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प्रश्न
Fill in the blank
Vinegar is the source of ________ acid.
उत्तर
Vinegar is the source of acetic acid.
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संबंधित प्रश्न
Name an indicator which is pink in alkaline solution but turns colourless in acidic solution.
What happens to the H+ ions, of the solution, when an acid is neutralised?
The soil in a field in highly acidic. Name two materials which can be added to this soil to reduce its acidity. Give the reason for your choice.
One of the following is a medicine for indigestion. This is:
(a) sodium hydroxide
(b) manganese hydroxide
(c) magnesium hydroxide
(d) potassium hydroxide
Consider the following substances:
NaCl, Ca(OH)2, NaHCO3, NH3, Na2CO3, H2O, Cl2, CO2, CaSO4.2H2O, 2CaSO4.H2O, CaOCl2
Which compound is used as an antacid?
What do you understand by the strength of an acid? On what factors does the strength of an acid depend?
Fill in the crossword given in Figure 5.2 with the help of the clues provided.
Across
(2) The solution which does not change the colour of either red or blue litmus.
(4) Phenolphthalein gives pink colour in this type of solution.
(7) Colour of blue litmus in lemon juice.
Down
(1) It is used to test whether a substance is acidic or basic.
(3) It is a natural indicator and gives pink colour to the basic solution.
(5) Nature of ant’s sting.
(6) It is responsible for the increase in temperature during a neutralisation reaction.
Complete the following equation.
CaO + H2SO4 → ______ + H2O
Why does blue color copper sulphate become white on heating?
Name the acid present in lemon.
