Match the Columns Column A Column B 1 Magnetisation of an iron needle A Chemical change 2 solid ⇌ cool heat vapour B Physical change 3 Burning of magnesium C Irreversible change 4 Ripening of fruit D Moist air 5 Rusting of iron E Reversible change

Column A Column B 1 Magnetisation of an iron needle Reversible change Magnetisation of iron is reversible because we can demagnetise magnetised iron needle. Column A Column B 2 Solid ⇌ cool heat vapour Physical change Conversion of solid to vapour is a physical change because it can be reversed by simple physical method. Column A Column B 3 Burning of magnesium Chemical change Burning of magnesium is a chemical change because, on burning, it produces magnesium oxide that has different properties than magnesium. Column A Column B 4 Ripening of fruit Irreversible change Ripening of fruit is an irreversible change because we cannot get back unripped fruit from this. Column A Column B 5 Rusting of iron Moist air In the presence of moist air rusting of iron takes place. Column A Column B 1 Magnetisation of an iron needle E. Reversible change 2 solid ⇌ cool heat vapour B. Physical change 3 Burning of magnesium A. Chemical change 4 Ripening of fruit C. Irreversible change 5 Rusting of iron D. Moist air.

E M B I B E

Science 7>Chapter 6 - Physical and Chemical Changes>FORMATIVE & SUMMATIVE ASSESSMENTS

S K Jain and Shailesh K Jain Solutions for Chapter: Physical and Chemical Changes, Exercise 5: FORMATIVE & SUMMATIVE ASSESSMENTS

Author:S K Jain & Shailesh K Jain

S K Jain Science Solutions for Exercise - S K Jain and Shailesh K Jain Solutions for Chapter: Physical and Chemical Changes, Exercise 5: FORMATIVE & SUMMATIVE ASSESSMENTS

Attempt the practice questions on Chapter 6: Physical and Chemical Changes, Exercise 5: FORMATIVE & SUMMATIVE ASSESSMENTS with hints and solutions to strengthen your understanding. Science 7 solutions are prepared by Experienced Embibe Experts.

Questions from S K Jain and Shailesh K Jain Solutions for Chapter: Physical and Chemical Changes, Exercise 5: FORMATIVE & SUMMATIVE ASSESSMENTS with Hints & Solutions

MEDIUM

7th CBSE

IMPORTANT

Science 7>Chapter 6 - Physical and Chemical Changes>FORMATIVE & SUMMATIVE ASSESSMENTS>Q 4

During the dissolution of urea, heat (Hint: When urea is dissolved in water cooling is observed)

EASY

7th CBSE

IMPORTANT

Science 7>Chapter 6 - Physical and Chemical Changes>FORMATIVE & SUMMATIVE ASSESSMENTS>Q 1

A change that can be reversed by reversing the conditions.

EASY

7th CBSE

IMPORTANT

Science 7>Chapter 6 - Physical and Chemical Changes>FORMATIVE & SUMMATIVE ASSESSMENTS>Q 2

A change in which only the physical properties of any substance get changed. (Chemical change/Physical change)

EASY

7th CBSE

IMPORTANT

Science 7>Chapter 6 - Physical and Chemical Changes>FORMATIVE & SUMMATIVE ASSESSMENTS>Q 3

The process in which a metal is displaced by a more reactive metal.(Displacement reaction/Substitution reaction)

EASY

7th CBSE

IMPORTANT

Science 7>Chapter 6 - Physical and Chemical Changes>FORMATIVE & SUMMATIVE ASSESSMENTS>Q 4

Write one word for the following:

A change which is irreversible, permanent and leads to the formation of one or more new substances.

MEDIUM

7th CBSE

IMPORTANT

Science 7>Chapter 6 - Physical and Chemical Changes>FORMATIVE & SUMMATIVE ASSESSMENTS>Q 5

Prevention of rusting of iron by coating it with zinc. (Greasing / Galvanisation)

HARD

7th CBSE

IMPORTANT

Science 7>Chapter 6 - Physical and Chemical Changes>FORMATIVE & SUMMATIVE ASSESSMENTS>MATCH THE COLUMNS

Match the Columns

Column A		Column B
1	Magnetisation of an iron needle	A	Chemical change
2	$solid ⇌_{cool}^{heat} vapour$	B	Physical change
3	Burning of magnesium	C	Irreversible change
4	Ripening of fruit	D	Moist air
5	Rusting of iron	E	Reversible change