Reversible Change
Trending Questions
Breaking of glass is a physical change.
- True
- False
Salt can be separated from its solution (salt dissolved in water), because:
(a) Mixing of salt in water is a change that can be reversed by heating and melting of salt.
Mixing of salt in water is a change that cannot be reversed.
Mixing of salt in water is a permanent change.
Mixing of salt in water is a change that can be reversed by evaporation.
Question 3
An iron ring is heated. Which of the following statement about it is incorrect?
(a) The ring expands
(b) The ring almost comes to the same size on cooling
(c) The change in this case is reversed
(d) The ring changes its shape and the change cannot be reversed
Please give me a good answer for this
A sheet of paper is used to make a paper boat. This is a
Reversible change
Irreversible change
Reversible change and irreversible change
It is not a change
Question 1
Pick the change that can be reversed from the following
(a) Cutting of trees
(b) Melting of ghee
(c) Burning of candle
(d) Blooming of flower
Question 4
While lighting a candle, Paheli observed the following changes:
(1) Wax was melting.
(2) Candle was burning.
(3) Size of the candle was reducing
(4) Melted wax was getting solidified.
Of the above, the changes that can be reversed are
Identify the change and state whether energy is absorbed or evolved in Growth in plants.
Which among the following is an example of a reversible change?
Making sand castle on beach
Making egg omelette
Cutting of trees
Burning petrol
In a ____________ change, no new substance is formed.
_______ changes are usually reversible in nature.
Give reasons for the following:
Physical change is a temporary change.
(b) Give reasons:
(i) Ripening of fruit is a desirable change.
(ii) Curdling of milk is a slow change.
(ii) Digestion of food is an irreversible change.
The dissolving of sugar in water is a _________ change.
physical
chemical
irreversible
can't say
2. State whether this change can be reversed or not.
(e) Drying a wet cloth.
(b) Give reasons:
(i) Ripening of fruit is a desirable change.
(ii) Curdling of milk is a slow change.
(ii) Digestion of food is an irreversible change.
The growing of a moustache over a boy's face is a reversible change.
True
False
A physical change is temporary and can be reversed by changing the condition in most cases.
- True
- False
The stretching of a rubber band is an irreversible change.
- True
- False
- Chemical change
- Physical change
- Reversible change
- None of the above
Why rusting of iron cannot be called a periodic change?
The mass of the substance remains the same during a physical change.
- True
- False
- Frying a Puri
- knitting sweater
- Dissolution of sugar in water
- Melting of candle wax
The making of a ring from gold is a __________ change and making a statue from wood is a __________ change.
- reversible, irreversible
- irreversible, reversible
- reversible, reversible
- irreversible, irreversible
Question 1
To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?
What is a physical change, explain with an example?
(i) Wax was melting.
(ii) Candle was burning.
(iii) Size of the candle was reducing.
(iv) Melted wax was getting solidified.
Of the above, the changes that can be reversed are:
[2 marks]
[NCERT Exemplar Q.4]
[Reversible changes]
- (i) and (iv)
- (i) and (ii)
- (iii) and (iv)
- (ii) and (iii)
