The pH is defined as
logarithm of hydroxide ion concentration
negative logarithm of hydrogen ion concentration.
negative logarithm of hydroxide ion concentration
only hydrogen ion concentration
29 practice sets · Page 1 of 2
The pH is defined as
logarithm of hydroxide ion concentration
negative logarithm of hydrogen ion concentration.
negative logarithm of hydroxide ion concentration
only hydrogen ion concentration
Which one of the following solutions woulditmus you use to test the pH of a given sample?
Blue litmus solution
Red litmus solution
Universal indicator solution
Mixture of red and blue litmus solution
Which one of the following is not required to find the pH of a solution?
pH paper
litmus paper
Universal indicator
Standard ph value chart
the ph range of a universal indicator solution is
3 to 14
0 to 14
11 to 14
0 to 11
The pH of a solution is 10. If water is added to it, its pH will
Remains same
Increases
Decreases
Becomes 7
The correct method of finding the pH of a solution is to
heat the solution in a test tube and expose the ph paper to the vapours formed
pour few drops of the solution from the test tube on the ph paper
drop the ph paper in the solution
put a drop of the solution on the ph paper using a dropper
The colour of the pH paper strip turned red when it was dipped into a solution. the solution colud be
dilute sodium bicarbonate solution
tap water
dilute sodium hydroxide solution
dilute hydrochloric acid
Th two colours seen at the extreme end of the ph chart are
red, blue
red, green
green, blue
orange, green
Solid sodium bicarbonate was placed on a strip of pH paper. The colour of the strip
turned blue
did not change
turned green and suddenly yellow
turned light pink
ph value of lime water is
7
more than 7
less than 7
zero
pH paper is prepared by dipping the strip into
Universal indicator
Blue litmus
Red litmus
Phenolphthalein
ph of a neutral solution
is more than 7
is less than 7
is 7
none of these
On putting two drops of dilute hydrochloric acid on the pH paper, the colour developed on the pH paper is
red
green
blue
violet
In an acid solution, the pH is
greater than p(OH)
less than p(OH)
equal to p(OH)
none of these
If the ph of a solution is 7.5, its nature is
strongly acidic
weakly acidic
basic
neutral
Bottle A contains oxalic acid and bottle B contains sodium carbonate solution. When pH paper is dipped in each of the solutions, the colour seen in A and B respectively will be
blue, orange
green, blue
orange, green
orange, blue
As the ph increases
basic strength increases
basic strength decreases
none of these
acidic strength increases
A student tested the pH of distilled water using paper and observed green colour. After adding a few drops of dilute solution, the pH was tested again. The colour change now observed would be
green
red
orange
blue
A student tested the ph of distilled water and found that the colour of the ph paper changed it to green. He checked the ph again after dissolving common salt in it. the color of the ph paper this time is
yellow
red
blue
green
A student observed that the colour of pH paper changes to green when she dipped it in water. She added a few drops of concentrated hydrochloric acid to the water. The colour of pH paper would turn to
apple green
dark blue
lemon yellow
light red