Fill in the following blanks with suitable words:
(a) The corrosion of iron is called ................
(b) ............ and .............. are necessary for the rusting of iron.
(c) The process of depositing a thin layer of zinc on iron articles is called .............
(d) Tiffin boxes are electroplated with .............. but car bumpers are electroplated with ............... to protect them from rusting.
(e) The corrosion of copper produces a .............. coating of basic copper carbonate on its surface.
(f) Brass is an alloy of copper and .........
(g) Bronze is an alloy of copper and .........
(h) The non-metal present in steel is ............
(i) The alloy in which one of the metals is mercury is called an ...............
(j) The electrical conductivity and melting point of an alloy is ........... than that of pure metals.
(k) The rocky material found with ores is called.............

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Solution

(a) The corrosion of iron is called rusting.

(b) Air (oxygen) and water are necessary for the rusting of iron.

(c) The process of depositing a thin layer of zinc on iron articles is called galvanization.

(d) Tiffin boxes are electroplated with tin but car bumpers are electroplated with chromium to protect them from rusting.

(e) The corrosion of copper produces a green coating of basic copper carbonate on its surface.

(f) Brass is an alloy of copper and zinc .

(g) Bronze is an alloy of copper and tin.

(h) The non-metal present in steel is carbon.

(i) The alloy in which one of the metals is mercury is called an amalgam

(j) The electrical conductivity and melting point of an alloy is less than that of pure metals.

(k) The rocky material found with ores is called gangue.

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Similar questions

Fill in the following blanks with suitable words:
(a) The corrosion of iron is called....
(b) .....and .... are necessary for the rusting of iron.
(c) The process of depositing a thin layer of zinc on iron articles is called...
(d) Tiffin boxes are electroplated with .... but car bumpers are electroplated with .... to protect them from rusting.
(e) The corrosion of copper produces a .... coating of basic copper carbonate on its surface.
(f) Brass is an alloy of copper and....
(g) Bronze is an alloy of copper and....
(h) The non-metal present in steel is ...
(i) The alloy in which one of the metals is mercury is called an
(j) The electrical conductivity and melting point of an alloy is.... than that of pure metals.
(k) The rocky material found with ores is called....

Q. An alloy of any metal with mercury is called amalgam and the electrical conductivity of an alloy is more than that of pure metals.

Q. (a) How does the painting of an iron object prevent its rusting?
(b) How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper?
(c) What is meant by 22 carat gold? Name the metals which are usually alloyed with gold to make it harder.

For preventing corrosion of copper, alloying of copper is done with tin and zinc forming brass and bronze respectively.

Q. Which of the following statement is correct?
(i) German silver is an alloy of silver, copper and zinc.
(ii) There is no zinc in brass.
(iii) Bronze is an alloy of copper and tin.

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