Choose the incorrect statement regarding the physical properties of metals and non-metals.

Sodium can be cut like a soap.

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Caesium melts in our hands.

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Graphite is a good conductor of electricity

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Melting point of gllium's melting point is

70^{0} C

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Solution

The correct option is D Melting point of gllium's melting point is $70^{0} C$
-Caesium and gallium, though being metals, have really low melting points so they melt when kept on the palm. The melting point of gallium is 29 °C.
-Sodium is an alkali metal and is soft enough to be cut with a knife.
-Graphite is an allotrope of carbon and is a good conductor of electricity.

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Similar questions

Q. Choose the incorrect statement regarding the physical properties of metals and non-metals.

(a) Name two physical properties each of sodium and carbon in which their behaviour is not as expected from their classification as metal and non- metal respectively.
(b) Name two metals whose melting points are so low that they melt when held in the hand.

Q. Which is incorrect physical property of metals?
(a) Metals can be given different forms and shapes due to its malleability and ductility.
(b) Metals have low tensile strength.
(c) Most of the metals have low melting point.

Name the following : [3 MARKS]

(a) A lustrous liquid metal.
(b) A liquid non-metal
(c) A metal which can be cut with a knife
(d) A non-metal which is good conductor of electricity.
(e) An element which melts when kept on the palm.
(f) Good conductor of heat.

Q. Name : [5 MARKS]
(a) A liquid non-metal.
(b) A metal with dull appearance.
(c) A metal with low melting and boiling points.
(d) A non-metal with very high melting and boiling points.
(e) A metal which can float on water.
(f) A metal which can be cut with a knife.
(g) A metal which is a bad conductor of heat and electricity.
(h) A non-metal which is ductile.
(i) A non-metal used in alloys.
(j) A non-malleable metal.

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