Question

Define a chemical reaction. State four observations which help us to determine that a chemical
eaction has taken place. Write one example of each observation with a balanced chemical equation
[Board Term-I Set-WDCXXOV, 2016] (E​

Answer 1

Answer:

a process that involves formation and rearrangement of substances to form new substances...

1. formation of precipitate
2. evolution of gas
3. change in colour
4. and odour...

Explanation:

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