Advertisements
Advertisements
प्रश्न
Lime water turns milky when __________ gas is passed through it.
(a) H2
(b) CO
(c) CO2
(d) SO2
APPEARS IN
संबंधित प्रश्न
Why does distilled water not conduct electricity, whereas rain water does?
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
What colour do the following indicators turn when added to a base or alkali (such as sodium hydroxide)?
red cabbage extract
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?
What happens when carbon dioxide gas is passed through lime water for a short time?
Write equations of the reactions involved.
What is meant by strong bases and weak bases? Classify the following into strong bases and weak bases:
NH4OH, Ca(OH)2, NaOH, KOH, Mg(OH)2
What happens when carbon dioxide gas is passed through lime water for a considerable time ?
Write equations of the reactions involved.
Write the main difference between an acid and a base.
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 phenomena occur when a small amount of acid is added to water?
- Ionisation
- Neutralisation
- Dilution
- Salt formation
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
Identify the correct representation of reaction occurring during chloralkali process
- 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.
