Materials: Metals & Non-metals MCQ | Class 8 Science Ch 4 Quiz
Question 1 / 25
Class 8 Science Chapter 4 Objective Questions
This MCQ test for Chapter 4 (Materials: Metals and Non-metals) revises metallic and non-metallic properties, chemical reactivity, and everyday applications. It includes displacement reactions, corrosion prevention, and uses of alloys.
In this test, questions cover:
- Physical properties: lustre, malleability, ductility, conductivity
- Chemical properties: oxides, reactions with acids, displacement
- Alloys and applications: bronze, galvanization, protective oxides
- Non-metal uses: graphite conduction, sulfur vulcanization, phosphorus in matches
Answer all 25 questions and review the score at the end to analyze preparation. Good luck!
Which property is typical of metals?
Metals generally conduct electricity well due to free electrons.
Which element is a liquid non-metal at room temperature?
Bromine is a reddish-brown liquid non-metal at room temperature.
Which metal is the lightest among the following?
Aluminium has low density, making it lighter than iron, copper, and lead.
Non-metals generally form which type of oxides?
Non-metal oxides usually dissolve in water to form acids.
Which metal is stored under kerosene to prevent reaction with air?
Sodium reacts vigorously with air and moisture, so it is kept under kerosene.
A displacement reaction will occur when:
More reactive metals displace less reactive metals from their compounds.
Which of the following shows sonority?
Metals like copper produce a ringing sound when struck.
Which pair is correctly matched with electrical conductivity?
Graphite, a form of carbon, conducts electricity due to delocalized electrons.
Which metal is most commonly used for electrical wires?
Copper combines high conductivity with reasonable cost and ductility.
Which process protects iron from rusting by coating with zinc?
A protective zinc layer prevents iron from reacting with moisture and oxygen.
An oxide that reacts with both acids and bases is called:
Amphoteric oxides like Al2O3 react with both acids and bases.
Which statement about non-metals is correct?
Non-metals are typically brittle when solid and lack metallic properties.
Which gas is evolved when a metal reacts with a dilute acid?
Metals above hydrogen in the reactivity series release hydrogen with dilute acids.
Which metal is used for making food cans due to corrosion resistance?
Tin resists corrosion and is used to coat steel for food cans.
Which non-metal is essential for the process of combustion?
Oxygen supports combustion by reacting with fuels.
Which is the most malleable metal listed?
Gold can be beaten into extremely thin sheets, showing high malleability.
Which non-metal is used in making matchstick heads and safety matches?
Red phosphorus is used in safety matches due to controlled reactivity.
Bronze is an alloy of:
Bronze consists mainly of copper with tin as the primary alloying element.
Which metal is used in thermometers due to uniform expansion?
Mercury is a liquid metal with predictable expansion, used in traditional thermometers.
Which non-metal exists in different allotropic forms like diamond and graphite?
Carbon exhibits allotropy with structures having distinct properties.
Which reaction will likely occur? Fe(s) + CuSO4(aq) → ?
Iron displaces copper from its sulfate due to higher reactivity.
Which metal forms a protective oxide layer preventing further corrosion?
Aluminium forms a thin, adherent Al2O3 layer that protects the metal.
Which non-metal is used for vulcanization of rubber?
Sulfur cross-links rubber chains, improving elasticity and strength.
Which property best explains metal wire formation?
Ductility is the ability to be drawn into thin wires.
Which non-metal is essential for plant growth as a nutrient in fertilizers?
Sulfur is a vital macronutrient in plants for amino acids and proteins.
Your Result
You answered 0 out of 25 questions correctly.