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प्रश्न
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).
Hydroxide
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उत्तर
| Name | Symbol | Ion | Valency |
| Hydroxide | \[\ce{[OH]}\] | \[\ce{[OH]^{1-}}\] | −1 |
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संबंधित प्रश्न
An element which can exhibit valencies of 2, 4 and 6 can be :
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it
Oxide
An atom of an element is denoted by a “symbol”. Explain the meaning of the term ‘symbol’. State a reason for representing the following element by its symbol.
Hydrogen by ‘H’
Match the noble gases – with their correct symbols:
| Noble gases | Symbols |
| (a) Helium | (1) Ar |
| (b) Neon | (2) Xe |
| (c) Argon | (3) Rn |
| (d) Krypton | (4) He |
| (e) Xenon | (5) Kr |
| (f) Radon | (6) Ne |
Match the formulas of the following of acids with their correct names:
Acids – (a) HCI (b) HNO3 (c) H2SO4 (d) H2CO3
Names – (1) Carbonic acid (2) Sulphuric acid (3) Hydrochloric acid (4) Nitric acid
Select the correct answer from the choice given below.
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Give the symbol of the following element:
Boron
State the type of element for the following:
Antimony
Write the chemical formula of the following:
magnesium sulphate
Mass of one atom of oxygen is
