EASY
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What is the colour of the beetroot indicator in the basic solution?

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Important Questions on Role of Substances in Environment

EASY
Science>Chemistry>Role of Substances in Environment>Indicators
A solution turns red litmus blue. Its pH is likely to be
EASY
Science>Chemistry>Role of Substances in Environment>Indicators
Which of the following phenomena occur, when a small amount of acid is added to water?
MEDIUM
Science>Chemistry>Role of Substances in Environment>Indicators
Why does a yellow curry stain on a white shirt turn red when washed with soap?
HARD
Science>Chemistry>Role of Substances in Environment>Indicators
Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and the third is a sugar solution. How will you identify them? You have only turmeric indicator.
MEDIUM
Science>Chemistry>Role of Substances in Environment>Indicators
How does a universal indicator work?
EASY
Science>Chemistry>Role of Substances in Environment>Indicators
Name one natural indicator and one synthetic indicator.
MEDIUM
Science>Chemistry>Role of Substances in Environment>Indicators
What will you observe when methyl orange drop is added to dilute hydrochloric acid?
MEDIUM
Science>Chemistry>Role of Substances in Environment>Indicators
Name the source from which litmus solution is obtained. What is the use of this solution?
MEDIUM
Science>Chemistry>Role of Substances in Environment>Indicators
Define a universal indicator. Mention its one use.
EASY
Science>Chemistry>Role of Substances in Environment>Indicators
Two solutions X and Y are tested with universal indicator. Solution X turns orange whereas solution Y turns red. Which of the solutions is a stronger acid?
MEDIUM
Science>Chemistry>Role of Substances in Environment>Indicators
Is the distilled water acidic/basic/neutral? How would you verify it?
EASY
Science>Chemistry>Role of Substances in Environment>Indicators
A beaker of concentrated hydrochloric acid has a pH of 1. What colour will full range universal indicator turn if it is added to this beaker? Is it a strong or a weak acid?
MEDIUM
Science>Chemistry>Role of Substances in Environment>Indicators
A white shirt has a yellow stain of curry. When soap is rubbed on this shirt during washing, the yellow stain turns reddish-brown. On rinsing the shirt with plenty of water, the reddish-brown stain turns yellow again
Explain the changes in the colour of this indicator which take place during washing and rinsing the shirt.
MEDIUM
Science>Chemistry>Role of Substances in Environment>Indicators
Dorji has a few bottles of soft drink in his restaurant. But, unfortunately, these are not labelled. He has to serve the drinks on the demand of customers. One customer wants acidic drink, another wants basic and third one wants neutral drink. How will Dorji decide which drink is to be served to whom?
HARD
Science>Chemistry>Role of Substances in Environment>Indicators
A shopkeeper has a few bottles of soft drinks in his restaurant which are not labelled. One customer wants acidic drink, another wants basic drink and the third one wants neutral drink. How will the shopkeeper decide which drink is to be served to whom?
EASY
Science>Chemistry>Role of Substances in Environment>Indicators
A solution turns red litmus blue, its pH is likely to be:
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Science>Chemistry>Role of Substances in Environment>Indicators

What is a universal indicator? For what purpose is it used?

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Science>Chemistry>Role of Substances in Environment>Indicators
What will you observe when a drop of phenolphthalein is added to the solution of lime water.
MEDIUM
Science>Chemistry>Role of Substances in Environment>Indicators

What will be the colour produced when a drop of phenolphthalein is added to Sodium nitrate, Copper chloride, Sodium chloride, Sodium acetate.

MEDIUM
Science>Chemistry>Role of Substances in Environment>Indicators
Solution A gives pink colour when a drop of phenolphthalein indicator is added to it. Solution B gives red colour when a drop of methyl orange is added to it. What type of solutions are A and B and which one of the solutions A and B will have a higher pH value?