Tag: chemical bonding and structure

Questions Related to chemical bonding and structure

Which of the following alloy contains mercury?

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

  1. Bronze

  2. Zinc amalgam

  3. Brass

  4. German silver

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Correct Option: B
Explanation:

Amalgam is a substance formed by the reaction of mercury with another metal.Almost all metals form amalgams with mercury with exceptions being iron,platinum,tungsten and tantalum.Silver-mercury amalgams are important in dentistry.

Identify the alloy which does not contain zinc metal.

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

  1. Gun metal

  2. German silver

  3. Brass

  4. Bronze

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Correct Option: D
Explanation:

Bronze is an alloy of $Cu$ and $Sn$. It does not contain zinc metal.

Alloy                                 Metals present
Gun metal $Cu$ (88%) $Sn$ (10%) $Zn$ (2%)
German silver $Cu,\ Zn$ and $Ni$
Brass $Cu$ and $Zn$
Bronze $Cu$ and $Sn$

Solder is an alloy of  ____________.

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

  1. $Cu+Zn$

  2. $Pb+Sn$

  3. $Pb+Sb$

  4. $Cu+Sn$

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Correct Option: B
Explanation:

Solder is an alloy of Sn and Pb which makes alloy with high corrosion resistance.

Zinc metal is used in galvanization.

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:

Galvanization or galvanizing is the process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanizing, in which the parts are submerged in a bath of molten zinc.

An alloy is a _________ mixture of two or more metals, or a metal and a non-metal.
chemistry elements and compounds alloys and their properties metals, alloys and crystals chemical bonding and structure

  1. Heterogeneous

  2. Homogeneous

  3. Both A and B

  4. None of these

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Correct Option: B
Explanation:

An alloy is a homogenous mixture of two or more metals or non metals or nonmetals mixed in a molten state.

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.