Name the following:
(a) a non-metal present in steel
(b) a metal which reacts vigorously with cold water
(c) a non-metal used to vulcanise rubber
(d) a metal stored in oil
(e) a metal that becomes black in the presence of hydrogen sulphide
(f) the gas released when metals react with water
(g) a metal that replaces silver from silver nitrate
(h) a metal used for galvanising iron
(i) a metal that will displace copper from copper sulphate solution
(j) a noble metal

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Solution

(a) The non-metal present in steel is carbon.
(b) A metal which reacts vigorously with cold water is sodium.
(c) A non-metal used to vulcanise rubber is sulphur.
(d) A metal stored in oil is sodium.
(e) A metal that becomes black in the presence of hydrogen sulphide is silver.
(f) Hydrogen gas is released when metals react with water.
(g) A metal that replaces silver from silver nitrate is copper.
(h) A metal used for galvanising iron is zinc.
(i) A metal that will displace copper from copper sulphate solution is iron.
(j) Gold is a noble metal.

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(a) All metals exist in solid form at room temperature.

(b) Coal can be drawn into wires.

(d) Sodium is a very reactive metal.

(e) Copper displaces zinc from zinc sulphate solution.

(f) Rust formed on iron objects is basic in nature.

(g) Non-metals react with water to form a gas which burns with a 'pop' sound.

Copper sulphate solution reacts with iron metal to form copper metal. This is a ______________.

Fill in the following balnks with suitable words:

(a) Metals are ........................... conductors of heat and ............................

(b) Most non-metals are ........................... conductors of heat and ...........................

(d) Metals react with acids to produce ........................... gas.

(e) Iron is more ........................... than copper.

(f) Metals form ........................... oxides whereas non-metals form ........................... oxides.

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