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प्रश्न
What colours do the following indicators turn when added to an acid (such as hydrochloric acid)?
methyl orange
उत्तर
Methyl orange: Methyl orange changes to red when added to an acid.
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संबंधित प्रश्न
Why does distilled water not conduct electricity, whereas rain water does?
Lime water turns milky when __________ gas is passed through it.
(a) H2
(b) CO
(c) CO2
(d) SO2
While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid?
Which gas is liberated when dilute hydrochloric acid reacts with sodium carbonate?
Explain with an example. Give the chemical equation of the reaction which takes place.
What happens when carbon dioxide gas is passed through lime water for a considerable time ?
Write equations of the reactions involved.
Answer the following question.
Blue litmus solution is added to two test tubes A and B containing dilute HCl and NaOH solution respectively. In which test tube a colour change will be observed? State the colour change and give its reason.
In the experimental set-up to show that "the germinating seeds give out carbon dioxide", answer the following questions:
(i) Why do we keep the conical flask airtight?
(ii) Name the substance kept in the small test tube inside the conical flask. Write its role.
(iii) Why does water rise in the delivery tube?
Which of the following is(are) true when HCl (g) is passed through water?
- It does not ionise in the solution as it is a covalent compound.
- It ionises in the solution
- It gives both hydrogen and hydroxyl ions in the solution
- It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule
- A compound 'A' with a molecular formula of \[\ce{C2H4O2}\] reacts with a base to give salt and water. Identify 'A', state its nature and the name of the functional group it possesses. Write chemical equation for the reaction involved.
- When the above stated compound 'A' reacts with another compound 'B' having molecular formula \[\ce{C2H6O}\] in the presence of an acid, a sweet smelling compound is 'C' formed.
- Identify 'B' and 'C'.
- State the role of acid in this reaction.
- Write chemical equation for the reaction involved.
