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प्रश्न
Give example.
Composite radicals
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उत्तर
\[\ce{H3O^+, NH4^+, CO_3^2-, SO4^2-}\]
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संबंधित प्रश्न
What are polyatomic ions? Give examples.
Name the following radicals :
OH
Write the names of `"H"_2"S"` compounds :
Define ‘formula mass’ of a compound.
State whether the following statements are true or false :
A chloride ion has negative charge because it has more electrons than a neutral atom.
An element X has a valency of 2. Write the simplest formula for oxide of the element.
What is the difference between a cation and an anion ? Explain with examples.
The valencies (or charges) of some of the ions are given below :
Ion Valency Ion Valency (Charge) (Charge)
Sodium ion 1+ Nitrate ion 1–
Copper ion 2+ Sulphide ion 2–
Using this information, write down the formulae of :
- Sodium sulphide
- Copper nitrate
A particle X has 17 protons, 18 neutrons and 18 electrons. This particle is most likely to be :
A particle P has 18 electrons, 20 neutrons and 19 protons. This particle must be :
The valencies (or charges) of some of the ions are given below :
| Ion | Valency (Charge) | Ion | Valency (Charge) |
| Sodium ion | 1+ | Bromide ion | 1– |
| Ammonium ion | 1+ | Hydroxide ion | 1– |
| Calcium ion | 2+ | Sulphate ion | 2– |
| Lead ion | 2+ | Phosphate ion | 3– |
Using this information, write down the formulae of the following compounds :
(i) Sodium phosphate
(ii) Ammonium sulphate
(iii) Calcium hydroxide
(iv) Lead bromide
Give example.
Basic radicals
What do you understand by the following terms?
Basic radical
Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.
Calcium silicate
Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.
Sodium thiosulphate
Complete the following table.
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Acid Radicals `→` |
Chloride |
Nitrate |
Sulphate |
Carbonate |
Hydroxide |
Phosphate |
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Basic Radicals `↓` |
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Magnesium |
MgCl2 |
Mg(NO3)2 |
MgSO4 |
MgCO3 |
Mg(OH)2 |
Mg3(PO4)2 |
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Sodium |
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Zinc |
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Silver |
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Ammonium |
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Calcium |
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Iron (II) |
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Potassium |
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Name the following radicals and give their valencies:
1. SO4
2. CO3
3. OH4.
4.Cr2O7
State if the following element or radical is divalent?
Lithium
State if the following element or radical is divalent?
Carbide
State if the following element or radical is divalent?
Chromium
