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Metals and Non-Metals Physical Properties Observations

12 Questions

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Metals and Non-Metals Physical Properties Observations

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Questions and Answers

When burning magnesium in air, what color flame is produced?

Blue

White (correct)

Red

Yellow

Which litmus paper should be used to test the product formed on burning magnesium?

Blue litmus paper

Neither red nor blue litmus paper

Red litmus paper

Both red and blue litmus paper (correct)

What type of oxides do most non-metals produce when dissolved in water?

Amphoteric oxides

Acidic oxides (correct)

Neutral oxides

Basic oxides

Which metal mentioned is a liquid at room temperature?

Sodium Signup and view all the answers

What property of metals allows them to be good conductors of heat?

High melting points Signup and view all the answers

Why are silver and copper known as the best conductors of heat among the metals?

High melting points Signup and view all the answers

Which statement about the physical properties of metals and non-metals is incorrect based on the text?

Alkali metals have high melting points compared to other metals. Signup and view all the answers

In Activity 3.5, students observed that metals have high melting points except for:

Gallium Signup and view all the answers

Diamond, an allotrope of carbon, is known for its:

High hardness Signup and view all the answers

Why are school bells often made of metals according to the text?

Due to their sonorous nature Signup and view all the answers

What is the purpose of coating electric wires with PVC or rubber-like material?

To protect against electric shocks Signup and view all the answers

What can be inferred about the chemical properties of alkali metals based on the text?

They can be cut with a knife due to their softness. Signup and view all the answers