Is Matter Around Us Pure MCQs with answers

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Akash Lawaniya • 9.58K Points
Tutor III 

Q. Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compound or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel

(A) (i) and (ii)
(B) (i) and (iii)
(C) (iii) and (iv)
(D) (ii) and (iii)
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Correct Answer - Option (B)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. 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
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Correct Answer - Option (C)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. Tincture of iodine has antiseptic properties. This solution is made by dissolving

(A) iodine in potassium iodide
(B) iodine in vaseline
(C) iodine in water
(D) iodine in alcohol
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Correct Answer - Option (D)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. Blood and sea water are

(A) both mixtures
(B) both are compounds
(C) blood is a mixture whereas sea water is a compound
(D) blood is a compound and sea water is a mixture
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Correct Answer - Option (A)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. 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
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Correct Answer - Option (B)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. In a water-sugar solution

(A) water is solute and sugar is solvent
(B) water is solvent and sugar is solute
(C) water is solute and water is also solvent
(D) none of these
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Correct Answer - Option (B)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. Boron and carbon are

(A) metalloids
(B) metalloid and non-metal respectively
(C) metal
(D) non-metal and metalloid respectively
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Correct Answer - Option (B)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. Which of the following are physical changes?
(i) Melting of iron metal
(ii) Rusting of iron
(iii) Bending of an iron rod
(iv) Drawing a wire of iron metal

(A) (i), (ii) and (iii)
(B) (i), (ii) and (iv)
(C) (i), (iii) and (iv)
(D) (ii), (iii) and (iv)
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Correct Answer - Option (C)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. Which of the following are chemical changes?
(i) Decaying of wood
(ii) Burning of wood
(iii) Sawing of wood
(iv) Hammering of a nail into a piece of wood

(A) (i) and (ii)
(B) (ii) and (iii)
(C) (iii) and (iv)
(D) (i) and (iv)
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Correct Answer - Option (A)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. Two substances, A and B were made to react to reaction a third substance, A2B according to the following
2 A + B → A2B
Which of the following statements concerning this reaction are incorrect?
(i) The product A2B shows the properties of substances A and B
(ii) The product will always have a fixed composition
(iii) The product so formed cannot be classified as a compound
(iv) The product so formed is an element

(A) (i), (ii) and (iii)
(B) (ii), (iii) and (iv)
(C) (i), (iii) and (iv)
(D) (ii), (iii) and (iv)
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Correct Answer - Option (C)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. Two chemical species X and Y combine together to form a product P which contains both X and Y
X + Y → P
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species X, Y and P are correct?
(i) P is a compound
(ii) X and Y are compounds
(iii) X and Y are elements
(iv) P has a fixed composition

(A) (i), (ii) and (iii)
(B) (i), (ii) and (iv)
(C) (ii), (iii) and (iv)
(D) (i), (iii) and (iv)
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Correct Answer - Option (D)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. Which of the following methods would you use to separate cream from milk?

(A) Fractional distillation
(B) Distillation
(C) Centrifugation
(D) Filtration
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Correct Answer - Option (C)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. Cooking of food and digestion of food:

(A) are both physical processes
(B) are both chemical processes
(C) cooking is physical whereas digestion is chemical
(D) cooking is chemical whereas digestion is physical
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Correct Answer - Option (B)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. 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)
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Correct Answer - Option (A)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. Fill in the blank

A colloid is a ………….. mixture and its components can be separated by the technique known as ……………

(A) heterogeneous, centrifugation
(B) homogeneous, centrifugation
(C) any of them
(D) none
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Correct Answer - Option (A)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. Fill in the blank

Ice, water and water vapour look different and display different …………. properties but they are ………… the same.

(A) physical, chemically
(B) physical, biologically
(C) physically, almost
(D) none
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Correct Answer - Option (A)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. Fill in the blank

A mixture of chloroform and water taken in a separating funnel is mixed and left undisturbed for sometime. The upper layer in the separating funnel will be of ………….. and the lower layer will be that of …………..

(A) water, chloroform
(B) chloroform, water
(C) soil, chloroform
(D) none
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Correct Answer - Option (A)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. Fill in the blank

A mixture of two or more miscible liquids, for which the difference in the boiling points is less than 25 K can be separated by the process called ………….

(A) fractional distillation
(B) distillation
(C) none
(D) ----
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Correct Answer - Option (A)

A

Akash Lawaniya • 9.58K Points
Tutor III 

Q. When light is passed through water containing a few drops of milk, it shows a bluish tinge. This is due to the …………… of light by milk and the phenomenon is called ………….. This indicates that milk is a …………… solution.

(A) scattering, Tyndall effect, colloidal.
(B) ---
(C) ---
(D) ---
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Correct Answer - Option (A)

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Table of contents

  1. Which of the following statements are true for pure substances? (i) Pure substances contain only on
  2. Rusting of an article made up of iron is called
  3. Tincture of iodine has antiseptic properties. This solution is made by dissolving
  4. Blood and sea water are
  5. Sol and gel are examples of
  6. In a water-sugar solution
  7. Boron and carbon are
  8. Which of the following are physical changes? (i) Melting of iron metal (ii) Rusting of iron (iii)
  9. Which of the following are chemical changes? (i) Decaying of wood (ii) Burning of wood (iii) Sawi
  10. Two substances, A and B were made to react to reaction a third substance, A2B according to the follo
  11. Two chemical species X and Y combine together to form a product P which contains both X and Y X + Y
  12. Which of the following methods would you use to separate cream from milk?
  13. Cooking of food and digestion of food:
  14. Mercury and bromine are both
  15. Fill in the blank A colloid is a ………….. mixture and its components can be separated by th
  16. Fill in the blank Ice, water and water vapour look different and display different ………….
  17. Fill in the blank A mixture of chloroform and water taken in a separating funnel is mixed and lef
  18. Fill in the blank A mixture of two or more miscible liquids, for which the difference in the boil
  19. When light is passed through water containing a few drops of milk, it shows a bluish tinge. This is

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