SAT - Science - Chemistry - Is Matter Around us Pure

Question - 1

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

Question - 2

Cut an apple and keep the slices exposed to air for sometime. Identify the true statement about the process.

  • A The colour of the cut surface becomes brown.
  • B The colour of the cut surface changes due to chemical change.
  • C The colour change is irreversible
  • D All the above

Question - 3

Match the following:

List-I List-II
a. CO2 1. mixture
b. Graphite 2. Retains the properties of
the constituents
c. Air 3. contains only one type of atoms
d. Soil 4. heterogeneous
  • A a b c d 2 4 1 3
  • B a b c d 2 3 1 4
  • C a b c d 4 3 1 2
  • D a b c d 2 1 3 4

Question - 4

No new substances are formed in which of the following reactions?

  • A Combustion
  • B neutralisation
  • C Crystallisation
  • D digestion

Question - 5

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

Question - 6

Identify the pure substance among the following.

  • A Molten sodium chloride
  • B Sugar solution
  • C Aqueous sodium chloride
  • D 10% H2S04

Question - 7

x g of an aqueous solution of a salt A contains y g of A. The solubility of A is

  • A \(\frac{y}{x}\times100\)%
  • B \(\frac{y}{x-y}\times100\)%
  • C \(\frac{x}{y-x}\times100\)%
  • D \(\frac{x}{y}\times100\)%

Question - 8

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

Question - 9

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

Question - 10

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
Facebook
Twitter
Google+
Email