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Class 8 Chemistry Reactivity Worksheet

This document is a revision worksheet for Class 8 Chemistry focusing on Chapter 5, Reactivity. It includes questions and answers related to metal reactivity, displacement reactions, and experimental procedures. The worksheet aims to help students prepare for their Term-II assessments.

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rspuri1941
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55 views7 pages

Class 8 Chemistry Reactivity Worksheet

This document is a revision worksheet for Class 8 Chemistry focusing on Chapter 5, Reactivity. It includes questions and answers related to metal reactivity, displacement reactions, and experimental procedures. The worksheet aims to help students prepare for their Term-II assessments.

Uploaded by

rspuri1941
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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VIVEK HIGH SCHOOL (2024-2025)

CLASS 8
Chemistry (Term-II)
Revision worksheet-Chapter-5 Reactivity
Name Roll No.

Date Class & Section

Q1.

ANS- 1. Not Possible


2. Possible
3. Possible
4. Not Possible

Q2.

ANS- 1. Zinc + copper sulphate→ Zinc sulphate + copper


2. Magnesium + silver nitrate→ Magnesium nitrate + Silver
3. Potassium + zinc nitrate → potassium nitrate + zinc
4. Gold + copper sulphate → reaction not possible

Q3.

Revision worksheet/Class VIII/Chm/Ms.Harshini2024-25


Revision worksheet/Class VIII/Chm/Ms.Harshini2024-25
ANS- 1. less vigorously
2 It does not react at all; give credit for silver reacts less / is less reactive than copper.
3 Zinc will react more quickly than iron with dilute acid.
4 No; there will not be a displacement reaction because copper is less reactive than iron.

Q3.

ANS- a It tells you that zinc is more reactive than copper.


b zinc + copper sulfate → zinc sulfate + copper
Q4.

Revision worksheet/Class VIII/Chm/Ms.Harshini2024-25


ANS- Metal E is the most reactive because it has the most displacement reactions.

Q5.

The metals that are more reactive than C, copper, and less reactive than D, zinc, are lead and iron.
Iron is more reactive than lead, so A is lead and F is iron. The metals that are more reactive than D,
zinc, are magnesium and aluminium. B is less reactive than E, so B is aluminium and E is magnesium.
Learners should not suggest an alkali metal as these are too reactive in water to use in displacement
reactions.

Revision worksheet/Class VIII/Chm/Ms.Harshini2024-25


Q6.

ANS- 1 The volume of oxygen used, the time taken to transfer the deflagrating spoon, the time taken
to light the magnesium.

2 magnesium + oxygen → magnesium oxide

3. Credit: axes the correct way round and correctly labelled, including units; suitable choice of
scale; points plotted accurately and joined appropriately.

Revision worksheet/Class VIII/Chm/Ms.Harshini2024-25


Revision worksheet/Class VIII/Chm/Ms.Harshini2024-25
Revision worksheet/Class VIII/Chm/Ms.Harshini2024-25

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