Types of Elements and Their Properties Quiz

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What are the key characteristics of metals according to the text?

Highly reactive, non-malleable, non-lustrous

Ductile, malleable, lustrous, good conductors of heat and electricity (correct)

Brittle, non-conductors of heat and electricity

Soft, dull, poor conductors of heat and electricity

What is the classification of elements into metals and non-metals based on?

Physical and chemical properties like lustrousness and conductivity (correct)

Ability to conduct electricity

Reactivity with water

Color

How are basic oxides different from amphoteric oxides?

Basic oxides form salts with water, while amphoteric oxides dissolve in water

Basic oxides are insoluble in water, while amphoteric oxides are highly soluble

Basic oxides are acidic in nature, while amphoteric oxides are basic in nature

Basic oxides react only with acids, while amphoteric oxides react with both acids and bases (correct)

Which statement is true about alloys?

Alloys are homogeneous mixtures of two or more metals or a metal and a non-metal Signup and view all the answers

What is the process known as that involves extracting metals from their ores?

Metallurgy Signup and view all the answers

What happens when metals above hydrogen in the Activity series come in contact with dilute acids?

They release hydrogen gas Signup and view all the answers

What is the purpose of galvanisation?

To prevent rusting of steel and iron by coating them with zinc Signup and view all the answers

Why is pure iron not used in its pure state?

Because it is very soft and stretches easily when hot Signup and view all the answers

Which of the following is true about stainless steel?

It is a hard material that does not rust Signup and view all the answers

What happens to the properties of iron when it is alloyed with a small amount of carbon?

It becomes harder and stronger Signup and view all the answers

What is an alloy?

A mixture of two or more metals or a metal and a nonmetal Signup and view all the answers

How does alloying affect the properties of metals?

It changes the properties of metals Signup and view all the answers

Why are metals high up in the reactivity series obtained by electrolytic reduction?

Carbon cannot reduce their oxides Signup and view all the answers

What happens to the metals in the thermit process due to the large amount of heat evolved?

They melt and are produced in the molten state Signup and view all the answers

Why can't carbon reduce the oxides of highly reactive metals like sodium, magnesium, and calcium?

Carbon has a higher affinity for oxygen than these metals Signup and view all the answers

Which process is used to join railway tracks or cracked machine parts?

Thermit reaction Signup and view all the answers

Types of Elements and Their Properties Quiz

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