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प्रश्न
You have been provided with three test-bubes. One of these test-tubes contains distilled water and the other two contain an acidic and a basic solution respectively. If you are given only blue litmus paper, how will you identify the contents of each test-tube?
उत्तर
We have been provided with three test tubes, containing distilled water, an acidic solution and a basic solution. The test tube containing distilled water will not bring about any change in the colour of the blue litmus paper. Now, when you dip the same litmus paper in the test tube containing the acidic solution, it will turn the blue colour of the litmus paper to red. The basic solution in the third test tube will have no effect on blue litmus paper but will revert back the colour of litmus paper to blue which was earlier turned red by the acidic solution.
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संबंधित प्रश्न
While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid?
Compounds such as alcohols and glucose also contain hydrogen but are not categorized as acids. Describe an activity to prove it.
Why do acids not show acidic behaviour in the absence of water?
What colour do the following indicators turn when added to a base or alkali (such as sodium hydroxide)?
(a) methyl orange
Fill in the blank in the following sentences:
Acids produce.......................... ions on dissolving in water.
While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid?
What happens when dilute hydrochloric acid is added to sodium carbonate? Write a balanced chemical equation of the reaction involved.
Write the main difference between an acid and a base.
Choose the correct option from given alternative:
When a small amount of acid is added to water, the phenomena which occur are:
(A) Dilution
(B) Neutralization
(C) Formation of H3O+ ions
(D) Salt formation
A metal carbonate X on reacting with an acid gives a gas which when passed through a solution Y gives the carbonate back. On the other hand, a gas G that is obtained at anode during electrolysis of brine is passed on dry Y, It gives a compound Z, used for disinfecting drinking water. Identity X, Y, G and Z.
