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Acids, Bases And Salts Test - 6

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Acids, Bases And Salts Test - 6
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Weekly Quiz Competition
  • Question 1
    1 / -0
    If litmus paper is dipped in a solution of sodium hydroxide it will turn
    Solution
    Sodium hydroxide is a base which will turn red litmus blue.
  • Question 2
    1 / -0
    Directions: Fill in the given blanks.

    The taste of _______ will be sour and that of _______ will be bitter.
    Solution
    CH3COOH have a sour taste while NH4OH have a bitter taste. CH3COOH is responsible for giving sour taste to vinegar.
    Important: This situation is hypothetical and acids and bases should never be tested by tasting them.
    Strong acids and alkalies are highly corrosive.
  • Question 3
    1 / -0
    Which of the following base when taken in equal concentrations will produce the largest number of OH- ions in the solution?
    Solution
    NaOH among the given options is the strongest electrolyte and hence, it is the strongest base and will furnish the largest number of OH- ions.
  • Question 4
    1 / -0
    Which of the following is an example of an alkali?
  • Question 5
    1 / -0
    Which of the following similarities do H2SO4 and NH4OH have between themselves?
    Solution
    All acids and bases are electrolytes and dissociate into ions in their aqueous solutions.
    However, the ions furnished by them will be different according to their constitution.
  • Question 6
    1 / -0
    Which of the following electrolytes will fully ionize in a dilute aqueous solution to give free ions?
  • Question 7
    1 / -0
    In which of the following solutions, phenolphthalein indicator will give a pink colour?
    Solution
    On addition to bases phenolphthalein indicator turns to pink colour.
  • Question 8
    1 / -0
    A bottle labelled NaCN will contain
  • Question 9
    1 / -0
    A solution of NaCl will not contain
    Solution
    NaCl is an ionic compound and is constituted by ions which arrange themselves to form a 3-dimensional lattice.
    Therefore, NaCl does not exist as molecules.
  • Question 10
    1 / -0
    Which of the following is an ionisation reaction?
  • Question 11
    1 / -0
    If few drops of phenolphthalein indicator are added to lemon juice, then it will show
  • Question 12
    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 13
    1 / -0
    If tomato juice is pored into a beaker containing methyl orange indicator, it will show
  • Question 14
    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 15
    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 16
    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 17
    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 18
    1 / -0
    Which of the following is the most basic of all?
  • Question 19
    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 20
    1 / -0
    A turmeric stain on a white shirt turns red when rubbed with soap because
    Solution
    Turmeric is a natural indicator and it turns reddish brown with a base.
    The stain turns red because soap is a base. [1]
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