Tag: metals

Questions Related to metals

Which allotrope of carbon do not conduct electricity?

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. Graphite

  2. Diamond

  3. Fullerene

  4. Both b and c

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Correct Option: D
Explanation:

Carbon is a non-metal which have allotropic form that is graphite, diamond and fullerene. Out of this three only graphite is conductor of electricity. Diamond and fullerene do not conduct electricity.

Non-metals are brittle while metals are ductile. Why?

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. Because of lesser extent of bonding in non-metals

  2. Because of greater extent of bonding in non-metals

  3. Because of smaller size of non-metallic atoms

  4. Because of lower conductivity of non-metals

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Correct Option: A
Explanation:

The basic difference between metals and non-metals is the extent of bonding.Metals have very high extent of bonding than that in non-metals which makes the metal malleable. and non-metals brittle.

Which of the following elements cannot be beaten into thin wires?

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. $O$

  2. $P$

  3. $S$

  4. All of these

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Correct Option: D
Explanation:

Non-metals are generally non-ductile and cannot be beaten into thin wires. All given elements $O,P,S$ are non metals and do not have property of ductility. 

One metal which is not ductile at room temperature is:

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. $Cu$

  2. $Sn$

  3. $Pb$

  4. $Hg$

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Correct Option: D
Explanation:

$Hg$ is liquid at room temperature and cannot be beaten into thin wire; thus is not ductile at room temperature. All other metals $Cu, Sn ,  Pb$ are ductile at room temperature. 

Which of the following element is not in the liquid state at room temperature?

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. $Hg$

  2. $Li$

  3. $Ga$

  4. $Br$

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Correct Option: B
Explanation:
Bromine and mercury are metal which is liquid at room temperature. Gallium a brittle solid at low temperatures, and a liquid at temperatures greater than $29.76^o C$ (slightly above room temperature).Thus gallium is liquid at room temperature.
Bromine is a liquid because electrons are well apart from the nuclei so they are easily distorted .Intermediate intermolecular forces exists and thus it is in liquid state.
 Lithium  is a solid at room temperature.

Sulphur extracted from natural sources is called roll sulfur.

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. True

  2. False

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Correct Option: B
Explanation:

Sulphur extracted from natural sources is called brimstone. 

B is correct

Find the incorrect match.

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. Fine duct of aluminium - Paints and Lacquers

  2. Reducing agent in the manufacture of dye-stuffs, paints, etc. - copper dust

  3. For cutting tools and crushing machines - Chrome steel

  4. For making cables, automobiles and aeroplane parts - Nickel steel

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Correct Option: B
Explanation:

The fine duct of aluminium is used in paints and lacquers. For cutting tools and crushing machines chrome steel is used.

For making cables, automobiles and aeroplane part – nickel steel is used. But copper dust is not used as a reducing agent in the manufacture of dyestuffs and paints. So this second is the mismatch.

Correct option is B.

Iron is used in construction of bridges and houses.

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. True

  2. False

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Correct Option: A
Explanation:

There are many different types of steels available today. Each type is made with iron combined with different elements including carbon, silicon, and nickel among others. Steel is an important component in every structure, in every type of construction. Therefore Buildings, bridges, skyscrapers, and other types of construction would not be complete if it does not include iron in its framework. 

Aluminum is used to make electrical wire.

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. True

  2. False

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Correct Option: A
Explanation:

Aluminium is used in making electrical wires as it is light, cheap and more conductive than copper.

Which of the following non-metal is used for the manufacture of fertilizers?

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. Chlorine

  2. Sulphur

  3. Phosphorus

  4. None of the above

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Correct Option: C
Explanation:

Phosphorus is used for the manufacture of fertilizers.