PDF chapter test TRY NOW
1. James was asked to write some four bases-containing substances. He got \(3\) out of \(4\). Which of the following do you think is wrong?
2. Emma threw a white cloth bag in the washing machine by accident. She kept some China roses in her bag. She took them outside after they had dried and was surprised. There are some green stains on the white fabric. She became confused. Let her out of her muddle. Any of the following factors contributes to the colour green?
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