Fill in the table with the names of the natural acids found in each of the food items. Food item Acid found in the food item Spinach Orange Vinegar tamarind curd

Spinach contains oxalic acid which is an organic acid. Orange contains citric acid due to which it tastes sour. Vinegar contains acetic acid and water. Tamarind contains tartaric acid along with sugar, vitamin B, and calcium. Curd contains lactic acid due to the presence of lactobacillus bacteria. Food item Acid found in the food item Spinach Oxalic acid Orange Citric acid Vinegar Acetic acid tamarind Tartaric acid curd Lactic acid

Match the following: (i) window cleaning liquid (a) potassium hydroxide (ii) Milk of Magnesia (b) calcium hydroxide (iii) soap (c) sodium bicarbonate (iv) lime water (d) ammonium hydroxide (v) baking soda (e) magnesium hydroxide

Ammonium hydroxide is also called ammonia solution. A dilute solution of ammonium hydroxide is used as a window cleaning liquid and also in the manufacture of fertilizers. Milk of magnesia is a brand name for magnesium hydroxide. It is widely used as an antacid to neutralize acidity in the stomach. Soap consists of water-soluble sodium or potassium salts of long chai n fatty acids. P otassium hydroxide is used in the manufacture of fertilizers and soft soaps. Lime water is the common name for calcium hydroxide. It is also known as 'slaked lime'. Baking soda, also known as sodium bicarbonate , is widely used in baking. It is a salt composed of a sodium cation and a bicarbonate anion. (i) window cleaning liquid (d) ammonium hydroxide (ii) Milk of Magnesia (e) magnesium hydroxide (iii) soap (a) potassium hydroxide (iv) lime water (b) calcium hydroxide (v) baking soda (c) sodium bicarbonate

E M B I B E

CONCERT Science 7>Chapter 5 - Acids, Bases and Salts>STEP IN>Q 1

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7th CBSE

IMPORTANT

Earn 100

Bases often taste bitter.

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Important Questions on Acids, Bases and Salts

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7th CBSE

IMPORTANT

CONCERT Science 7>Chapter 5 - Acids, Bases and Salts>STEP IN>Q 2

Fill in the table with the names of the natural acids found in each of the food items.

Food item	Acid found in the food item
Spinach
Orange
Vinegar
tamarind
curd

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7th CBSE

IMPORTANT

CONCERT Science 7>Chapter 5 - Acids, Bases and Salts>STEP IN>Q 2

Name a naturally occurring acid that is found in ants?

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CONCERT Science 7>Chapter 5 - Acids, Bases and Salts>STEP IN>Q 2

Why is formic acid of concern to us?

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7th CBSE

IMPORTANT

CONCERT Science 7>Chapter 5 - Acids, Bases and Salts>STEP IN>Q 3

Match the following:

(i)	window cleaning liquid	(a)	potassium hydroxide
(ii)	Milk of Magnesia	(b)	calcium hydroxide
(iii)	soap	(c)	sodium bicarbonate
(iv)	lime water	(d)	ammonium hydroxide
(v)	baking soda	(e)	magnesium hydroxide