Question

7. Write scientific reason.
a. Hydrogen is combustible, oxygen helps
combustion, but water helps to extinguish
fire.
b. Constituent substances of a colloid cannot
be separated by ordinary filtration.
c. Lemon sherbat has sweet, sour and salty
taste and it can be poured in a glass.
d. A solid matter has the properties of
definite shape and volume.​

Answer 1

Explanation:

a) as in chemical change the property of the individual matter changes.

b) as colloid having very tiny molecules.

c) Lemon sherbet has sweet and salty taste and it can be poured in a glass because lemon is citrus extract and corrosive taste.

d) as the molecule are very tightly packed and can only vibrate in they own place.

Answer 2

Answer:

because lemon juice is a citrus fruit

and due to more sour juice in it we feel more sour