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Acids, Bases And Salts Test - 4

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Acids, Bases And Salts Test - 4
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  • Question 1
    1 / -0

    If few drops of phenolphthalein indicator are added to lemon juice, then it will show

  • Question 2
    1 / -0

    If few drops of phenolphthalein indicator are added to washing soda solution, then it will show

    Solution

    Washing soda is a base. Phenolphthalein indicator turns pink in basic medium.

     

  • Question 3
    1 / -0

    If tomato juice is pored into a beaker containing methyl orange indicator, it will show

  • Question 4
    1 / -0

    Few drops of methyl orange indicator are added in lemon juice, it will show

    Solution

    Methyl orange is a synthetic indicator, and turns red in acidic medium and yellow in basic medium.

     

  • Question 5
    1 / -0

    According to the Arrhenius concept of acids and bases, which of the following is not a base?

    Solution

    According to the Arrhenius concept of acids and bases, "An acid is a substance which is capable of furnishing H+ ions in the aqueous solution and a base is a substance which is capable of furnishing OH– ions".

    NH3 is not a base by the Arrhenius concept. However, it is a Lewis base (it can donate a pair of electrons) as well as a Bronsted base (it can accept a proton).

     

  • Question 6
    1 / -0

    The strength of an acid is measured by its

    Solution

    Degree of ionization is the fraction of molecules that ionize per mole of the acid.
    Higher the degree of ionization, stronger the acid.

     

  • Question 7
    1 / -0

    Which of the following is the most acidic of all?

    Solution

    Lemon juice is the most acidic out of the given options with a pH value falling between 2 and 3.

     

  • Question 8
    1 / -0

    Which of the following is the most basic of all?

  • Question 9
    1 / -0

    Which of the following will turn blue litmus paper red?

    Solution

    The change in the colour of the litmus paper from red to blue will be seen only with acids.
    Vinegar is the only acid among the given options.

     

  • Question 10
    1 / -0

    A housewife applied soap solution on a turmeric stain on a white shirt, the turmeric stain turned red. Why?

    Solution

    Turmeric is a natural indicator and it turns reddish brown with a base.
    The stain turns red because soap is a base.

     

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