NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 3 - Metals and Non-Metals>Long Answer Type Questions>Q 61

EASY

10th CBSE

IMPORTANT

Earn 100

Explain the following:

NaCl is not a conductor of electricity in solid state whereas it does conduct electricity in aqueous solution as well as in molten state.

Important Questions on Metals and Non-Metals

EASY

10th CBSE

IMPORTANT

NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 3 - Metals and Non-Metals>Long Answer Type Questions>Q 61

Explain the following:

Iron articles are galvanised.

EASY

10th CBSE

IMPORTANT

NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 3 - Metals and Non-Metals>Long Answer Type Questions>Q 61

Explain the following:

Metals like Na, K, Ca and Mg are never found in their free state in nature.

HARD

10th CBSE

IMPORTANT

NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 3 - Metals and Non-Metals>Long Answer Type Questions>Q 62

Given below are the steps for extraction of copper from its ore. Write the reaction involved.

(i) Roasting of copper (I) sulphide.

(ii) Reduction of copper (I) oxide with copper (I) sulphide.

(iii) Electrolytic refining.

EASY

10th CBSE

IMPORTANT

NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 3 - Metals and Non-Metals>Long Answer Type Questions>Q 62

Draw a neat and well labelled diagram for electrolytic refining of copper.

MEDIUM

10th CBSE

IMPORTANT

NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 3 - Metals and Non-Metals>Long Answer Type Questions>Q 63

Of the three metals

X, Y

and

Z, X

reacts with cold water,

Y

with hot water and

Z

with steam only. Identify

X, Y

and

Z

and also arrange them in order of increasing reactivity.

MEDIUM

10th CBSE

IMPORTANT

NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 3 - Metals and Non-Metals>Long Answer Type Questions>Q 64

An element

A

burns with golden flame in air. It reacts with another element

B

, atomic number

17

to give a product

C

. An aqueous solution of product

C

on electrolysis gives a compound

D

and liberates hydrogen. Identify

A, B, C

and

D

. Also write down the equations for the reactions involved.

HARD

10th CBSE

IMPORTANT

NCERT EXEMPLAR PROBLEMS-SOLUTIONS SCIENCE Class X>Chapter 3 - Metals and Non-Metals>Long Answer Type Questions>Q 65

Two ores

A

and

B

were taken. On heating, ore

A

gives

{CO}_{2}

whereas, ore

B

gives

{SO}_{2}

. What steps will you take to convert them into metals?