Question

3. Which of the following changes can not be reversed?
A. Dissolving sugar in water
B. Opening a door
C. Hardening of cement
D. Rolling of chapati
4. Raju's grandfather is suffering from diabetes. His doctor advised him to take
milk in the form of lassi with less sugar and less fat content. Which of the
following methods would be most appropriate for Raju to prepare it?
A Filtration
B. Decantation
C. Churning
D. Winnowing
5. Cooking of food is a type of ....?
A. Physical change where energy is released.
B. Physical change where energy is absorbed.
C. Chemical change where energy is released.
D. Chemical change where energy is absorbed.​

Answer 1

3. C) Hardening of a cement

4. C) Churning

5. D)

Please mark me as the brainliest

Answer 2

Answer:

Explanation:

 

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.

Solution:

(d) : The ring expands on heating and comes back to its original size on cooling. The change is reversible.