Isotopes have:

  1. Same atomic mass
  2. Same atomic number
  3. Both of these
  4. None of these

Correct answer: 2. Same atomic number


Boyle’s law states that:

  1. Volume is directly proportional to pressure at constant temperature
  2. Volume is inversely proportional to pressure at constant temperature
  3. Volume is directly proportional to temperature at constant pressure
  4. Volume is inversely proportional to temperature at constant pressure

Correct answer: 2. Volume is inversely proportional to pressure at a constant temperature


Charles law states that:

  1. Volume is directly proportional to pressure at constant temperature
  2. Volume is inversely pr0portional to pressure at constant temperature
  3. Volume is directly proportional to temperature at constant pressure
  4. Volume is inversely proportional to temperature at constant pressure

Correct answer: 3. Volume is directly proportional to the temperature at constant pressure


Solids in which atoms, ions, and molecules are arranged in a definite three dimensional pattern:

  1. Amorphous
  2. Crystalline
  3. Both of these
  4. None of these

Correct answer: 2. Crystalline


Crystals which have all unequal angles and axes having none of the angles 90 are:

  1. Triclinic
  2. Tetragonal
  3. Trigonal
  4. Hexagonal
    Correct answer: 1. Triclinic