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प्रश्न
Give the symbols and valencies of following radicals:
(a) Hydroxide (b) Chloride
(c) Carbonate (d) ammonium
(e) Nitrate
उत्तर
| Radicals | Symbol | Valencies |
| (a) Hydroxide | `OH^-` | 1 |
| (b) Chloride | `Cl^-` | 1 |
| (c) Carbonate | `CO_3^(2-)` | 2 |
| (d) Ammonium | `NH_4^+` | 1 |
| (e) Nitrate | `NO_3^-` | 1 |
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संबंधित प्रश्न
Give two symbols which have been derived from the "English names" of the elements.
What is the significance of the symbol of an element ? Explain with the help of an example.
Fill in the blank:
Symbol represents _____ atom(s) of an element.
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(a) OH
(b) So4
(c) No3
(d) Co3
Combining power or capacity – A : 3; B : 2; C : 1. (negative valencies)
Match the formulas of the following of bases with their correct names.
Bases – (a) NaOH (b) KOH (c) Ca(OH)2 (d) Zn(OH)2
Names – (1) Potassium hydroxide (2) Zinc hydroxide (3) Aluminium hydroxide (4) Calcium hydroxide (5) Sodium hydroxide
State the type of element for the following:
Mercury
State the type of element for the following:
Platinum
Give the formula of the following gas:
Sulphur dioxide
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Bromide
What is meant by the term ‘symbol’?
