Class XI

oil raise up the wick in a lamp. The principle involves
  1. the diffusion of oil through the wick
  2. the liquid state of oil
  3. . capillary action phenomenon
  4. volatility of oil
Of the following properties of a wave, the one that is independent of the other is its
  1. amplitude
  2. . velocity
  3. wavelength
  4. frequency
Plant bends towards the source of light on account of the movement of curvature known as
  1. geotropism
  2. thigmotropism
  3. chemotropism
  4. phototropism
Superconductors are substances which
  1. conduct electricity at low temperature
  2. offer high resistance to the flow of current
  3. offer no resistance to the flow of electricity
  4. . conduct electricity at high temperatures
The items amenable to detection by soft x-rays are
  1. contrabands
  2. lead in bullets
  3. narcotics
  4. genuine coins from counterfeit coins
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