Class7_Science_Acids, Bases and Salts_Indicators

Many substances that you encounter in your daily life have different properties. One major
difference between substances is whether they are acidic or basic. There are special substances
that are used to test whether something is acidic or basic. These substances are called

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Why is it so important to dress appropriately for the wedding feast? How can you help others know that God has invited them to be part of His wedding feast one day?

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