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प्रश्न
Fill in the blank in the following sentences:
Those substances whose smell (or odour) changes in acidic or basic solution are called .......................... indicators.
उत्तर
Those substances whose smell (or odour) changes in acidic or basic solution are called olfactory indicators.
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संबंधित प्रश्न
Sodium hydroxide turns blue litmus red.
Indicator is a substance which shows different colours in acidic and basic solutions.
Name the scientist who developed the pH scale.
Fresh milk has a pH of 6. When it changes into curd (yogurt), will its pH value increase or decrease? Why?
Water is a neutral substance. What colour will you get when you add a few drops of universal indicator to a test-tube containing water?
What effect does the concentration of OH− ions have on the nature of a solution?
Fresh milk has a pH of 6. When milk changes into curd, the pH value will:
(a) become 7
(b) become less than 6
(c) become more than 7
(d) remain unchanged
Which of the following elements would from oxides which would indicate pH values less than seven, using moist pH paper?
Magnesium, Carbon, Sulphur, Hydrogen, Copper
Turmeric is used as a _______.
Assertion: Methyl orange and phenolphthalein are natural indicators.
Reason: Methyl orange is yellow in colour while phenolphthalein is pink.
