Redox Reaction

Question 1

Reactions that involve transfer of electrons

Answer 1

Redox Reactions

Question 2

A reaction which occurs between a reducing and
oxidizing agent

Answer 2

Redox Reactions

Question 3

An increase in oxidation number of an atom signifies?

Answer 3

Oxidation from +2 to +4

Question 4

A decrease in oxidation number of an atom signifies?

Answer 4

Reduction from 0 to -1

Question 5

Oxidation and reduction always occur together in a chemical reaction

Answer 5

redox reactions

Question 6

Very Strong OA na Self-indication and widely used

Answer 6

KMnO4

Question 7

Slightly weaker OA, available as primary standard, and stable

Answer 7

K2Cr2O7

Question 8

Powerful OA, Highly affected by acid used, Very unstable, very expensive

Answer 8

Ce(SO4)2

Question 9

weaker OA, Not suitable in water - KI

Answer 9

I2

Question 10

Powerful OA in the presence of an acid, very sensitive, Methyl orange

Answer 10

KBrO3

Question 11

used in the assay of I^-, As^3+, etc, reduction potential varies with Assay conditions, depends on the formation of ICl in highly acidic solutions

Answer 11

KIO3

Question 12

Standardized using ascorbic acid, self-indicating

Answer 12

DCIP

Question 13

Less common OA, very sensitive to light - requires standardization

Answer 13

Ke3Fe(CN)6

Question 14

Enumerate some oxidizing agents

Answer 14

KMnO4
K2CrO7
Ce(SO4)2
I2
KBrO3
KIO3
DCIP
K3Fe(CN)6

Question 15

Enumerate some reducing agents

Answer 15

H2C2O4
Na2S2O3
As2O3
TiCl3
Fe(NH4)2(SO4)2

Question 16

Residual Titration with KMnO4 and deteriorates upon standing

Answer 16

H2C2O4

Question 17

Common RA that is stable to air oxidation, Stable - can be kept for long periods, titer value is affected by bacteria

Answer 17

Na2S2O3

Question 18

It is solubilized by NaOH or KOH, a RA in neutral or alkaline medium, and acts as OA in acidic medium

Answer 18

As2O3

Question 19

Very power RA, Titration of Fe, Sn, Cr, V, ClO4-

Answer 19

TiCl3

Question 20

Slowly oxidized by air in H2SO4 and is a common titrating agent, not a strong RA and can be used to titrate strong OA sych s Ce, Cr, V. Should be standardized

Answer 20

Fe(NH4)2(SO4)2

Question 21

For Assay of sulfa drugs and other compounds containing arylamino group

Answer 21

NaNO2

Question 22

What are some of the indicators of detection of endpoint

Answer 22

Self-indication
Redox Indicators
Starch Indicators
External Indicators

Question 23

employed if the titrant is highly colored

Answer 23

Self-indication

Question 24

highly colored dyes that are weak
reducing or oxidizing agents that can be oxidized or
reduced

Answer 24

Redox Indicators