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The oxidation states of the most electro...

The oxidation states of the most electronegative element in the products of the reaction between `BaO_(2)` with dilute `H_(2) SO_(4)` are

A

0 and -1

B

`-1 and -2`

C

`-2 and 0`

D

`-2 and +1`

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The correct Answer is:
B
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Oxidation number is the charge which an atom of an element has in its ion or appears to have when present in the combined state. It is also called oxidation state. Oxidation number of any atom in the elementary state is zero. Oxidation number of a monoatomic ion is equal to the charge on it. In compounds of metals with non metals, metals have positive oxidation number while non metals have negative oxidation numbers. In compounds of two difference elements, the more electronegative element has negative oxidation number whereas the other has positive oxidation number. In complex ions, the sum of the oxidation number of all the atoms is equal to the charge on the ion. If a compound contains two or more atoms of the same element, they may have same or different oxidation states according as their chemical bonding is same or different. The oxidation state of the most electronegative element in the products of the reaction between BaO_(2) and H_(2)SO_(4) are

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AAKASH SERIES-STOICHIOMETRY-Objective Exercise -2
  1. Consider the following redox reaction in which compound .X. is a produ...

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  2. Oxidation numbers of sulphur in H(2)S(3) molecule are

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  3. The oxidation states of the most electronegative element in the produc...

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  4. Calculate the oxidation number of iron in Fe(3)O(4)?

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  5. One mole of N(2) H(4) loses 10 moles of electrons to form a new compou...

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  6. Which of the following change requires a reducing agent

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  7. Whast is the oxidation state of Fe in the product formed when acidifie...

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  8. In the reaction, H(2)O(2)+PbS to H(2)O+PbSO(4) the increase in the oxi...

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  9. Why is the highest oxidation state of a metal exhibited in its oxide o...

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  10. Oxidation number of iodine in IO(3)^(-), IO(4)^(-), KI and I(2) respec...

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  11. Oxidation states of P in H4P2O5, H4P2O6 and H4P2O7 are respectively :

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  12. If three electrons are lost by Mn^(3+), its final oxidation state woul...

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  13. Bromine reacts with hot aqueous alkali to give bromide and bromate. Wh...

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  14. A, B and C are three elements forming part of a compound in oxidation ...

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  15. (A): The difference in the successive oxidation states exhibited by tr...

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  16. The oxidation number of sulphur in S(8), S(2)F(2) and H(2)S are

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  17. The oxidation number of nitrogen in NCI(3) is

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  18. What are the oxidation numbers of 'N' in NH(4)NO(3)?

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  19. The oxidation number of ..V.. in Rb(4) Na[HV(10)O(28)] is

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  20. N has fractional oxidation number in

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