Class10 scince notes
Acids Bases
Sour in taste
Derived from Greek word' ACIDUS'
Bitter in taste
Changes blue litmus into red Changes red litmus into blue
e.g. Hydrochloric acid HCl e.g. Sodium hydroxide NaOH
Sulphuric acid Potassium hydroxide KOH
Nitric acid Calcium hydroxide
Acetic acid Ammonium hydroxide
Some naturally occurring acids
Vinegar Acetic Acid
Orange Citric Acid
Lemon Citric Acid
Tamarind Tartaric Acid
Tomato Oxalic Acid
Sour milk (Curd) Lactic Acid
Ant and Nettle sting Methanoic Ac
Acid – Base Indicator:Substances which indicate the presence of an acid or base in a
solution.
Litmus solution – It is a natural indicator. It is a purple dye extracted from Lichens.
Other examples are Red Cabbage and coloured petals of Petunia and turmeric.
Olfactory indicators : Show odour changes in acidic or basic media. E.g. onion and
Sour in taste
Derived from Greek word' ACIDUS'
Bitter in taste
Changes blue litmus into red Changes red litmus into blue
e.g. Hydrochloric acid HCl e.g. Sodium hydroxide NaOH
Sulphuric acid Potassium hydroxide KOH
Nitric acid Calcium hydroxide
Acetic acid Ammonium hydroxide
Some naturally occurring acids
Vinegar Acetic Acid
Orange Citric Acid
Lemon Citric Acid
Tamarind Tartaric Acid
Tomato Oxalic Acid
Sour milk (Curd) Lactic Acid
Ant and Nettle sting Methanoic Ac
Acid – Base Indicator:Substances which indicate the presence of an acid or base in a
solution.
Litmus solution – It is a natural indicator. It is a purple dye extracted from Lichens.
Other examples are Red Cabbage and coloured petals of Petunia and turmeric.
Olfactory indicators : Show odour changes in acidic or basic media. E.g. onion and
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