MEDIUM
Earn 100

The yellow colour of turmeric changes to red on addition of soap solution. When substance P is added to turmeric, there is no change in colour.

Which of the following is definitely true about substance P?

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Important Questions on Acids, Bases and Salts

EASY
The indicators which turn red in acid solution are:
EASY
What happens, when methyl orange solution mixed with HCl?
MEDIUM

You are provided with aqueous solutions of three salts A, B and C23 drops of blue litmus solution, red litmus solution and phenolphthalein were added to each of these solutions in separate experiments. The change in colour of different indicators were recorded in the following table:

Sample  With blue litmus solution   With red litmus solution    With phenolphthelein
     A            No change            Turns blue          Turns pink
     B            No change            No change          No change
    C            Turns red            No change          No change

On the basis of above observations, identify A, B and C from the following options:

HARD

The salt solution which does not react with ammonium hydroxide is:

MEDIUM

Which of the following is not an olfactory indicator?

MEDIUM
A solution turns methyl orange into yellow the approximate pH of solution is
MEDIUM
The colour of Methyl orange in alkali solutions is _____ .
EASY

An indicator is added to Potassium Hydroxide and the solution turns pink:

Name the indicator that is added.

MEDIUM
Which of the following is a dibasic acid?
EASY
Hydrochloric acid solution affects ______ litmus paper.
EASY
Methyl orange is a _____ indicator.
MEDIUM
Why does a yellow curry stain on a white shirt turn red when washed with soap?
MEDIUM
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?
EASY
A substance is sour in taste, not soapy to touch and has no effect on yellow turmeric solution. It will affect _____ litmus paper.
MEDIUM
What is an indicator? Name three indicators.
EASY

Turmeric is an example of a _____ indicator 

(Blue, natural, neutral, indicators, lichens)

MEDIUM
Litmus is a dye which is extracted from _____.
(Blue, natural, neutral, indicators, lichens)
HARD
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
Is the distilled water acidic/basic/neutral? How would you verify it?