All questions of Is Matter Around Us Pure? for Class 9 Exam

• a)
  Bromine
• b)
  Mercury
• c)
  Gallium
• d)
  Calcium

• a)
  Mercury
• b)
  Distilled water
• c)
  Nitric acid
• d)
  Tap water

• A:
  Mixture
• B:
  Elements
• C:
  Compound
• D:
  both a and b

• A:

  Freezing of water

• B:

  Cooking of vegetables.

• C:

  Drying of wet clothes in sun light

• D:

  Melting of ice

The answer is b.

• a)
  20%
• b)
  100%
• c)
  10%
• d)
  5%

• a)
  Statement B
• b)
  Statement A
• c)
  Both the Statement A and B
• d)
  Neither Statement A nor Statement B.

• a)
  A mixture can be separated into its constituents.
• b)
  Energy is not given out in the preparation of a mixture.
• c)
  A mixture has a fixed melting point.
• d)
  The composition of a mixture is variable

• a)
  Instrument used for measuring micro-distance         
• b)
  Instrument used for measuring macro-distance         
• c)
  Unit for measuring micro-distance         
• d)
  Unit for measuring macro-distance.

• a)
  1-D, 2-A, 3-C, 4-B
• b)
  1-A, 2-C, 3-B, 4-D
• c)
  1-B, 2-D, 3-A, 4-C
• d)
  1-C, 2-B, 3-D, 4-A

• a)
  impure; two or more simpler substances
• b)
  soft; only one kind of atoms
• c)
  hard; only one element
• d)
  pure; two or more elements

• a)
  N₂
• b)
  O₂
• c)
  Both (a) and (b)
• d)
  None of these.

• a)
  Air
• b)
  Brass
• c)
  Water
• d)
  Milk

• a)
    Temperature of substance
• b)
    Heat of substance         
• c)
    Radiation of substance
• d)
    Flow energy in a substance.

• a)
  (b) and (c) are correct
• b)
  (a) and (b) are correct
• c)
  (a), (b) and (c) are correct
• d)
  All of these

Match the following with correct response. 

• a)
  1-A, 2-C, 3-B, 4-D
• b)
  1-C, 2-B, 3-D, 4-A
• c)
  1-D, 2-A, 3-C, 4-B
• d)
  1-B, 2-D, 3-A, 4-C

• a)
  By Centrifugation
• b)
  By sublimation
• c)
  By fractional distillation
• d)
  By separating funnel.

• a)
  Colloidal solution
• b)
  Suspension
• c)
  True solution
• d)
  Emulsion

• a)
   Both the Statement A and B
• b)
  Statement A
• c)
  Statement B
• d)
  Neither A or B

• a)
  Fusion
• b)
  Condensation
• c)
  Solidification
• d)
  Sublimation

• a)
  Milk
• b)
  Salt solution
   
• c)
  Air
• d)
  Distilled water

• a)
  Sodium
• b)
  Cesium
• c)
  Magnesium
• d)
  Lithium

• a)
  (i) and (ii)
• b)
  (i) and (iv)
• c)
  (ii) and (iii)
• d)
  (iii) and (iv)

• a)
  CO₂ and NO₂
• b)
  CO₂ and N₂O₂
• c)
  CO₂ and H₂
• d)
  CO₂ and N₂O

• a)
  Both (A) and (R) are true, and (R) is the correct explanation of (A).
• b)
  Both (A) and (R) are true, but (R) is not the correct explanation of (A).
• c)
  (A) is true, but (R) is false.
• d)
  (A) is false, but (R) is true.

• a)
  Burning magnesium in air
• b)
  Mixing NH₃ and HCl
• c)
  Mixing BaSO₄+ NaCl
• d)
  Adding NaCl to water

• a)
  Non metal
• b)
  Metal
• c)
  Compound
• d)
  All of these

Match the following with correct response. 

