True or False questions
• Please answer the following questions
1. Water is released from plants & animals
False
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2.
Water contains 2 atoms or oxygen
3.
Water is found in plants but not in meats
4.
Water can dissolve many substances

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

it is the most commonly accepted one

it takes on an electronical energy

answeridentity;