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Everyday Science Important Past Papers Solved Mcqs 3

Everyday Science MCQs Section 3

The answers of questions marked with * are subject to change with time


  • If a ship travels from fresh water to a sea or ocean, it will:

A. Sink a little lower
B. Sink completely
C. Rise a little higher
D. Remains unaffected

PMS (P) GK-15

Buoyancy! The upthrust on a body is equal to the weight of the volume of the liquid displaced by that body.
The density of sea water is more than river water because of the presence of a number of salts dissolved in it. The average salinity of the oceans is 35gms per 1000ml of water. When the ship enters the sea, the water is no more the river fresh water but the saline sea water which is denser. The upthrust increases and the ship rises up.

  • Ice floats because:

A. Density of water is less than ice
B. Density of water is greater than ice
C. Both (a) and (b)
D. Ice cannot float on water

PMS (P) Ministerial Quota GK-19

  • Common Salt/Rock Salt/Table Salt is also called:

A. Amino acid
B. Sodium Chloride (NaCl)
C. Sodium Potassium
D. Potassium Chloride

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  • When table salt NaCl is added to water:

A. A covalent bond is broken
B. An acidic solution is formed
C. Sodium and Chlorine ions are separated
D. Sodium is attracted to the hydrogen atoms of water

Manager Auqaf-20

  • When common salt is mixed with ice, the freezing point is

A. raised
B. lowered (this effect is termed as ‘Freezing Point Depression’)
C. remains unaffected
D. is first lowered and then raised

♦ Credit To: Abdul Wajid ♦

  • When NaHCO3 is heated, it produces:

A. CaCO3
B. CO2
C. Ca(OH)2
D. CaO

PMS (P) GK-19

Sodium hydrogen carbonate or Sodium bicarbonate or Baking Soda, when heated above 80ºC undergoes decomposition reaction forming sodium carbonate, water and carbon dioxide.

  • If there is no sun, the color of the sky would be:

A. Orange
B. Blue
C. Black
D. Yellow

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