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    Chemistry
    Grade-10
    Easy

    Question

    What do you mean by acid?

    1. Substances that react with a base to give salt.
    2. A substance that furnishes H+ ions in the water.
    3. A substance that tastes sour.
    4. All of these.

    hintHint:

    Acids have pH lower than 7. Orange juice is acidic.

    The correct answer is: All of these.

      An acid is a chemical species that donates protons or hydrogen ions and/or accepts electrons. Most acids contain a hydrogen atom bonded that can release (dissociate) to yield a cation and an anion in water. The higher the concentration of hydrogen ions produced by an acid, the higher its acidity and the lower the pH of the solution.

      Acids reacts with bases to give salt and water. They taste sour.

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