Class X

Which of the following metals forms an amalgam with other metals?
  1. Tin
  2. Mercury
  3. Lead
  4. Zinc
Which of the following is used in pencils?
  1. Graphite
  2. Silicon
  3. Charcoal
  4. Phosphorous
The gas usually filled in the electric bulb is
  1. oxygen
  2. hydrogen
  3. carbon dioxide
  4. nitrogen
Bromine is a
  1. red liquid
  2. black solid
  3. colourless gas
  4. highly inflammable gas
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