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Which one of the following is the weakest acid?

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Important Questions on Acids, Bases and Salts

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Conjugate acid-base pair is
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Select the mineral acid from the following 
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Select the organic acid from the following:
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Give the appropriate term defined by the statement given below:

The substance that releases hydronium ion as the only positive ion when dissolved in water

MEDIUM
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Write any three functions of HCl secreted in the stomach.
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Which of the following is a Bronsted-Lowry acid ?
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Which acid is present in tomato?
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Science>Chemistry>Acids, Bases and Salts>Acids
The indicators which turn red in acid solution are:
MEDIUM
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Write the function of HCl secreted in the stomach.
MEDIUM
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Attempt the following:
Food is broken down in the alimentary canal into smaller molecules:
(a) What is the importance of HCl in the stomach of man?
(b) What is the role of Bile Salts in the Emulsification of Fats?
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Name the element which is common to all acids? 
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 Give any two uses of ethanoic acid.
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Assertion: The amphoteric behaviour of water is explained by Lewis acid base theory

Reason: water acts as acid with NH3 and base with H2S

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Identify the solid acid at room temperature.
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The salt solution which does not react with ammonium hydroxide is:

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Which of these can be olfactory indicator?
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Which of the following indicators is not an acid- base indicator?
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Science>Chemistry>Acids, Bases and Salts>Acids
One of the following is not an organic acid.This is 
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Name two natural sources of acid and base.
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Science>Chemistry>Acids, Bases and Salts>Acids
Which of the following is a dibasic acid?