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Atom is the smallest part of matter which takes part in chemical reactions.

  • True
  • False

Answer: Option A

Similar Questions :

1. Alexander Graham Bell invented

  • Telephone
  • Telescope
  • Television
  • Tank

Answer: Option A

Explanation:

Alexander Graham Bell of USA invented Telephone in 1876,

Telescope was invented by Hans Lippershey of Netherlands in 1608,

Television was invented by John Logie Bared of Scotland in 1926,

Tank was invented by Sir Ernest Swington of England in 1914.

2. Orbital speed of a satellite is dependent of its mass.

  • True
  • False

Answer: Option B

Explanation:

Orbital speed of a satellite is independent of its mass.

3. What is the range of mercury thermometer ?

  • 0 degree Celsius to 350 degree Celsius
  • -10 degree Celsius to 350 degree Celsius
  • -20 degree Celsius to 350 degree Celsius
  • -30 degree Celsius to 350 degree Celsius

Answer: Option D

4. Force of attraction between the molecules of different substances is called

  • Surface tension
  • Cohensive force
  • Adhesive force
  • None of above

Answer: Option C

Explanation:

Cohensive force - Force of attraction between the molecules of same substance is called Cohensive force.

5. Which instrument is used to measure depth of ocean ?

  • Galvanometer
  • Fluxmeter
  • Endoscope
  • Fathometer

Answer: Option D

Explanation:

Galvanometer - measures electric current,
Fluxmeter - measures magnetic flux,
Endoscope - used to examine internal parts of the body.

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