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प्रश्न
Identify the following solutions, whether they are acid or base.
| Solution | Change in Indicator | Acid/Base | ||
| Litmus | Phenolphthalein | Methyl orange | ||
| 1. | -- | No change | -- | |
| 2. | -- | -- | Orange colour turns red | |
| 3. | Red litmus turns blue | -- | -- | |
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उत्तर
| Solution | Change in Indicator | Acid/Base | ||
| Litmus | Phenolphthalein | Methyl orange | ||
| 1. | Blue litmus turns red | No change | The orange colour turns red | Acid |
| 2. | Blue litmus turns red | No change | Orange colour turns red | Acid |
| 3. | Red litmus turns blue | Colourless to pink | The orange colour turns yellow | Base |
संबंधित प्रश्न
Name an indicator which is pink in alkaline solution but turns colourless in acidic solution.
Out of HCl and CH3COOH, which one is a weak acid and why? Describe an activity to support your answer.
Name the particles present in :
Weak electrolyte
If iron reacts with dilute sulphuric acid, what will be the products?
Choosing the correct words given in brackets, complete the sentence given below:
A(n) ______ (acid/basic) salt is one in which the hydrogen of an acid has been partially replaced by a ______ (metal/non-metal).
Solution A is strong acid B weak acid C strong alkali.
Which solution contains solute molecules in addition to water molecules?
HCl, HNO3, C2H5OH, C6H12O6 all contain H atoms but only HCl and HNO3 show acidic character. Why?
Complete the following table and write one equation for each to justify the statement:
|
Reactants |
Products |
Method |
|
Soluble base + Acid (dil) |
Salt + water |
Neutralisation Titration |
|
Metal + Non-metal |
Salt (soluble/insoluble) |
______ |
|
Insoluble base + ______ |
Salt (soluble) + water |
______ |
|
Active metal + Acid (dil) |
______ + ______ |
______ |
|
Soluble salt solution (A) + Soluble salt solution (B) |
Precipitated salt + Soluble salt |
______ |
|
Carbonate/bicarbonate + Acid (dil) |
Salt + ______ + ______ |
Decomposition of carbonate |
|
Chlorides/nitrates + Acid (conc.) |
______ + ______ |
Decomposition of chlorides and nitrates |
______ acids have a relatively smaller amount of acids dissolved in a solvent.
Complete the following equation.
Zn + ______ → Na2ZnO2 + H2 ↑
