Three students were given colourless liquids of water, lemon juice and mixture of water and lemon juice After testing these liquids with pH paper a sequence in colour change of pH paper was reported Which is the correct sequence?

Blue, red and green

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Orange, green and green

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Green, red and red

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Colorless, red and green

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Solution

The correct option is C Green, red and red
Water is a neutral liquid and shows the equilibrium as:
$H_{2} O ⇌ H^{+} + {O H}^{-}$
and therefore, shows green color.
Lemon juice has citric acid, therefore turns the litmus paper red in concentrated and dilute solution (water lemon juice).
Therefore, option C is correct.

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Three students were given colourless liquids of water, lemon juice and mixture of water and lemon juice After testing these liquids with pH paper a sequence in colour change of pH paper was reported Which is the correct sequence?

The correct option is C Green, red and redWater is a neutral liquid and shows the equilibrium as:H2O⇌H++OH−and therefore, shows green color.Lemon juice has citric acid, therefore turns the litmus paper red in concentrated and dilute solution (water lemon juice).Therefore, option C is correct.