Class X

Ice point is equal to 273 K, which is equal to
  1. −273 °C
  2. 273 °C
  3. 0 °C
  4. 100 °C
Sound waves have
  1. Amplitude only
  2. Frequency and wavelength only
  3. Amplitude, frequency and wavelength
  4. Amplitude and wavelength only
Gravitational field strength of moon is
  1. 1.6 N ⁄ g
  2. 1 ⁄ 6 × Gravitational field strength on earth
  3. Zero
  4. None of above
Freezing point of ethyl alcohol is 156 K, which is equal to
  1. 426 °C
  2. 117 °C
  3. −426 °C
  4. −117 °C
A 250 cm³ flask of glass filled with seawater weighs 350 g. density of seawater if empty flask weighs 100 g would be
  1. 5 ⁄ 7 g ⁄ cm³
  2. 7 ⁄ 5 g ⁄ cm³
  3. 2 ⁄ 5 g ⁄ cm³
  4. 1 g ⁄ cm³
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