) (i), (iii) and (iv)
The quantity of matter present in an object is called
weight
Gram
mass
density
What is the solute in the soda water?
Water
Carbon dioxide
Sugar
Oxygen
how will you seperate oxygen from a mixture of liquid air?
centrifugation
seperating funnel
fractional distillation
distillation
Tyndall effect is observed in forests because of
tress
high oxygen level
mist and dust particles in the air
less sunlight
. This is a type of heterogeneous mixture in which the particles are dispersed and do not settle out.
alloy
solution
suspension
colloid
Particles size of solution
Less than 1 nm
More than 1 nm
Between 1 and 1000 nm
More than 1000 nm
brass is an alloy. It is a mixture of______
30% Zinc 70% copper
20% copper 80% nickel
40% iron 80% copper
35% gold 65% zinc
colloids can be seperated by
filtration
distillation
sedimentation
centrifugation
how will you seperate sulphur and iron fillings
handpicking
sieving
crystallization
magnetic seperation
how will you seperate oxygen from a mixture of liquid air?
centrifugation
seperating funnel
fractional distillation
distillation
how will you seperate the components of sugar solution
evaporation
crystallization
filtration
chromatography
burning of candle is a
physical change
chemical change
both physical and chemical change
none of the above
burning of candle is a
physical change
chemical change
both physical and chemical change
none of the above
Tyndall effect is observed in forests because of
tress
high oxygen level
mist and dust particles in the air
less sunlight
concentration of 36g of NaCl in 100 g of water is
23%
26.47%
29.32%
21.11%
Which of the following are also considered to be states of matter?
Plasma
Platelets
BEC (Bose Einstein Condensate)
BHC
One of the following does not undergo sublimation. This one is
Iodine
Camphor
Sodium chloride
Ammonium chloride
When heat is constantly supplied by a gas burner with small flame to melt the ice, then the temperature of the ice during melting
increases very slowly
does not increase at all
first remains constant then increases
increases to form liquid water
During summer days, water kept in an earthen pot becomes cool because of the phenomenon of
diffusion
transpiration
osmosis
evaporation
On converting 308K, 329K and 391K to Celsius scale, the correct sequence of temperature will be
330C, 560C, 1180C
350C, 560C, 1190C
350C, 560C, 1180C
560C, 1190C, 350C
Which of the following energy is absorbed during change of state of substance?
Specific heat
Latent heat
Heat capacity
Heat of solution
The evaporation of water increases under the following conditions
increase in temperature, decrease in surface area
increase in surface area, decrease in temperature
increase in surface area, increase in temperature
increase in surface area, increase in temperature, addition of common salt
Which of the following is not an element?
Graphite
Germanium
Silica
Silicon
Name three mixtures found in nature
Name a metal which is soft and a non metal which is hard
An element is made up of only one kind of ___________.
The elements which are sonorous are called
metal
non-metal
alloy
None of the above
Chlorine gas is an example of
Compound
Mixture
Element
None of the above
What elements does sugar contain? (More than one option may be true)
Carbon
Sodium
Oxygen
Sulphur
Hydrogen
Which of the following is not an emulsion?
milk
butter
face cream
shaving cream
Which of the following is not a chemical change?
formation of curd
ripening of banana
sublimation of napthalene
corrosion of photo frame
Which of the following mixtures cannot be separated by using water as the solvent?
copper sulphate and sand
sand and potash alum
sand and sulphur
sugar and sand
The dye present in the fountain pen ink can be separated by the technique of:
Fractional distillation
infrared photography
crystallization
chromatography
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