

SAT Chemistry - Is Matter Around us Pure
Exam Duration: 45 Mins Total Questions : 30
Which of the following processes is considered as only physical change?
- (a)
Combustion of petrol in automobile engine
- (b)
Photosynthesis
- (c)
Condensation of water vapour
- (d)
Tarnishing of silver
A mixture consists of three compounds A, B and C. A and C are soluble in water and C is sublimable. The correct sequence by which the following techniques can
be used for their separation is
i) Dissolution in water
ii) Sublimation
iii) Crystallisation
iv) Filtration
- (a)
iv. i, ii, iii
- (b)
i, ii, iii, iv
- (c)
ii, i, iv, iii
- (d)
i, ii, iv and iii
Identify the pure substance among the following.
- (a)
Molten sodium chloride
- (b)
Sugar solution
- (c)
Aqueous sodium chloride
- (d)
10% H2S04
Which of the following is not a homogeneous mixture?
- (a)
Bronze
- (b)
A mixture of O2 and He
- (c)
Milk
- (d)
A mixture of kerosene and petrol
S-8; Xe - 1 ; Cl2 - 2 ; O3 - 3
Arrange the following elements in the increasing order
of the number of atoms per molecule.
i) Sulphur
ii) Xenon
iii)Chlorine
iv) Ozone
- (a)
ii < iii < iv < i
- (b)
ii < iv < iii <i
- (c)
i < ii < iii < iv
- (d)
i < iii < ii < iv
Arrange the following in the order of element, homogeneo.usmixture, compound and heterogeneous mixture.
m) Charcoaland water
n) Copper
0) Quicklime
p) Vinegar
- (a)
mnop
- (b)
npmo
- (c)
npom
- (d)
pomn
element - copper (n) ; homogeneous mixture-vinegar (p)
compound - CaO heterogeneous mixture -charcoal and water (m)
A mixture contains saw dust, sodium chloride and naphthalene.Which of the following methods can be used for the separation of the components?
m) Dissolutionin water
n) Separating funnel
o) Sublimation
p) Evaporation
q) filtration
- (a)
o, m, q, n
- (b)
o, m, q, p
- (c)
m, n, q, p
- (d)
rn, q, o, p
Sublimation ➝ dissolution in water ➝ filteration ➝ evaporation
Sodawater is a saturated solution of CO2 in water. If the temperature of the solution is increased it becomes unsaturated. Identify the true statement about
the given data.
- (a)
solubility of CO2 decreases with temperature
- (b)
Solubility of CO2 increases with temperature
- (c)
Solubility of CO2 is independent of temperature
- (d)
The solubility of gas in liquid depends only on pressure.
The solubility of a gas in liquid increases with pressure and decreases with temperature.
Which of the following solutions will show Tyndall effect?
i) River water
ii) Starch solution
iii) Muddy water
iv) distilled water
- (a)
i and ii
- (b)
ii and iii
- (c)
iv only
- (d)
i,ii and iii
The monoatomic gas among the following is
- (a)
Hydrogen
- (b)
Helium
- (c)
Oxygen
- (d)
Nitrogen
Identify the compounds among the following.
I) Marble
II) Silicon
III) Silica
IV) Water
- (a)
I and II
- (b)
I and III
- (c)
IV only
- (d)
I, III and IV
Tyndall effect is shown by
- (a)
Sugar solution
- (b)
Salt solution
- (c)
Soap solution
- (d)
Muddy water
Mark the correct statement
- (a)
Burning of paper does not produce any newsustance.
- (b)
Respiration is a chemical change.
- (c)
The fizz that comes out when a soda bottle is opened is due to a chemical change
- (d)
Crystallisation is a chemical change
What happens when LPG bums?
- (a)
New substances are formed
- (b)
Energy is released
- (c)
Reversible change takes place
- (d)
Both A and B
Which of the following mixture is not homogeneous?
- (a)
Aerated drinks
- (b)
Sulphur in carbon tetrachloride
- (c)
Sulphur in water
- (d)
Water and ethanol
A mixture of ammonium chloride and sodium chloride can be separated by
- (a)
magnetic separation
- (b)
Sublimation
- (c)
solvent extraction
- (d)
filtration
Which of the following is a compound?
- (a)
Air
- (b)
Milk
- (c)
Iodine
- (d)
Water
The particle size of solute in true solution is of the order of
- (a)
10-6m
- (b)
10-7m
- (c)
10-8m
- (d)
10-9m
The concentration of solution is the mass of the solute in grams, which is present in
- (a)
10 gm of solvent
- (b)
10 gm of solution
- (c)
100gmofsolvent
- (d)
100 gm of solution
A solution, which at a given temperature dissolves as much solute as it is capable of dissolving, is said to be a
- (a)
saturated solution
- (b)
semi saturated solution
- (c)
unsaturated solution
- (d)
super saturated solution
Which of the following is not a compound?
- (a)
Marble
- (b)
Washing soda
- (c)
Quick lime
- (d)
Brass
Air is regarded as a
- (a)
compound
- (b)
mixture
- (c)
element
- (d)
electrolyte
Which of the following statement is not true about suspension?
- (a)
The particles of suspension can be separated from solvent by the process of filtration.
- (b)
When the suspension is kept undisturbed the particles of suspension settle down.
- (c)
A suspension is homogeneous in nature.
- (d)
Scattering of light take place in suspension
Soap solution is an example of -
- (a)
suspension
- (b)
true solution
- (c)
colloidal solution
- (d)
none of these
Which of the following is an example of gel?
- (a)
Coloured gem
- (b)
jelly
- (c)
Smoke
- (d)
Shaving cream
Which of the following will show Tyndall effect
- (a)
Starch solution
- (b)
Sodium chloride solution
- (c)
Copper sulphate solution
- (d)
Sugar solution
Which of the following substances when mixed with sand cannot be separated by sublimation?
- (a)
NaCI
- (b)
NH4Cl
- (c)
Camphor
- (d)
Iodine
Mixture of sand and camphor can be purified by
- (a)
distillation
- (b)
filtration
- (c)
sedimentation
- (d)
sublimation
A mixture of ammonium chloride and sodium chloride can be separated by
- (a)
chromatography
- (b)
hand picking
- (c)
by sublimation
- (d)
centrifugation
Which of the following is not a chemical change?
- (a)
Rusting of iron
- (b)
Cooking of food
- (c)
Freezing of water
- (d)
Digestion of food