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प्रश्न
Choose the most appropriate answer from
(SO2, SiO2, Al2O3, CO, MgO, Na2O)
A covalent oxide of a metalloid.
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उत्तर
Silicon is a metalloid. The covalent oxide is SiO2
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.
How is the following salt prepared:
Lead carbonate from lead nitrate.
Explain why fused calcium chloride is used in the preparation of FeCI3?
Write equation for the laboratory preparation of the following salt, using sulphuric acid: Iron (II) sulphate from the iron.
Write the equation for the following reaction:
Magnesium sulphate solution is mixed with barium chloride 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:
Copper sulphate.
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 sulphate.
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]
