pH and Its Measurement
Chemistry ⇒ Acids, Bases, and Salts
pH and Its Measurement starts at 9 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in pH and Its Measurement.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 9
A solution has a pH of 1. Is it a strong acid, weak acid, strong base, or weak base?
A solution has a pH of 3. Is it acidic, basic, or neutral?
A student adds a few drops of universal indicator to a solution and observes a green color. What is the approximate pH of the solution?
A student measures the pH of rainwater and finds it to be 5.6. Is the rainwater acidic, basic, or neutral?
A student adds a few drops of universal indicator to a solution and observes a green color. What is the approximate pH of the solution?
A student measures the pH of rainwater and finds it to be 5.6. Is the rainwater acidic, basic, or neutral?
A student tests a solution with red litmus paper and it remains red. What does this indicate about the solution?
A laboratory technician accidentally mixes equal volumes of a solution with pH 2 and a solution with pH 12. What is the expected pH of the resulting mixture? Explain your reasoning.
Which indicator gives a range of colors to estimate pH more precisely than litmus paper?
(1) Universal indicator
(2) Methyl orange
(3) Phenolphthalein
(4) Red cabbage extract
Which instrument is commonly used to measure the pH of a solution?
(1) Thermometer
(2) pH meter
(3) Barometer
(4) Voltmeter
Which of the following household substances is most likely to have a pH above 7?
(1) Vinegar
(2) Lemon juice
(3) Baking soda solution
(4) Orange juice
Which of the following is NOT a method to measure pH?
(1) pH meter
(2) Litmus paper
(3) Universal indicator
(4) Thermometer
Fill in the blank: A solution with a pH of 10 is ______ times more basic than a solution with a pH of 8.
Fill in the blank: A solution with a pH of 2 is ______ times more acidic than a solution with a pH of 4.
Fill in the blank: The lower the pH value, the ______ the acidity of the solution.
Litmus paper turns ______ in acidic solutions and ______ in basic solutions.
True or False: A pH value less than 7 always indicates a basic solution.
True or False: A solution with a pH of 9 is basic.
True or False: Distilled water always has a pH of exactly 7.
True or False: The pH of a solution can be affected by temperature.
