1. [B] Car with AC, refrigerator, fire extinguisher, aerosol sprays

    [B] Car with AC, refrigerator, fire extinguisher, aerosol sprays

    See less
    • 1
  2. [D] Gives a squeaky Pop with a lit splint Always Remember, hydrogen gas is recognised by pop sound.

    [D] Gives a squeaky Pop with a lit splint
    Always Remember, hydrogen gas is recognised by pop sound.

    See less
    • 1
  3. [C] 1/f = 1/v – 1/u The correct lens formula is: 1/v – 1/u = 1/f

    [C] 1/f = 1/v – 1/u
    The correct lens formula is:
    1/v – 1/u = 1/f

    See less
    • 1