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प्रश्न
The pH values of three acids A, B and C having equal molar concentrations are 5.0, 2.8 and 3.5 respectively. Arrange these acids in order of the increasing acid strengths.
उत्तर
Acids have a pH value of less than 7. Lower the pH value, the stronger the acid. Hence, the acids in the increasing order of their strengths are as follows: A < C < B.
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संबंधित प्रश्न
Fresh milk from cows has a pH of 6. So how does the pH change when this milk is turned to curd? Explain your answer.
- Both acids and bases change colour of all indicators.
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- If an indicator changes colour with a base, it does not change colour with an acid.
- Change of colour in an acid and a base depends on the type of the indicator.
Which of these statements are correct?
Fill in the blank in the following sentences:
Those substances whose smell (or odour) changes in acidic or basic solution are called .......................... indicators.
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(a) antibiotic
(b) analgesic
(c) antacid
(d) antiseptic
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(b) have bitter taste
(c) are tasteless
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(b) soda water, pH = 5
(c) sulphuric acid, pH = 2
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Fill in the following blank with suitable words:
Alkalis have a pH.............. than 7.
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