Question

Write true or false against the following statements :

i) Winnowing method is used to parate solid liquid mixtures.

ii) Rusting of iron is a chemical change.

iii) Solids have the largest inter-molecular space.

iv) Earthquake is a desirable change.

v) All solids, on heating first change to the liquid and then to the gaseous state always.

vi) Cutting of paper into pieces is a chemical change.​

Answer 1

Answer:

i) False

(Only separates Solid and solid mixtures)

ii) True

iii) False

(Solids has smallest inter-molecular space, gases have the larget)

iv) False

(They have the potential to cause huge economical and structural loses, thus they are undesirable)

v) False

(Some solids (Naphthalene) also goes sublimation (ie. from solid to gaseous state directly)

vi) False

(No new product is formed)