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प्रश्न
Fill in the following blank with suitable words:
Acids have a pH...........than 7.
उत्तर
Acids have a pH less than 7.
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संबंधित प्रश्न
What colour do the following indicators turn when added to a base or alkali (such as sodium hydroxide)?
litmus
Fill in the blank in the following sentences:
Acids have a ..........................taste and they turn..........................litmus to..........................
Which of the following types of medicine is used for treating indigestion caused by over-eating?
(a) antibiotic
(b) analgesic
(c) antacid
(d) antiseptic
Why does tooth decay start when the pH of mouth is lower than 5.5?
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.
Under what soil conditions do you think a farmer would treat the soil of his fields with quicklime (calcium oxide), or slaked lime (calcium hydroxide) or chalk (calcium carbonate)?
What do you think will be the pH in the stomach of a person suffering from indigestion: less than 7 or more than 7?
How does an antacid work?
Methyl orange gives ______ colour in an acidic solution.
Assertion: Methyl orange and phenolphthalein are natural indicators.
Reason: Methyl orange is yellow in colour while phenolphthalein is pink.
