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Question
Valency and oxidation number of an element is the same number
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Solution
The correct option is B False
ValencyOxidation stateIt is the combining capacity of the element. NoO.S. is the charge present onplus or minus sign is attached to it. Eg.: NH3 thethe atom of the element when it is in combination.valency of N is +3 that of H is 1It may have plus or minus sign. Eg: in NH3, N has O.S. of−3 and that of H+1Valency of an element is usually fixed.O.S. of an element may have different values. It depends on the nature of compound in whichitis present. Eg.: S in Na2S4O6 is 2.5.Valency is always a whole number.O.S. of the element may be an integer or fractional.valency of the element can not be zero (except for noble gases)O.S. of the element can be zero. eg.: O.S. in CH2Cl2 is zero.In general, elements like C, N and S exhibit constantEven the elements C, N and S exhibit variable valency. Thus, valency of N in all its compounds isoxidation states. For example the O.S. of N in itsthreecompounds vary from +5 to −3 as: N2O5(+5), NO2(+4),N2O3(+3),NO(+2),N2O(+1),N2(0),N2H2(−2) and NH3(−3)
ValencyOxidation stateIt is the combining capacity of the element. NoO.S. is the charge present onplus or minus sign is attached to it. Eg.: NH3 thethe atom of the element when it is in combination.valency of N is +3 that of H is 1It may have plus or minus sign. Eg: in NH3, N has O.S. of−3 and that of H+1Valency of an element is usually fixed.O.S. of an element may have different values. It depends on the nature of compound in whichitis present. Eg.: S in Na2S4O6 is 2.5.Valency is always a whole number.O.S. of the element may be an integer or fractional.valency of the element can not be zero (except for noble gases)O.S. of the element can be zero. eg.: O.S. in CH2Cl2 is zero.In general, elements like C, N and S exhibit constantEven the elements C, N and S exhibit variable valency. Thus, valency of N in all its compounds isoxidation states. For example the O.S. of N in itsthreecompounds vary from +5 to −3 as: N2O5(+5), NO2(+4),N2O3(+3),NO(+2),N2O(+1),N2(0),N2H2(−2) and NH3(−3)
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