Chemistry Questions Answers

• 15. Due to rusting the weight of iron

  1. Decreases
  2. Increases
  3. Remains the same
  4. Uncertain

  Answer :

  Option B

• 16. What among following is used to produce artificial rain ?

  1. copper oxide
  2. carbon monoxide
  3. silver iodide
  4. silver nitrate

  Answer :

  Option C

• 17. Water drops are spherical because of ?

  1. viscosity
  2. density
  3. polarity
  4. surface tension

  Answer :

  Option D

• 18. The ore which is found in abundance in India is

  1. monazite
  2. bauxite
  3. magnetite
  4. fluorspar

  Answer :

  Option A

• 19. Which of the following gas is used in cigarette lighters ?

  1. Butane
  2. Propane
  3. Methane
  4. Ethane

  Answer :

  Option A

• 20. The metallurgical process in which a metal is obtained in a fused state is called ?

  1. roasting
  2. calcinations
  3. smelting
  4. froth floatation

  Answer :

  Option C

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

  1. metalloids
  2. allotropes
  3. alloys
  4. colloids

  Answer :

  Option A