Advertisements
Advertisements
प्रश्न
Give equation to prepare the following as directed
NaHCO3 from Na2CO3
उत्तर
\[\ce{Na2CO3 + CO2 + H2O -> 2NaHCO3}\]
APPEARS IN
संबंधित प्रश्न
Write a balanced chemical equation for the following:
Preparation of methane from iodomethane.
How is the following salt prepared:
Lead (II) oxide from lead.
Write the balanced equation for the preparation of the following compounds, starting from iron and other substance:
Iron (II) sulphide
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.
Fill in the blanks with suitable words:
An acid is a compound which when dissolved in water forms hydronium ions as the only ______ ions. A base is a compound which is soluble in water and contains ______ ions. A base reacts with an acid to form a ______ and water only. This type of reaction is known as ______.
Choose the most appropriate answer from
(SO2, SiO2, Al2O3, CO, MgO, Na2O)
A covalent oxide of a metalloid.
Match the salts underlined in Column A with the most suitable method of preparation given in Column B.
| Column A | Column B | ||
| (a) | \[\ce{ZnCl2 \text{from} Zn}\] | 1. | Precipitation |
| (b) | \[\ce{KNO3 \text{from} KOH}\]. | 2. | Direct combination |
| (c) | \[\ce{CaCO3 \text{from} CaCl2}\]. | 3. | Displacement reaction |
| 4. | Neutralization |
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 sodium zincate.
For each of the salt: A, B, C and D, suggest a suitable method of its preparation.
D is a soluble salt of zinc.
For the preparation of the following salts - give a balanced equation in the following case.
Lead [II] chloride from lead carbonate [give two equations]
