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Redox Reactions

Question
CBSEENCH11006738
Wired Faculty App

Assign oxidation number of the underlined elements in each of the following species:
space space space NaH subscript 2 bottom enclose straight P straight O subscript 4

Solution
space space space space NaH subscript 2 bottom enclose straight P straight O subscript 4.
Let the oxidation number of P = x
Writing the oxidation number of each atom at the top of its symbol.
                 +1 + 1 x - 2
                 Na  H2PO4    
Sum of the oxidation number of various atoms = 0
                                +1+2(+1)+x+4(-2) = 0
                                        x - 5 = 0
or                                      x = 5
space space space therefore  Oxidation number of P in NaH2PO4 = 5 

Some More Questions From Redox Reactions Chapter

What are direct redox reactions? Give one example.

What are indirect redox reactions?

Write formulas for the following compounds:
(a) Mercury (II) chloride
(b) Nickel (II) sulphate
(c) Tin (IV) oxide
(d) Thallium (I) sulphate
(e) Iron (III) sulphate
(f) Chromium (III) oxide

What are electrolytes?

What are cations and anions?

What is electrolysis?

Mention two uses of electrolysis.

Define oxidation number of an element.

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