Question

. Fill in the blanks from the list of words given below.

(evolved, crystallization, rust, chemical, physical)

1. Explosion of fire works is a
....................change.

2.No new substance is formed in.................change

3. Energy is...................in the formation of curd from milk.

4. Large crystals of pure substance are obtained by.........

5. Ships suffer a lot of damage from.. . . . . . . . inspite of being painted.


F. State whether the statements given below are true or false.

1. A reddish deposit formed on an iron nail, when placed in a copper sulphate solution is of
copper metal.

2. Rusting of iron takes place is the presence of moist air.

3. Lime water is a solution of calcium carbonate in water.

4. Cooking of rice is a physical change.

5. When bread goes stale, a physical change takes place.

6. Magnesium oxide reacts with water to form magnesium hydroxide which is acidic in
character.

7. The gas produced when washing soda 'reacts with dilute sulphuric acid is carbon
monoxide.


Match the following.

Column 'A'
1. growing hair

2. Breaking of mirror

3. Galvanisation

4. Vinegar

5. Atmospheric pollution

colum B

a due to chemical change

b acetic Acid

c slow change

d physical change

e the process of depositing zinc on iron metal





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Answer 1

Answer:

fill in the blanks

chemical

physics

evovled

crystallization

rust

Explanation:

hope it helps