Question

1. When a grey coloured object made of metal A is left exposed to damp air for a
considerable time, it gets covered with red - brown flaky coating by the process called B
which eats up the whole object gradually. It is said that the presence of C and D is
necessary for this process to take place. If this object is galvanized by metal E, then the
process B does not occur.
1x5=5
i) Name the metal A of which the object is made.
ii) Name the process B.
iii) What are (a) C, and (b) D?
iv) Name the metal E.
v) Name the other two processes by which we can prevent process B.
2 Fill in the blanka​

Answer 1

Answer:

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Answer 2

Answer:

(i) Metal A is iron

2. process b is is rusting

3. C and D are moisture and oxygen.

4. zinc is metal E that is used in galvanisation which prevents rusting.

5. we can paint or alloy iron to prevent rusting

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