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प्रश्न
What is an olfactory indicator?
उत्तर
Olfactory indicators are those indicators that change their odour when added to an acidic or a basic solution.
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संबंधित प्रश्न
Fill in the blank in the following sentences:
Those substances whose smell (or odour) changes in acidic or basic solution are called .......................... indicators.
The property which is not shown by acids is:
(a) they have sour taste
(b) they feel soapy
(c) they turn litmus red
(d) their pH is less than seven
The property which is common between vinegar and curd is that they:
(a) have sweet taste
(b) have bitter taste
(c) are tasteless
(d) have sour taste
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?
A solution turns phenolphthalein indicator pink. The most likely pH of this solution will be:
(a) 6
(b) 4
(c) 9
(d) 7
Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red
What will be action of solution B on litmus?
Hibiscus flower is an example for natural indicator.
Neutral substances do not bring about any change in colour of indicators.
Write a note on:
Phenolphthalein
