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प्रश्न
Hibiscus flower is an example for natural indicator.
विकल्प
True
False
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उत्तर
Hibiscus flower is an example for natural indicator- True.
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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.
- If an indicator gives a colour change with an acid, it does not give a change with a base.
- 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?
The more alkaline a solution, the ______ the pH.
Explain the pH change as the cause of tooth decay.
The pH values of six solutions A to F are given below:
A = 0, B = 11, C = 6, D = 3, E = 13, F = 8
Which of the above solutions are
- acids
- alkalis?
Which of the following elements would form oxides which would indicate pH values less than seven, using moist pH paper?
Magnesium, Carbon, Sulphur, Hydrogen, Copper
What damage could be caused while the pH in a person’s mouth is low?
Which one of the following can be used as an acid- base indicator by a visually impared student?
Turmeric and litmus are ______ acid-base indicators.
Assertion: Methyl orange and phenolphthalein are natural indicators.
Reason: Methyl orange is yellow in colour while phenolphthalein is pink.
