CBSE
Multiple Choice QuestionsIf 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
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
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.
The force of gravitation is
repulsive
conservative
electrostatic
non-conservative
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
