Choose the correct answer.1. When a woolen yarn is knitted to get a sw

Choose the correct answer.1. When a woolen yarn is knitted to get a sweater, the change can be described as a) Physical change b) Chemical change c) Endothermic reaction d) Exothermic reaction2. The chemical chancre among the following is ______ a) Water to clouds b) GroWth of a tree c) Cow dung to bio gas d) Ice to water3. Which is an example of a periodic change?a) Earth quake b) Formation of rainbow c) Occurrence of tides in sea d) Showering of rain4. Photosynthesis by green plant is a a) Physical change b) Chemical change c) Reversible change d) None of the above

Answer»

1. a) Physical change

2. b) GroWth of a tree

3. c) Occurrence of tides in sea

4. b) Chemical change