Tag: chemistry

Questions Related to chemistry

Find the odd one out.

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

  1. Constantan

  2. Manganin

  3. Nichrome

  4. Chromium

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Correct Option: D
Explanation:

Only chromium is not an alloy.
Constantan is a copper–nickel alloy.
Manganin is an alloy of  86% copper, 12% manganese, and 2% nickel.
Nichrome is an alloy of nickel, chromium.

State whether true or false :

Cars are made from steel which is an alloy of carbon and aluminium.

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: B
Explanation:

The most common material used in building cars is Steel because it is strong, easy to work with, cheap, readily available and almost every car will have some steel in it. 


It can be used for parts like the roof, chassis, wheels, brakes, exhaust and engine. It doesn’t take extremely specialised tools or knowledge to produce, manufacture and repair steel so is the cheapest metal used in car building.


But steel is an alloy of iron and carbon and not aluminium and carbon.
Statement is false.

Option B is correct.

Metal present in gun metal are:

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

  1. $Cu,\ Zn,\ Ni$

  2. $Cu,\ Sn,$ and $Zn$

  3. $Cu,\ Sn$

  4. $Cu,\ Al$

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Correct Option: B
Explanation:

101652

1) Cu, Sn and Zn.

2) Gunmetal, also known as red brass, is a type of bronze – an alloy of copper, tin, and zinc.

3) Gunmetal can also mean steel treated to simulate gunmetal bronze.

Steel is heated to the very high temperature and then plunged into cold water. This process is called _______.

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

  1. tempering

  2. anodising

  3. regulating

  4. anealing

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Correct Option: A
Explanation:

Annealing is the process of heating the steel to high temperature to soften it and it undergoes three phases. Quenching involves heating the steel and tempering in water or oil. This rapid cooling results in hard and brittle steel.

An alloy is :

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

  1. an element

  2. a compound

  3. a homogeneous mixture

  4. a heterogeneous mixture

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Correct Option: C
Explanation:

An alloy is a homogeneous mixture of two or more metals in a definite proportion. 


The alloy is made by mixing a metal in the molten state with another metal and then solidified.

Hence the correct option is C.

Identify the alloy containing a non- metal as a constituent in it.

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

  1. Bell metal

  2. Bronze

  3. Invar

  4. Steel

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Correct Option: A

Spiegeleisen is an alloy of :

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

  1. $Cu+Zn+Ni$

  2. $Ni+Cr$

  3. $Mn+si+C$

  4. $Fe+Cr+Ni$

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Correct Option: C
Explanation:

Spiegeleisen is a ferromanganese alloy.
It contains iron, manganese and carbon.
Manganese is present to about 15%.

An alloy of copper, silver and gold is found to have copper constituting the ccp lattice. If silver atoms occupy the edge wares and gold is resent at a body centre. the alloy has a formula?

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

  1. $ Cu _{4}Ag _{2}Au $

  2. $ Cu _{4}Ag _{4}Au $

  3. $ Cu _{4}Ag _{3}Au $

  4. CuAgAu

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Correct Option: C

Bell metal is an alloy of :

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

  1. Sn+Pb

  2. Cu+Sn

  3. Sn+Sb

  4. none of these

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Correct Option: C

Which of the following is an alloy?

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

  1. Silver

  2. Gallium

  3. $22$ carat gold

  4. $24$ carat gold

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Correct Option: C
Explanation:

22 karat gold contains 22 parts gold and 2 parts of other metals added as alloy. ... 18 karat gold contains 18 parts pure gold with 6 parts of other metals added. In the West the karat is expressed in fineness.

Hence 22 carat gold is an alloy.