Lakshya Education MCQs

Question: Which of the following liquids has the least density ?
Options:
A.Fresh water
B.Salt water
C.Petrol
D.Mercury
Answer: Option C

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More Questions on This Topic :

Question 1. A small drop of oil spreads over water because :
  1.    Oil has a higher surface tension
  2.    Water has a higher surface tension
  3.    Oil has a higher viscosity
  4.    Water has a higher viscosity
Answer: Option B
Question 2. Two rods, one of copper and other of steel, experience the same upthrust when placed in water.Thus, both have
  1.    Equal volume
  2.    Equal weight
  3.    Equal density
  4.    Equal mass
Answer: Option A
Question 3. On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because
  1.    Mercury is a metal
  2.    Density of mercury is greater than that of water
  3.    Cohesion of mercury is greater than its adhesion with glass
  4.    Cohesion of water is greater than its adhesion with glass
Answer: Option C
Question 4. Water from soil enters into the root hairs owing to :
  1.    Atmospheric pressure
  2.    Capillary pressure
  3.    Root pressure
  4.    Osmotic pressure
Answer: Option B
Question 5. The absorption of ink by blotting paper involves
  1.    Viscosity of ink
  2.    Diffusion of ink through the blotting
  3.    Capillary action phenomenon
  4.    Siphon action
Answer: Option C
Question 6. Which of these liquids has the highest viscosity?
  1.    Milk
  2.    Syrup
  3.    Pineapple juice
  4.    Water
Answer: Option B

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