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Q.

Which of the following have maximum pH?

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a

Black coffee

b

Blood

c

Gastric juice

d

Saliva

answer is C.

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Detailed Solution

P^H of black coffee = 5

P^H of blood ranges between = 7.35 to 7.45

P^H of gastric juice ranges between = 1 to 3

P^H of saliva ranges between = 6.2 to 6.7

List of some useful substances with their P^H.

P^H = 0	Battery acid
P^H = 1	Stomach acid
P^H = 2	Lemon juice, Vinegar
P^H = 3	Orange juice, Soda water
P^H = 4	Tomato juice, beer
P^H = 5	Black coffee
P^H = 6	Saliva, Cow milk
P^H = 7	Pure water
P^H = 8	Sea - water
P^H = 9	Baking soda
P^H = 10	Antacids
P^H = 11	Antacids
P^H = 12	Soap water

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