Science General knowledge Questions

25. Water is a good solvent of ionic salts because
  A.  It has a high boiling point
  B.  It has no colour
  C.  It has a high specific heat
  D.  It has a high dipole moment
Ans: D
It has a high dipole moment
26. A substance which changes readily into vapour without heating is called
  A.  Synthetic
  B.  Volatile
  C.  Efflorescent
  D.  Effervescent
Ans: B
27. In an electronic watch, the component corresponding to pendulum of a pendulum clock is a
  A.  Diode
  B.  Transistor
  C.  Crystal oscillator
  D.  Balance wheel
Ans: C
Crystal oscillator
28. The temperature, at which the same value on both the centigrade and the Fahrenheit scale exists, is
  A.  40°
  B.  -40 °
  C.  32 °
  D.  –32 °
Ans: B
- 40 °
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