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प्रश्न
Two elements X and Y have valencies of 5 and 3, and 3 and 2, respectively. The elements X and Y are most likely to be respectively :
पर्याय
copper and sulphur
sulphur and iron
phosphorus and nitrogen
nitrogen and iron
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उत्तर
nitrogen and iron
Elements X and Y, most likely, are nitrogen and iron.
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संबंधित प्रश्न
The atoms of which of the following pair of elements are most likely to exist in free state ?
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of its
Acetate
State what a chemical formula denotes.
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
K1+ Cl1-
Give the symbol of the following element:
Magnesium
Write the radical of the following valency:
Sodium
Write the radical of the following valency:
Carbonate
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Tin
write symbol with the variable valency
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).
Phosphate
Name three metals whose symbols are derived from the first letter of the name of the element.
