Question
What is the role of natural indicators in identifying acidic and basic substances?
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Column $I$
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Column $II$
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$(i)$
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Right ventricle
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$(a)$
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Pushes blood into the pulmonary artery.
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$(ii)$
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Pulmonary veins
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$(b)$
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Take deoxygenated blood from the heart to lungs.
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$(iii)$
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Left atrium
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$(c)$
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Receives blood from different parts of the body.
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$(iv)$
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Pulmonary arteries
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$(d)$
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Bring oxygenated blood from lungs to the heart.
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$(v)$
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Left ventricle
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$(e)$
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Pushes blood into the aorta.
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vi)$
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Right auricle
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$(f)$
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Receives deoxygenated blood from the pulmonary veins.
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Column $I$
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Column $I$
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$(a)$
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Yeast
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$(i)$
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Earthworm
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$(b)$
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Diaphragm
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$(ii)$
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Gills
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$(c)$
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Skin
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$(iii)$
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Alcohol
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$(d)$
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Leaves
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$(iv)$
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Chest cavity
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$(e)$
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Fish
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$(v)$
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Stomata
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$(f)$
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Frog
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$(vi)$
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Lungs and skin
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$(vii)$
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Tracheae
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| Column I | Column II |
| A plane mirror | Used as a magnifying glass. |
| A convex mirror | Can form image of objects spread over a large area. |
| A convex lens | Used by dentists to see enlarged image of teeth. |
| A concave mirror | The image is always inverted and magnified. |
| A concave lens | The image is erect and of the same size as the object. |
| The image is erect and smaller in size than the object |