7th Class Science Acids, Bases and Salts Question Bank Acids, Bases and Salts

  • question_answer Sunidhis teacher asked her to prepare dilute sulphuric acid from concentrated sulphuric acid. What should she do?   

    A)  Add water to the acid            

    B)  Add acid to the water

    C)  Add a base to the concentrated acid

    D)  Add an alkali to the concentrated acid

    Correct Answer: B

    Solution :

    When a concentracted acid is dissolved in water, dilute acid is formed and heat is given out (exothermic reaction). For this reason, it is dangerous to add water to acid. To dilute an acid, always add acid to water slowly with constant stirring.

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