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How to find Oxidation no. of
an element by their compound ?
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Answer 1

$\huge\mathfrak\red{heya\:Mate}$

$\huge\boxed{\fcolorbox{blue}{pink}{Answer}}$

$\huge\mathbb\red{Oxidation No. }$

Before you understand oxidation no. first we know about oxidation:-

A substance can said to be oxidized if :-

1. It gains oxygen and loss hydrogen.

2. Increasment in ratio of electronegative radical or decreasment in ratio of electropositive radical.

3. Loss of electrons by species.

The oxidation number of a free element is always 0.

The oxidation number of a free element is always 0.The oxidation number of a monatomic ion equals the charge of the ion.

$\huge\bold\red{</em></strong><strong><em>S</em></strong><strong><em>o</em></strong><strong><em>m</em></strong><strong><em>e</em></strong><strong><em> </em></strong><strong><em>Rules</em></strong><strong><em>!</em></strong><strong><em>!</em></strong><strong><em>}$

• The oxidation number of

The oxidation number of H

The oxidation number of H is +1, but it is -1 in when combined with less electronegative elements.

• The oxidation number of H is +1, but it is -1 in when combined with less electronegative elements.The oxidation number of

The oxidation number of H is +1, but it is -1 in when combined with less electronegative elements.The oxidation number of O

The oxidation number of H is +1, but it is -1 in when combined with less electronegative elements.The oxidation number of O in compounds is usually -2, but it is -1 in peroxides.

• The oxidation number of H is +1, but it is -1 in when combined with less electronegative elements.The oxidation number of O in compounds is usually -2, but it is -1 in peroxides.The oxidation number of a Group 1 element in a compound is +1.

• The oxidation number of H is +1, but it is -1 in when combined with less electronegative elements.The oxidation number of O in compounds is usually -2, but it is -1 in peroxides.The oxidation number of a Group 1 element in a compound is +1.The oxidation number of a Group 2 element in a compound is +2.

• The oxidation number of H is +1, but it is -1 in when combined with less electronegative elements.The oxidation number of O in compounds is usually -2, but it is -1 in peroxides.The oxidation number of a Group 1 element in a compound is +1.The oxidation number of a Group 2 element in a compound is +2.The oxidation number of a Group 17 element in a binary compound is -1.

• The oxidation number of H is +1, but it is -1 in when combined with less electronegative elements.The oxidation number of O in compounds is usually -2, but it is -1 in peroxides.The oxidation number of a Group 1 element in a compound is +1.The oxidation number of a Group 2 element in a compound is +2.The oxidation number of a Group 17 element in a binary compound is -1.The sum of the oxidation numbers of all of the atoms in a neutral compound is 0.

• The oxidation number of H is +1, but it is -1 in when combined with less electronegative elements.The oxidation number of O in compounds is usually -2, but it is -1 in peroxides.The oxidation number of a Group 1 element in a compound is +1.The oxidation number of a Group 2 element in a compound is +2.The oxidation number of a Group 17 element in a binary compound is -1.The sum of the oxidation numbers of all of the atoms in a neutral compound is 0.The sum of the oxidation numbers in a polyatomic ion is equal to the charge of the ion.

Now take eg:- in K2Cr2O7.

in K2Cr2O7.Let oxidation number of Cr be 'x' then,

in K2Cr2O7.Let oxidation number of Cr be 'x' then,Oxidation number of K is +1 and that of O is -2 then,

in K2Cr2O7.Let oxidation number of Cr be 'x' then,Oxidation number of K is +1 and that of O is -2 then,2*1+2*x+7*-2=0

in K2Cr2O7.Let oxidation number of Cr be 'x' then,Oxidation number of K is +1 and that of O is -2 then,2*1+2*x+7*-2=0Solving the equation, we get x=6.

in K2Cr2O7.Let oxidation number of Cr be 'x' then,Oxidation number of K is +1 and that of O is -2 then,2*1+2*x+7*-2=0Solving the equation, we get x=6.This means oxidation number of Cr is 6.

Hope it helps!!

Answer 2

❣️HLO MATE ❣️

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★The oxidation number of a free element is always 0.

★The oxidation number of a monatomic ion equals the charge of the ion.

★The oxidation number of H is +1, but it is -1 in when combined with less electronegative elements.

★ The oxidation number of O in compounds is usually -2, but it is -1 in peroxides.

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