Assertion:  Unlike electric force and gravitational for

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and hs high melting point?

  • metallic bonding

  • van der Waal's bonding

  • Ionic bonding

  • Ionic bonding

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2.

If the lattice parameter for a crystalline structure is 3.6 A, then atomic radius in fcc crystal is

  • 1.18 A

  • 2.10 A

  • 2.92 A

  • 2.92 A

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3.

Assertion:  Unlike electric force and gravitational forces, nuclear force has limited range.

Reason:  Nuclear force do not obey inverse square law.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


B.

If both assertion and reason are true but reason is not the correct explanation of assertion.

Gravitational force:- Weakest force, but infinite range ( not part of standard model)

Weak Nuclear Force:- Next weakest, but short range

Electromagnetic Force:- Stronger, with infinite range

Strong Nuclear force:- strongest, but short range


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4.

Assertion:  The Coulomb force is dominating force in the universe. 

Reason: The Coulomb force is weaker than the gravitational force.

  • if both assertion and reason are true and the reason is the correct explanation of the assertion

  • if both assertion and reason are true and the reason is not the correct explanation of the assertion

  • if assertion is true but reason is false

  • if both assertion and reason are false statements


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5.

The force of gravitation is

  • repulsive

  • conservative

  • electrostatic

  • non-conservative


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