Class XI

Domestic power supply in India is
  1. 416 V 60 Hz
  2. 230 V 50 Hz
  3. 24 V DC
  4. 110 V 60 Hz
Water has high surface tension and high capillarity because of
  1. ionic bonds
  2. Hydrogen bonds
  3. dispersion forces
  4. covalent bonds
What will be the minimum pressure required to compress 500 dm3of air at 1 bar to 200 dm3at 30∘C?
  1. 2.5 bar
  2. 3.5 bar
  3. 1.5 bar
  4. 2.0 bar
Three states of matter are the result of ?
  1. Balance between Hydrogen bonding forces and the London forces.
  2. Balance between intermolecular forces and the thermal energy of the molecules
  3. Balance between vanderwaals forces and the London forces.
  4. Balance between intermolecular forces and the intramolecular bonding energy of the molecules
The intermolecular force primarily responsible for the condensed states of nonpolar substances is the
  1. ion-dipole forces
  2. hydrogen bond
  3. dipole-dipole attraction
  4. dispersion force (or London force)
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