Question

Which of the following gas changes the limewater into milky?
A) Carbon dioxide B) Nitrogen
C) Oxygen
D) All the above
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During inspiration air passes into lungs due to :
A) increased volume of thoracic cavity
B) fall in pressure inside the lungs
increase in the volume of thoracic cavity and fall in lung pressure
D) muscular expansion of lungs
Roots respire through:
A) Spiracles
B) Lenticels
C) Stomata
D) Air spaces
Which of the following animals breathe through their skin and lungs?
A) Fish
B) Frog
C) Snake
D) Earthworm
What happens to limewater, when we exhale air into it?
A) Remains same B) Tums blue
C) Turns milky
D) Becomes colourless
Plants respire through:
.)
A) Cells
B) Stomata
C) Gills
D) Cell membrane
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Answer 1

A) Spiracles

Explanation:

) Gills.............

Answer 2

When carbon dioxide is passed through lime water for a short time,it turns lime water milky due to formation of a white precipitate of calcium carbonate.

When carbon dioxide is passed through lime water for a short time,it turns lime water milky due to formation of a white precipitate of calcium carbonate.Exhaled air contains less oxygen and more carbon dioxide.

When carbon dioxide is passed through lime water for a short time,it turns lime water milky due to formation of a white precipitate of calcium carbonate.Exhaled air contains less oxygen and more carbon dioxide.The carbon dioxide present in exhaled air turns lime water milky.

When carbon dioxide is passed through lime water for a short time,it turns lime water milky due to formation of a white precipitate of calcium carbonate.Exhaled air contains less oxygen and more carbon dioxide.The carbon dioxide present in exhaled air turns lime water milky.So the correct answer is 'Carbon dioxide'.

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