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ChemHack > Chapter 8 : Redox Reactions > Flashcards

Chapter 8 : Redox Reactions Flashcards

1
Q

Define oxidation

A

Loss of electrons by any species

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2
Q

Define reduction

A

Gain of electron by any species

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3
Q

Reducing agent donate electrons.T/F

A

True

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4
Q

Oxidation is gain of electrons.T/F

A

False

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5
Q

Copper + zinc+2 gives zinc + copper+2.T/F

A

False

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6
Q

Arrange Cu, Ag, Zn in the order of electron releasing tendency

A

Zn greater than Cu greater than Ag

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7
Q

In superoxide oxidation number of zero is

A

-1/2

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8
Q

Oxidation number of O in OF2 and O2F2 is

A

+2 in OF2 and +1 in O2F2

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9
Q

In peroxide oxidation number of O is

A

-1

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10
Q

Oxidation number of h in LiH is

A

-1

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11
Q

In all its compounds, oxidation number of F is -1.T/F

A

True

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12
Q

Oxidation State denote the oxidation number of the compound.T/F

A

False, oxidation number denotes the oxidation state of the compound

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13
Q

Define oxidase oxidizing agent.

A

A reagent which can increase the oxidation number of an element in a given substance

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14
Q

Define reducing agent.

A

Reagent which lowers the oxidation number of an element in given substance

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15
Q

P4+ OH- +H2O gives

A

PH3 + H2PO2-

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16
Q

S8 + OH- Gives

A

S2- + S2O3 2-

17
Q

Cl2 + OH- gives

A

ClO- + Cl-

18
Q

F2 + OH-

A

F- + OF2 + H2O

19
Q

Which of the following will not show disproportionation reaction. ClO-, ClO2-, ClO3-, ClO4-

A

ClO4-

20
Q

Write the net ionic equation of the reaction of potassium dichromate(VI), K2Cr2O7 with sodium sulphide, NaSO3 in an acid solution to give chromium(III) ion and the sulphate ion

A

Cr2O7 2- (aq) + …..

21
Q

Permagnent ion MnO4- in basis solution oxidize iodide ion, I- to produce molecular iodine and manganese oxide write a balance ionic equation to represent this Redox reaction

A

6I- (aq) + ….

22
Q

Solved Bridge contains

A

YouTube containing a solution of KCl or NH4NO3 usually solidified by boiling with agar agar and letter cooling to a jelly like substance

23
Q

What is the function of Salt Bridge

A

To make the both half cell electrically neutral (as electron will flow from one week at to another it will cause development of electric potential opposite of the current flow direction. To break this potential Salt Bridge is used)

24
Q

What is the standard electrode potential

A

If the concentration of each species take part in the electrode reaction is unity (if any gas appears in electrode reaction it is confirmed to a atmospheric pressure) and further the reaction is carried out at 298 Kelvin, then the potential of each electrod said to be the Standard electrod potential

25
Q

A negative E couple in a vehicle reducing agent then the H+/H2 couple.T/F

A

False

ChemHack (4 decks)

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