A material is brittle if, when subjected to stress, it breaks without significant deformation. Brittle materials absorb relatively little energy prior to failure, even those of high strength. Breaking is often accompanied by a snapping sound.

Study Mate Science Class 8>Chapter 4 - Materials: Metals and Non-Metals>NaTTY NUT>Q 4

EASY

8th CBSE

IMPORTANT

Earn 100

What is brittleness?

Important Questions on Materials: Metals and Non-Metals

HARD

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 4 - Materials: Metals and Non-Metals>NUT Cracker>Q III

Out of

22

non-metals,

12

non-metals are gases.

MEDIUM

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 4 - Materials: Metals and Non-Metals>NUT Cracker>Q IV

Which one of the following will break down into a powdery mass on tapping with hammer?

MEDIUM

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 4 - Materials: Metals and Non-Metals>NUT Cracker>Q IV

Which one of the following is a good conductor of electricity?

EASY

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 4 - Materials: Metals and Non-Metals>NUT Cracker>Q IV

In which of the following reactions will hydrogen catch fire?

MEDIUM

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 4 - Materials: Metals and Non-Metals>NaTTY NUT>Q II

Galvanised iron rusts if there is a scratch on the zinc layer.

EASY

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 4 - Materials: Metals and Non-Metals>NaTTY NUT>Q 1

Differentiate between metals and non-metals.

MEDIUM

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 4 - Materials: Metals and Non-Metals>TOUGH NUT>Q 4

Nowadays, silverware blackens faster than it did during our grandparents' time. What do you think could be the reason?

HARD

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 4 - Materials: Metals and Non-Metals>TOUGH NUT>Q 2

Rinku is studying in class 8. The science teacher has announced a practical test. In this test the students will have to test different materials for their qualities and based on the qualities they will have to guess if the material is a metal or not. Rinku conducted the tests and put the findings as follows:

Sample no 1: malleable, sonorous and a good conductor of electricity

Sample no 2: non-malleable, non-sonorous and a poor conductor of electricity

Sample no 3: malleable, sonorous and a poor conductor of electricity

Rinku is not able to identify these samples as metals or non-metals. She asked her friend Jyothi to help her but jyothi refused.

Can you help Rinku to identify the metals from the above samples?