Question Detail

Which gas is filled in refrigerators ?

  • Chlorofluorocarbon
  • Acetylene
  • Methane
  • Butane
Similar Questions :

1. Mass number of a nucleus is :

  • the sum of the number of protons and neutrons present in the nucleus
  • always more than the atomic weight
  • always less than its atomic number
  • None of above

2. Alloys made with mercury as one metal are called ?

  • mixtures
  • emulsions
  • solders
  • amalgams

3. Natural rubber is a polymer derived from ?

  • ethylene
  • propylene
  • isoprene
  • butadiene

4. What nucleus of atom contains ?

  • protons
  • electrons
  • electrons and protons
  • protons and neutrons

5. The ejection of electrons when a metal surface is irradiated is known as

  • Black body radiation
  • Photoelectric effect
  • Zeeman effect
  • Atomic spectrum
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