Class X

Food cans are coated with tin and not with zinc because
  1. zinc is costlier than tin.
  2. zinc has a higher melting point than tin.
  3. zinc is more reactive than tin
  4. ) zinc is less reactive than tin.
atom is In general the number of electrons in the outermost shell of a metal
  1. 1
  2. 1 to 3
  3. 5 to 8
  4. 8
What are the constituents of alloy solder?
  1. Copper, zinc
  2. Copper, tin
  3. Lead, Zinc
  4. Lead, tin
Which of the following non-metal is good conductor of electricity?
  1. Graphite
  2. Phosphorus
  3. Hydrogen
  4. Bromine
Which of the following is NOT True for metals?
  1. Generally metals are malleable.
  2. Generally metals are malleable.
  3. Metals are good conductors of heat.
  4. Metals are electronegative by nature
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