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Is turning litmus paper red from blue a chemical change?
Yes, turning litmus paper red from blue is a chemical change because the color change results from a chemical reaction between the litmus paper and the substance it comes into contact with, indicating a change in the chemical composition of the paper.
Is turning bread into toast a physical or chemical change and why?
It is both. You dry the moisture out of the bread. However, the browning is a chemical change, as the chemical bonds are changed.
Is turning on your fireplace a physical change?
Burning of fuels is a chemical process.
Why is a piece of lemon turning tea cloudy a physical change?
The cloudiness in tea when lemon is added is due to the reaction between the tannins in the tea and the citric acid in the lemon juice. This reaction causes the proteins in the tea to precipitate out of solution, resulting in the cloudiness. It is a physical change because the appearance of the tea is altered, but the chemical composition of the substances remains the same.
Why milk turning into curd is a chemical change?
The process of milk turning into curd is a chemical change because it involves the fermentation of lactose by bacteria present in the curd culture. This fermentation process causes a change in the chemical composition of the milk, leading to the formation of curd through the breakdown of lactose into lactic acid.
