Chemistry
Grade-10
Easy
Question
What does pH measure?
- The amount of hydrogen (H+) ions
- The amount of hydroxide (OH-) ions
- Amount of water
- Reactivity of substance
Hint:
It measures the amount of hydrogen and hydroxyl ions in water.
The correct answer is: The amount of hydrogen (H+) ions
- The pH scale is a measure that is used to determine how acidic or basic water is in nature. The range starts from 0 to 14, with 7 representing neutrality.
- Acidity is indicated by pH values below 7, whereas baseness is shown by pH values above 7.
- In reality, pH is a measurement of the proportion of free hydrogen and hydroxyl ions in water. While water that contains more free hydroxyl ions is basic, water with more free hydrogen ions is acidic.
- Since chemicals in the water can change pH, pH is a crucial sign that the chemical composition of the water is changing. "Logarithmic units" are used to report pH. Ten times more acidic is water with a pH of five than water with a pH of six.
Related Questions to study
Chemistry
An indicator paper is prepared by dipping paper strips in solution (P). When this strip of indicator is added to the solution (Q), which contains less H+ ions than the OH- ions, the color of the paper strip turns pink. Identify the solution (P).
An indicator paper is prepared by dipping paper strips in solution (P). When this strip of indicator is added to the solution (Q), which contains less H+ ions than the OH- ions, the color of the paper strip turns pink. Identify the solution (P).
ChemistryGrade-10
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Which of the following is correctly matched?
| Indicators |
Acid |
| (a) Litmus |
Blue |
| (b) China rose |
Orange |
| (c) Methyl orange |
Red |
| (d) Red Cabbage |
Red |
Which of the following is correctly matched?
| Indicators |
Acid |
| (a) Litmus |
Blue |
| (b) China rose |
Orange |
| (c) Methyl orange |
Red |
| (d) Red Cabbage |
Red |
ChemistryGrade-10
Chemistry
A substance (X) is added to the lime solution and then mixed with red cabbage solution. The resultant solution turns out violet in color. What will be the nature of substance (X)?
A substance (X) is added to the lime solution and then mixed with red cabbage solution. The resultant solution turns out violet in color. What will be the nature of substance (X)?
ChemistryGrade-10
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A China rose indicator, when added to a sample solution, its color changes to green. What will be the nature of this sample?
A China rose indicator, when added to a sample solution, its color changes to green. What will be the nature of this sample?
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Red cabbage is a natural indicator. When it is added to the basic solution, the color changes from:
Red cabbage is a natural indicator. When it is added to the basic solution, the color changes from:
ChemistryGrade-10
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What is the color of red cabbage as an indicator?
What is the color of red cabbage as an indicator?
ChemistryGrade-10
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The following figure shows the color changes in the test tubes A, B and C after adding indicator China rose.
Identify the solution present in test tubes A, B and C, respectively?
The following figure shows the color changes in the test tubes A, B and C after adding indicator China rose.
Identify the solution present in test tubes A, B and C, respectively?
ChemistryGrade-10
Chemistry
Which of the pigment found in the red cabbage changes color when acid or base is added to it?
Which of the pigment found in the red cabbage changes color when acid or base is added to it?
ChemistryGrade-10
Chemistry
The indicators which remain yellow when added to the base and become red in color when added to acid is:
The indicators which remain yellow when added to the base and become red in color when added to acid is:
ChemistryGrade-10
Chemistry
The indicator which is prepared from man-made substances in the lab are called:
The indicator which is prepared from man-made substances in the lab are called:
ChemistryGrade-10
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Based on the following picture, what will change the color of blue litmus paper to a red one?
Based on the following picture, what will change the color of blue litmus paper to a red one?
ChemistryGrade-10
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A sample solution is present in the container (X). A filter paper is dipped inside this solution and then the lime solution. After dipping in the lime water, the color of the filter paper changes to reddish-brown. What will be the sample solution present in container (X)?
A sample solution is present in the container (X). A filter paper is dipped inside this solution and then the lime solution. After dipping in the lime water, the color of the filter paper changes to reddish-brown. What will be the sample solution present in container (X)?
ChemistryGrade-10
Chemistry
A neutral solution turns a blue litmus paper into:
A neutral solution turns a blue litmus paper into:
ChemistryGrade-10
Chemistry
When turmeric is added to the hydrochloric acid solution, what change will occur here?
When turmeric is added to the hydrochloric acid solution, what change will occur here?
ChemistryGrade-10
Chemistry
Substances like dark chocolate that have a bitter taste, usually indicates that it would be classified as a
Substances like dark chocolate that have a bitter taste, usually indicates that it would be classified as a
ChemistryGrade-10
