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प्रश्न
Write the balanced equation for the preparation of the following compounds, starting from iron and other substance:
Iron (II) sulphide
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उत्तर
\[\ce{Fe + S -> FeS}\]
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संबंधित प्रश्न
How is the following salt prepared:
Lead carbonate from lead nitrate.
Describe giving all practical details, how would you prepare:
lead sulphate from metallic lead.
Explain hydronium ion. Write the ionization of sulphuric acid showing the formation of hydronium ion.
Which of the following methods, (a), (b), (c), (d) or (e) is generally used for preparing the chlorides listed below from (i) to (v). Answer by writing down the chloride and the letter pertaining to the corresponding method. Each letter is to be used only once.
(a) Action of an acid on a metal.
(b) Action of an acid on an oxide or carbonate.
(c) Direct combination.
(d) Neutralization of an alkali by an acid.
(e) Precipitation (double decomposition).
(i) copper(II) chloride.
(ii) iron(II) chloride.
(iii) iron(IIl) chloride.
(iv) lead (II) chloride.
(v) sodium chloride.
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?
Carbon dioxide and sulphur dioxide gas can be distinguished by using ______.
Explain the following method with example.
Direct combination
Mention the colour changes observed when the following indicators are added:
| Solution | Acids | Alkalies |
| (a) Alkaline phenolphthalein solution | ||
| (b) Methyl orange solution | ||
| (c) Neutral litmus solution |
The following is a list of methods for the preparation of salts.
A – direct combination of two elements.
B – reaction of a dilute acid with a metal.
C – reaction of a dilute acid with an insoluble base.
D – titration of a dilute acid with a solution of soluble base.
E – reaction of two solutions of salts to form a precipitate.
Choose from the above list A to E, the best method of preparing the following salt by giving a suitable equation in the following case:
Sodium sulphate.
Select the word/s given which are required to correctly complete the blanks.
When solution M and O are mixed together, the products will be ______ and ______.
