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प्रश्न
From the list given below, select the word(s) required to correctly complete blanks (i) to (v) in the following passage. The words from the list are to be used only once. Write the answers as (a) (i), (ii) (iii) and so on. Do not copy the passage.
A solution M turns blue litmus red, so it must contain _______ ions; another, solution O turns red litmus blue and hence, must contain ______ ions.
Select the word/s given which are required to correctly complete the blanks.
विकल्प
ammonia
ammonium carbonate
carbon dioxide
hydrogen
hydronium
hydroxide
precipitate
salt
water
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उत्तर
A solution M turns blue litmus red, so it must contain hydronium ions; another, solution O turns red litmus blue and hence, must contain hydroxide ions.
Notes
Students should refer to the answer according to their questions.
संबंधित प्रश्न
How is the following salt prepared:
Calcium sulphate from calcium carbonate,
How is the following salt prepared:
Lead (II) oxide from lead.
Give the preparation of the salt shown in the left column by matching with the methods given in the right column. Write a balanced equation for each preparation.
| Salt | Method of preparation |
| Zinc Sulphate | Precipitation |
| Ferrous sulphide | Oxidation |
| Barium Sulphate | Displacement |
| Ferric sulphate | Neutralisation |
| Sodium sulphate | Synthesis |
Explain why It is necessary to find out the ration of reactants required in the preparation of sodium sulphate.
Give equation to prepare the following as directed
MgCO3 from MgCl2
The preparation of lead sulphate from lead carbonate is a two step process (lead sulphate cannot be prepared by adding dilute sulphuric acid to lead carbonate)
What is the first step that is required to prepare lead sulphate from lead carbonate?
Give the equation for the preparation of the following salt from the starting material given.
Potassium sulphate from potassium hydroxide solution
Give the equation for the preparation of the following salt from the starting material given.
Lead chloride from lead carbonate (two equations)
From the list given below, which one is:
[SO2, SiO2, Al2O3, CO, MgO, Na2O]
- A covalent oxide of a metalloid.
- An oxide which when dissolved in water form acid.
- A basic oxide.
- An amphoteric oxide.
You are provided with the following chemicals:
NaOH, Na2CO3, H2O, Zn(OH)2, CO2, HCI, Fe, H2SO4, CI2, Zn.
Using the suitable chemicals from the given list only, state briefly how you would prepare iron (II) sulphate.
