Tag: elements and compounds

Questions Related to elements and compounds

The primary metal in an alloy is called:

chemistry elements and compounds alloys and their properties metals, alloys and crystals chemical bonding and structure

  1. base

  2. metalloid

  3. crystal

  4. none of above

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Correct Option: A
Explanation:

The term alloy is used to describe a mixture of atoms in which the primary constituent is a metal. The primary metal is called the base, the matrix, or the solvent.

Statement 1 : A mixture of pure metals is called an alloy. The melting point of an alloy will be lower than either of the component metal.
Statement 2 : The new bonds are weaker.

chemistry elements and compounds alloys and their properties metals, alloys and crystals chemical bonding and structure

  1. Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1

  2. Both Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1

  3. Statement 1 is correct but Statement 2 is not correct

  4. Statement 1 is not correct but Statement 2 is  correct

  5. Both the Statement 1 and Statement 2 are not correct

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Correct Option: A
Explanation:

Both Statement 1 and Statement 2 is correct and Statement 2 is the correct explanation of Statement 1.


A mixture of pure metals is called an alloy. The melting point of an alloy will be lower than either of the component metal because the new bonds are weaker.

Hence, the correct option is A.

Tinned iron sheets are used for making boxes for fruits, oils, vegetables etc.

chemistry elements and compounds alloys and their properties metals, alloys and crystals chemical bonding and structure

  1. True

  2. False

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Correct Option: A
Explanation:

Tinning is the process of thinly coating sheets of wroughtiron or steel with tin, and the resulting product is known as tinplate. While once more widely used, the primary use of tinplate now is the manufacture of tin cans. Formerly, tinplate was used for cheap pots, pans and other holloware. It has an extremely beautiful metallic luster as well as excellent properties in corrosion resistance, solderability, and weldability. 

So it's true.

Tin is used for making fusible alloys.

chemistry elements and compounds alloys and their properties metals, alloys and crystals chemical bonding and structure

  1. True

  2. False

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Correct Option: A
Explanation:

A fusible alloy is a metal alloy capable of being easily fused, i.e. easily meltable, at relatively low temperatures. The most widely used fusible alloys contain high percentages of bismuth, combined with lead, tin, cadmium, indium and other metals. Bismuth has an impact on the melting point, as well as the growth and shrinkage characteristics of the alloys.

The main component of bronze is:

chemistry elements and compounds alloys and their properties metals, alloys and crystals chemical bonding and structure

  1. cobalt

  2. copper

  3. tin

  4. aluminium

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Correct Option: B
Explanation:

Bronze is an alloy consisting primarily of copper, commonly with about 12% tin and often with the addition of other metals (such as aluminium, manganese, nickel or zinc) and sometimes non-metals or metalloids such as arsenic, phosphorus or silicon.

$SiO _2$ (Silica) occurs in the form of:

chemistry elements and compounds alloys and their properties metals, alloys and crystals chemical bonding and structure

  1. sand

  2. quartz

  3. opal

  4. all of these

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Correct Option: D
Explanation:

Silica also known as silicon dioxide. It is found in nature as quartz, sand or opal. Silica more so than almost any material exists in many crystalline forms called polymorphs. Silica in the form of sand is used as ingredient in sand casting.

_________ cannot be readily separated by physical means.

chemistry elements and compounds alloys and their properties metals, alloys and crystals chemical bonding and structure

  1. Mixtures

  2. Metals

  3. Alloys

  4. Non-metals

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Correct Option: C
Explanation:

Alloys are metallic materials consisting of two or more elements combined in such a way that they cannot be readily separated by physical means. More than 90% of metals used are in the form of alloys.

Alloys are the examples of mixtures of:

chemistry elements and compounds alloys and their properties metals, alloys and crystals chemical bonding and structure

  1. solid-in-gas

  2. gas-in-solid

  3. gas-in-gas

  4. solid-in-solid

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Correct Option: D
Explanation:

An alloy is a mixture of two or more metals. Thus, it is solid in solid.

The alloy bronze contains copper and tin. This is a:

chemistry elements and compounds alloys and their properties metals, alloys and crystals chemical bonding and structure

  1. homogeneous mixture

  2. heterogeneous mixture

  3. solid solution of two immiscible metals

  4. pure substance

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Correct Option: A
Explanation:

Bronze is an alloy consisting primarily of copper, commonly with about 12% tin and often with the addition of other metals (such as aluminium, manganese, nickel or zinc) and sometimes non-metals or metalloids such as arsenic, phosphorus or silicon.

All the alloys are homogeneous mixture.

Type metal is a well-known alloy made out of the three metals:

chemistry elements and compounds alloys and their properties metals, alloys and crystals chemical bonding and structure

  1. $Pb,\ Sb, \ Sn$

  2. $Ni,\ Cu,\ Ag$

  3. $Ag,\ Ni,\ Zn$

  4. $Al, \ Cu, \ Zn$

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Correct Option: A
Explanation:

Type metal is an alloy of lead, tin and antimony in different proportions depending on the application, be it individual character mechanical casting for hand setting, mechanical line casting or individual character mechanical typesetting and stereo plate casting.