When a grey coloured metal (P) object is
left exposed to damp air for a considerable
time, it gets a reddish-brown flaky coating
by the process called (Q) which eats up the
whole object gradually. It is said that the
presence of (R) and (S) are necessary for
this process to take place. If this object is
galvanised by metal (T), then the process
(Q) does not occur.
Now select the incorrect statement(s) from
the following.
I. The metal P of which the object is
made is iron.
II. The process Q is known as rusting
which is a chemical change.
III. R and S are carbon dioxide and water.
IV. The metal T is copper.
A I and II only
B III and IV only
D IV only
D I and III only
Wrong answer in Report