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Chemistry > Redox Reaction > Flashcards

Redox Reaction Flashcards

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1
Q

What is the Redox Reaction?

A

Reduction + Oxidation

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2
Q

What is the meaning of Oxidation Number?

A

Charge present on an atom in a chemical unit

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3
Q

Oxidation of free molecules or atoms, and naturally occurring chemical units will be always

A

0

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4
Q

Oxidation Number of ions

A

Charge present on ions

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5
Q

O.N. of alkali metals

A

+1

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6
Q

O.N. of alkaline earth metals

A

+2

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7
Q

O.N. of aluminum

A

+3

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8
Q

O.N. of oxygen

A

-2

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9
Q

O.N. of flourine

A

-1

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10
Q

Oxidation

A

Adding an electronegative element
Increase in oxidation number
Loss of electron

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11
Q

Reduction

A

Adding an electropositive element
Decrease in oxidation number
Gain of electron

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12
Q

Oxidising Agent

A

Agent which oxidises other and reduces itself

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13
Q

Reducing Agent

A

Agent which reduces other and oxidises itself

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14
Q

Normality

A

No. of gram equivalent of solute/ volume of solution in litres

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15
Q

N-factor of an acid

A

Removal of protons, valency factor

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16
Q

N-factor of a base

A

Acidity, Removal of -OH ion

17
Q

N-factor of a salt

A

Total +ve or -ve charge present in the salt

18
Q

N-factor of oxidising and reducing agent

A

Change in oxidation number per molecule

19
Q

O.N. of KMnO4 in all three medium

A

Acidic-5
Basic - 1
Neutral - 3

20
Q

Disproportionation Reaction

A

Reaction in which oxidation and reduction takes place in the same compound

21
Q

Comproportionate Reaction

A

Reverse of disproportionate reaction

22
Q

Indicators

A

Weak organic acids or weak organic bases which indicate the end point of a reaction

23
Q

Phenolphthalein

A

Weak organic acid has a pH range of 8.3 to 10.5

24
Q

Colour that Phenolphthalein changes to in acidic and basic medium

A

Colourless and Light Pink

25
Q

Methyl Orange

A

Weak organic base having a pH range of 3.1 to 4.4

26
Q

Colour that Methyl Orange changes to in acidic and basic medium

A

Yellow and Red

27
Q

Hard Water and Soft Water

A

Water which cannot form foam and water which can form foam

28
Q

Temporary and Permanent Hardness is due to

A

Temporary - Due to bicarbonates of calcium and magnesium
Permanent - Due to chlorides and sulphates of calcium and magnesium

29
Q

Methods to remove temporary hardness

A

Boiling, Clerks Method, Treatment with washing soda

30
Q

Methods to remove permanent hardness

A

Ion-Exchange method, Resins

Chemistry (16 decks)

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