Question

B. Match the Columns. Column A Column B (a) Most reactive 1. A liquid nonmetal 2. Ringing sound 3. Diamond 4. Metallic oxides 5. Potassium (b) Carbon (c) Bromine (d) Sonorous (e) Basic






please ans it's urgent​

Answer 1

Explanation:

NCERT Exemplar solution for Class 8 Science Chapter 4 Materials Metals and Non-Metals is the best study material you can utilise for effective exam preparation of Class 8 and competitive examinations. NCERT exemplar boosts your confidence by providing extra knowledge. After studying Exemplar question you will be able to solve all varieties of questions you get in the examination.

NCERT Exemplar Solutions for Class 8 Science Materials Metals and Non-Metals presented here has answers to 12 Multiple choice questions, 9 very short answer questions, 6 short answer questions, and 5 long answer questions.

Download PDF of NCERT Exemplar Class 8 Science Solutions for Chapter 4 – Materials Metals And Non-Metals

Which of the following is not a metal?

(a) Copper

(b) Sulphur

(c) Aluminium

(d) Iron

Soln:

Answer is (b) Sulphur

2. The substance that will be flattened on beating with a hammer is

(a) Crystal of iodine

(b) Lump of sulphur

(c) Piece of coal

(d) Zinc granule

Soln:

Answer is (d) zinc granule

Explanation:

Metals can be beaten into thin sheets whereas non-metals break into pieces on hitting hence answer is (d) zinc granule.

3. Boojho has learnt that non-metals on beating with a hammer are generally broken into pieces. Which of the following is a nonmetal?

(a) Iron nail

(b) Aluminium wire

(c) Copperplate

(d) Piece of coal

Soln:

Answer is (d) Piece of coal

Explanation:

Iron, Copper and aluminium are metals whereas coal is a non-metal hence answer is (d) piece of coal.

4. Materials which can be drawn into wires are called ductile. Which of the following is not a ductile material?

(a) Silver

(b) Copper

(c) Sulphur

(d) Aluminium

Soln:

Answer is (c) sulphur

Explanation:

Ductility is the property of metals. Here Sulphur is non-metal which is not have ductile property.

5. Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?

(a) Iron

(b) Sodium

(c) Gold

(d) Magnesium

Soln:

Answer is (b) Sodium

Explanation:

Sodium is highly reactive metals which looks soft and can be cut into pieces by using a knife.