Question

Choose the correct answer.
Which of the following changes is a reversible change?
al Freezing of water
b. Burning of paper
C. Breaking of glass
d Sharpening of pencil
Chopping of an onion is:
a Physical change only
B. Chemical change only
Chemical and reversible change d. Physical and irreversible change
A wooden wheel is 100 cm in diameter. What should be the size of the metal rim
so that it fits firmly over it?
100 cm
b. 95 cm
110 cm
d. 105 cm
3.
A physical changes
a is always reversible.
c. may be reversible or irreversible.
b. is always irreversible.
d. none of the above​

Answer 1

1st ka a water 2nd ka physical and irreversible 3D ka d4 th lac