• a)
  1-C, 2-B, 3-D, 4-A
• b)
  1-A, 2-C, 3-B, 4-D
• c)
  1-D, 2-A, 3-C, 4-B
• d)
  1-B, 2-D, 3-A, 4-C

• a)
  No energy changes occur when the constituent of air tried to be mixed.
• b)
  Purity of compounds can be tested by determining their melting points.
• c)
  Cesium and gallium are liquids above 30⁰C.
• d)
  Mixture can be called as a single substance

• a)
  Absorbed
• b)
  Released
• c)
  First absorbed and then released
• d)
  Neither absorbed nor released.

• a)
  Chalk powder and water mixture
• b)
  Potash alum and water mixture
• c)
  Sugar and water mixture
• d)
  Potassium permanganate and water mixture

• a)
  A suspension
• b)
  A colloid
• c)
  A true solution
• d)
  A homogeneous mixture

• a)
  10%
• b)
  11%
• c)
  13.8%
• d)
  1.38%

• a)
  11%
• b)
  20%
• c)
  55%
• d)
  22%

• a)
  Both (A) and (R) are true, and (R) is the correct explanation of (A).
• b)
  Both (A) and (R) are true, but (R) is not the correct explanation of (A).
• c)
  (A) is true, but (R) is false.
• d)
  (A) is false, but (R) is true.

• a)
  Chromium
• b)
  Gallium
• c)
  Germanium
• d)
  Potassium

• a)
  They are homogeneous.
• b)
  They are the simplest substances and cannot be broken down further.
• c)
  They are formed by a chemical combination of two or more substances.
• d)
  They can exist in different physical states (solid, liquid, gas).

• a)
  Dust storm
• b)
  A suspension of chalk in water
• c)
  A dilute solution of alcohol in water.
• d)
  Soap bubbles are formed by blowing air into soap solution

• a)
  Both (A) and (R) are true, and (R) is the correct explanation of (A).
• b)
  Both (A) and (R) are true, but (R) is not the correct explanation of (A).
   
• c)
  (A) is true, but (R) is false.
• d)
  (A) is false, but (R) is true.

• a)
  Both (A) and (R) are true, and (R) is the correct explanation of (A).
• b)
  Both (A) and (R) are true, but (R) is not the correct explanation of (A).
• c)
  (A) is true, but (R) is false.
• d)
  (A) is false, but (R) is true.

• a)
  Both (A) and (R) are true, and (R) is the correct explanation of (A).
• b)
  Both (A) and (R) are true, but (R) is not the correct explanation of (A).
• c)
  (A) is true, but (R) is false.
• d)
  (A) is false, but (R) is true.

• a)
  Metals
• b)
  Non-metals
• c)
  Alloys
• d)
  Semi-metals

• a)
  Ruby
• b)
  Shaving cream
• c)
  Bread
• d)
  Butter

• a)
  8.2%
• b)
  6.25%
• c)
  7.5%

• a)
  (i) and (ii)
• b)
  (ii) and (iii)
• c)
  (i) and (iv)
• d)
  (ii) and (iv)

• a)
  Boron
• b)
  Brass
• c)
  Bread
• d)
  Beryllium

• a)
  Both (A) and (R) are true, and (R) is the correct explanation of (A).
• b)
  Both (A) and (R) are true, but (R) is not the correct explanation of (A).
• c)
  (A) is true, but (R) is false.
• d)
  (A) is false, but (R) is true.

• a)
  Elements
• b)
  Energy
• c)
  Matter
• d)
  Air

• a)
  Salt in water
• b)
  Muddy water
• c)
  Milk
• d)
  Sand in water

• a)
  Both (A) and (R) are true, and (R) is the correct explanation of (A).
• b)
  Both (A) and (R) are true, but (R) is not the correct explanation of (A).
• c)
  (A) is true, but (R) is false.
• d)
  (A) is false, but (R) is true.

• a)
  (i) and (ii)
• b)
  (ii) and (iii)
• c)
  (i) and (iii)
• d)
  (ii) and (iv)