Water Worksheet-1

Water Worksheet-1

 

Multiple-Choice Question:

  1. _______ % of all living matter contains water.

(A) 70-90             (B) 20-40             (C) 90-95             (D) 50-70

 

  1. Water has _____ specific heat capacity.

(A) Low                (B) Very low        (C) Very high       (D) None of these

 

  1. The ratio of hydrogen & oxygen in the water is:

(A) 1 : 2                (B) 2 : 1                 (C) 1 : 1                 (D) None of these

 

  1. Any sample of natural water which contains more than _____of dissolved salts is called saline water.

(A) 0.5  -1 %        (B) 1 – 1.5 %        (C) 2-3 %              (D) Less than 0.5 %

 

  1. Distilled water is not fit for drinking because:

(A) Dissolved salt concentration is very high

(B) It lacks sodium chloride which is used for body metabolism

(C) It lacks mineral salts

(D) It contains dissolved air and is germ free

 

  1. Distilled water is not fit for drinking because:

(A) It dissolves essential salts present in our body

(B) It has bad taste

(C) It is not good for digestion

(D) None of these

 

  1. At what temperature water has maximum density?

(A) 0°C                 (B) 2°C                 (C) 5°C                 (D) 4°C

 

  1. The density of ice is ______ than/as water.

(A) More                                           (B) Less

(C) Same                                           (D) None of these

 

  1. The heat energy utilised in changing ice to water is stored within the water formed and is called:

(A) Latent heat of fusion of ice      (B) Specific heat capacity of ice

(C) Molar heat capacity of ice        (D) None of these

 

  1. The volume of water above 4°C:

(A) Increases                                     (B) Decreases

(C) Remains same                            (D) None of these

 

Answer Key:

  1. (A)
  2. (C)
  3. (B)
  4. (C)
  5. (C)
  6. (A)
  7. (D)
  8. (B)
  9. (A)
  10. (A)