Available Answers

1. 1.

   Choose the correct option to fill in the blanks.

   1. Non-metals are __________ (not lustrous/lustrous) but iodine is a non-metal which is ___________ (not lustrous/lustrous).
   2. __________ (Zinc/Copper) is neither a malleable nor a ductile metal.
   3. ____________ (Metals/Non-metals) have 4,5,6 or 7 electrons in their valence as shell.
   4. Metals form ___________ (cation/anion) by ___________ (losing/gaining) electron(s), whereas non-metals form ___________ (cation/anion) by ___________ (losing/gaining) electron(s).
2. 2.

   Write T for true and F for false.

   1. In rusting, the iron is converted into hydrated  ferrous oxide.
   2. Galvanization is a process of protecting iron from rusting, by coating it with thin layer of zinc.
   3. In tin-plating, tin sheets are coated with thin copper.
   4. Stainless steel is an alloy of iron with chromium, nickel and carbon.
   5. Copper does not corrode.
3. 3.

   Choose the correct option to fill in the blanks.

   1. ___________ (Diamond/Graphite) is a shining crystalline solid used for cutting, drilling and grinding purposes.
   2. Swimming pool water is disinfected to make it germ-free with ___________ (chlorine/bromine).
   3. __________ (Sulphur/Mercury) is a yellow crystalline solid used as a fungicide and an insecticide.
   4. Potassium, magnesium, chromium and copper salts are used in ____________ (fireworks/dentistry).
   5. ___________ (Aluminium/Copper) is used in making frames, partitions, doors and windows.
4. 4.

   Name a non-metal which is used in electrical bulbs.

5. 5.

   Which non-metal is used for spraying over the crop to prevent diseases caused by fungi and insects?

6. 6.

   Name the most ductile metal.