Question 3.

Which of the following changes are Reversible and Irreversible?

(a) Blowing of a balloon

(b) Folding a paper to make a toy aeroplane

(c) Rolling a ball of dough to make roti

(d) Baking cake in an oven

(e) Drying a wet cloth

(f) Making biogas from cow dung

(g) Burning of a candle

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Solution

Reversible changes : (a) Blowing of a balloon, (b) Folding a paper to make a toy aeroplane

(c) Rolling a ball of dough to make roti, (e) Drying a wet cloth.

Irreversible changes : (d) Baking of a cake, (f) Making biogas from cow dung, (g) Burning of a candle.

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Question 3.

Which of the following changes are Reversible and Irreversible?

(a) Blowing of a balloon

(b) Folding a paper to make a toy aeroplane

(c) Rolling a ball of dough to make roti

(d) Baking cake in an oven

(e) Drying a wet cloth

(f) Making biogas from cow dung

(g) Burning of a candle

Q. Which of the following change cannot be reversed?
(a) Blowing of a balloon
(b) Folding a paper to make a toy aeroplane.
(c) Rolling a ball of dough to make roti
(d) Baking cake in an oven
(e) Drying a wet cloth
(f) Making biogas from cow dung.
(g) Burning of a candle.

Question 12

Which of the following changes cannot be reversed?
Blowing of a ballon
Folding a paper to make a toy aeroplane
Rolling a ball of dough to make roti
Baking cake in an oven
Drying a wet cloth
Making biogas from cow dung
Burning of a candle

Q. Folding paper to make an aeroplane is a reversible change. Why?

A sheet of paper is used to make a paper boat. This is a ___ change. (reversible/irreversible)

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Question 3. Which of the following changes are Reversible and Irreversible? (a) Blowing of a balloon (b) Folding a paper to make a toy aeroplane (c) Rolling a ball of dough to make roti (d) Baking cake in an oven (e) Drying a wet cloth (f) Making biogas from cow dung (g) Burning of a candle

Reversible changes : (a) Blowing of a balloon, (b) Folding a paper to make a toy aeroplane (c) Rolling a ball of dough to make roti, (e) Drying a wet cloth. Irreversible changes : (d) Baking of a cake, (f) Making biogas from cow dung, (g) Burning of a candle.

Question 3.

Which of the following changes are Reversible and Irreversible?

(a) Blowing of a balloon

(b) Folding a paper to make a toy aeroplane

(c) Rolling a ball of dough to make roti

(d) Baking cake in an oven

(e) Drying a wet cloth

(f) Making biogas from cow dung

(g) Burning of a candle

Reversible changes : (a) Blowing of a balloon, (b) Folding a paper to make a toy aeroplane

(c) Rolling a ball of dough to make roti, (e) Drying a wet cloth.

Irreversible changes : (d) Baking of a cake, (f) Making biogas from cow dung, (g) Burning of a candle.