Question

TEST YOUR KNOWLEDGE
A Very Short Answer Questions (Answer in a word or a sentence):
1. Name two metals which exist in the free state.
2. Name the most abundant non-metals in :
(i) the universe
(ii) earth's crust
3. Out of copper and zinc which metal evolves hydrogen gas on reacting with dilute hydro-
chloric acid ?
4. Name an alloy of aluminium used in construction of aircrafts.
5. Which non-metal has very high melting and boiling points ?
6. State two conditions necessary for rusting of iron.
It
7. What is the difference between physical state of metals and non-metals at room temperature?
8. Why are electric wires made of copper or aluminium ?
9. Metal X' dipped in a salt solution of Y, displaces 'Y' from the solution. Which is more
reactive X or Y?
10. Name a non-metal which is used in making electrodes in dry cells.
me
1s​

Answer 1

Answer:

1. gold,copper,silver and most metals

2.(ii) The earth'crust

3. zinc

4. alloy of zinc , copper and magnesium.

5. Tungsten

6. Oxygen(O2) and water(H2O)

Answer 2

Answer:

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