Chapter Exam

Chapter 4: The World of Metals and Non metals — Online MCQ Test

Q: Which of the following is a metal?

Answer: B. Iron — Iron is a metal. It shows properties like lustre, malleability, and conductivity.

Q: The property of a metal that allows it to be beaten into thin sheets is called:

Answer: B. Malleability — Malleability is the property of metals by which they can be hammered into sheets.

Q: A metal ring produces a ringing sound when struck. This property is called:

Answer: C. Sonority — Sonority is the property of metals to produce a ringing sound when struck.

Q: A spoon made of iron gets rusted after some time. This is an example of:

Answer: B. Corrosion — Corrosion is the slow damage of metals by air, moisture, or other substances. Rusting of iron is a common example.

SCIENCE (CURIOSITY) · CLASS 7th · Karnataka State Board

Practice Chapter 4: The World of Metals and Non metals with a free chapter-wise online MCQ test for Karnataka State Board CLASS 7th SCIENCE (CURIOSITY). This chapter covers: Metals Non metals Malleability Ductility Sonority Conductivity Lustre Corrosion Alloys Insulators. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 4: The World of Metals and Non metals — Important Questions & Answers (FAQ)

Frequently asked questions from Karnataka State Board CLASS 7th SCIENCE (CURIOSITY) — Chapter 4: The World of Metals and Non metals, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is a metal?

A. Sulphur
B. Iron ✓
C. Carbon
D. Oxygen

Answer: B. Iron
Iron is a metal. It shows properties like lustre, malleability, and conductivity.

The property of a metal that allows it to be beaten into thin sheets is called:

A. Ductility
B. Malleability ✓
C. Sonority
D. Corrosion

Answer: B. Malleability
Malleability is the property of metals by which they can be hammered into sheets.

A metal ring produces a ringing sound when struck. This property is called:

A. Malleability
B. Ductility
C. Sonority ✓
D. Lustre

Answer: C. Sonority
Sonority is the property of metals to produce a ringing sound when struck.

A spoon made of iron gets rusted after some time. This is an example of:

A. Sonority
B. Corrosion ✓
C. Ductility
D. Lustre

Answer: B. Corrosion
Corrosion is the slow damage of metals by air, moisture, or other substances. Rusting of iron is a common example.

Which statement is correct about alloys?

A. Alloys are made by mixing two or more metals or a metal with a non-metal ✓
B. Alloys are always non-metals
C. Alloys cannot be used in daily life
D. Alloys are pure substances

Answer: A. Alloys are made by mixing two or more metals or a metal with a non-metal
An alloy is a mixture made to improve the properties of a metal. For example, steel is an alloy of iron and carbon.

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