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प्रश्न
Give one example of a salt which gives an aqueous solution having:
pH more than 7
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उत्तर
Sodium carbonate (Na2CO3.10H2O)
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संबंधित प्रश्न
The salt prepared by the method of direct combination is _______.
How is common salt obtained from sea-water?
Give any two uses of common salt (sodium chloride).
Common salt is obtained from sea-water by the process of ______.
Complete and balance the following chemical equation:
\[\ce{NaCl + NH3 + H2O + CO2 ->}\]
What happens when copper sulphate crystals are heated strongly? Explain with the help of an equation.
Explain why chlorine is used for sterilising drinking water supply.
What is meant by ‘a family of salts’? Explain with examples.
The aqueous solution of one of the following salts will turn phenolphthalein indicator pink. This salt is:
Which of the following salts will give an aqueous solution having pH of almost 7?
Consider the following salts:
Na2CO3, NaCl, NH4Cl, CH3COONa, K2SO4, (NH)2SO4
Which of these salts will give:
- acidic solutions?
- neutral solutions?
- basic solutions (or alkaline solutions)?
How many molecules of water of crystallisation (per formula unit) are present in:
Copper sulphate crystals
State one observation for each of the following :
Lead nitric is heated strongly in a test tube.
The pH values of three solutions A, B and C are given in the table. Answer the following questions:
| Solution | pH value |
| A | 12 |
| B | 2 |
| C | 7 |
- Which solution will have no effect on litmus solution?
- Which solution will liberate CO2 when reacted with sodium carbonate?
- Which solution will turn red litmus solution blue?
Give four substances which contain water of crystallization and write their common name.
Outline the steps required to convert hydrogen chloride to anhydrous iron (III) chloride. Write the equations for the reactions.
Name a colourless gas which bleaches.
What are hygroscopic substances?
You are provided with the list of chemicals mentioned below in the box:
| Sodium hydroxide solution, copper carbonate, zinc, hydrochloric acid, copper, dilute sulphuric acid, chlorine, iron |
Using suitable chemicals from the list given, write a balanced chemical equation for the preparation of the salt mentioned below:
Ferric chloride
