Question

Classify as Physical and chemical changes with reason :

a) Making fruit salad with raw fruits

b) Dissolving sugar in water

c) Melting of chocolate

d) Boiling of potatoes

e) Burning of wood

f) Rusting of almirah

g) Passing electric current through water and the water breaking down into hydrogen and oxygen

h) Sun-tanning

i) Bread rising

j) Milk turning sour

k) Burning LPG

please say me with reasons
please answer me fast ​

Answer 1

Answer:

A. PHYSICAL CHANGE

B. CHEMICAL

C. PHYSICAL

D. CHEMICAL

E. CHEMICAL

F. CHEMICAL

G. CHEMICAL

H. CHEMICAL

I. CHEMICAL

J. CHEMICAL

K. BOTH CHEMICAL , PHYSICAL

Explanation:

Answer 2

Answer:

Physical changes-

    (a)Making fruit salad

    (b)Dissolving sugar

    (c)Melting of chocolate

Chemical changes-

    (a)Boiling of potatoes

    (e)Burning of wood

     (f)Rusting of almirah

    (g)Passing electric current through water and the water breaking down into hydrogen and oxygen

    (h)Sun-tanning

      (i) Bread rising

      (j) Milk turning sour

     (k) Burning LPG

Explanation:

Physical changes- Changes that take place in physical properties like shape, size, etc.. No new substance is formed during a Physical reaction.

Chemical changes- Changes that take place in chemical properties like Density, Solubility, etc... Here new substance is formed during reaction.

Thus the above categories are classified on the basis of these reasons.

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