1. (a) focal length of concave mirror and concave lens is negative.

    (a) focal length of concave mirror and concave lens is negative.

    See less
    • 1
  2. Properties of elements are a periodic function of their atomic number.

    Properties of elements are a periodic function of their atomic number.

    See less
    • 1
  3. Compounds that are obtained by the transference of electrons from one atom to the other are called ionic compounds.

    Compounds that are obtained by the transference of electrons from one atom to the other are called ionic compounds.

    See less
    • 1
  4. (d) Withdrawal of hand after coming in contact with hot object.

    (d) Withdrawal of hand after coming in contact with hot object.

    See less
    • 0