Lesson 8 Periodic Classification of Elements

Q1. Which furnace is commonly used to extract iron from its ore?

Blast furnace Electrolytic cell Calorimeter Manometer

Q2. Bronze is mainly an alloy of:

Copper and tin Copper and zinc Iron and carbon Gold and silver

Q3. Steel is mainly made of:

Iron and carbon Copper and zinc Copper and tin Sodium and chlorine

Q4. What is an amalgam?

An alloy containing mercury Only an iron alloy An alkali metal salt Ore waste

Q5. An element with electronic configuration 2,8,8 belongs to which group?

18 17 1 2

Q6. What are essential conditions for rusting of iron?

Oxygen and water/moisture Light only Nitrogen only Vacuum

Q7. What are Group 2 elements called?

Alkaline earth metals Alkali metals Halogens Noble gases

Q8. Elements in the same group generally have similar valence-electron patterns.

Group Period Isotope Molecule

Q9. Across a period, ionization energy generally:

Increases Decreases Remains unchanged Becomes zero

Q10. What is an alloy?

A mixture of two or more elements with metallic character A pure metal A gas Only a radioactive element