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All noble gases are ?

  • colourless
  • colourless
  • colourless and odourless
  • colourless and but have odour

Answer: Option C

Similar Questions :

1. What is extracted from Bauxite ?

  • Mica
  • Aluminium
  • Copper
  • Tin

Answer: Option B

2. Atomic number of an element gives

  • the number of nucleons in its atom
  • the number of electrons in its atom
  • the weight of the atom of the element
  • the total number of elementary particles in its atom

Answer: Option B

3. Elements that show the properties of both metals and non metals are called ?

  • metalloids
  • allotropes
  • alloys
  • colloids

Answer: Option A

4. The material which can be deformed permanently by heat and pressure is called a

  • thermoset
  • thermoplastic
  • chemical compound
  • polymer

Answer: Option A

5. Why is phosphorus kept under water ?

  • to make it wet
  • to make it durable
  • water forms a protective coating on it
  • to save it from catching fire when exposed to dry air

Answer: Option D

Read more from - Chemistry Questions Answers
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