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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
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संबंधित प्रश्न
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 (III) chloride.
Explain why It is necessary to find out the ration of reactants required in the preparation of sodium sulphate.
Explain hydronium ion. Write the ionization of sulphuric acid showing the formation of hydronium ion.
Choosing only substances from the list given in the box below, write equations for the reactions which you would use in the laboratory to obtain:
(i) Sodium sulphate
(ii) Copper sulphate
(iii) Iron (II) sulphate
(iv) Zinc carbonate
| Dilute sulphuric acid |
Copper, Iron, |
Copper carbonate, Sodium carbonate |
Write equation for the laboratory preparation of the following salt, using sulphuric acid: Iron (II) sulphate from the iron.
The diagram given below is to prepare iron (III) chloride in the laboratory.
(i) What is substance B?
(ii) What is the purpose of B?
(iii)Why is iron (III) chloride to be stored in a closed container?
(iv) Write the equation for the reaction between iron and chloride ?
Write the equations for the reaction to prepare lead sulphate from lead carbonate.
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.
What is the difference between the chemical nature of an aqueous solution of HCl and an aqueous solution of NH3
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 ______.
