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Substances W,...

Question

Substances W, X, Y, and Z have the following properties.
W: Hard, ductile, and malleable
X: Lustrous and soft
Y: Lustrous, bad conductor of heat and electricity
Z: Liquid, good conductor of heat and electricity, non-malleableb
Identify W, X, Y and Z.

A

W: Carbon; X: Aluminium; Y: Sodium; and Z: Sulphur

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B

W: Iron; X: Potassium; Y: Iodine; and Z: Mercury

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C

W: Sodium; X: Iron; Y: Potassium; and Z: Mercury

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D

W: Zinc; X: Sodium; Y: Iodine; and Z: Bromine

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Solution

The correct option is B W: Iron; X: Potassium; Y: Iodine; and Z: Mercury

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Q. The property/properties which enable copper metal to be used for making electric wires is / are :
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Substances W, X, Y and Z have the following properties.

W: Hard, ductile, and malleable

X: Lustrous, soft and non-sonorous

Y: Lustrous, bad conductor of heat and electricity

Z: Liquid, good conductor of heat and electricity, and non-malleable

Identify W, X, Y and Z.

Q. Materials which are generally hard, lustrous, malleable, ductile, sonorous and good conductors of heat electricity are:

Q. Non-metals are usually poor conductors of heat and electricity. They are non-lustrous; non-sonorous and non-malleable.
(a) Name a lustrous non-metal.
(b) Name a non-metal which exists as a liquid at room temperature.
(c) Name a non-metal is a good conductor of electricity.
(d) Name a non-metal which is known for its hardness.

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