Qc

Question 1

Oxidation and reduction processes essentially take place simultaneously in a reaction does one entity gets reduce in the process of oxidizing the second

Answer 1

Redox titration method

Question 2

A change in charge of one is equivalent to the gain or lose of 96,500C of electricity for each formula weight of Element or groups of elements involved

Answer 2

Faraday law

Question 3

Addition of oxygen removal of hydrogen, enhancement in the ratio of electronegative to the electropositive portion in the molecule

Answer 3

Oxidation

Question 4

Addition of hydrogen removal of oxygen enhancement in tye ratio of electropositive to electronegative portion of the molecule

Question 5

The equivalent weight of a reducing agent is the weight which losses electrons equivalent to one faraday

Answer 5

reduction equivalent weights

Question 6

The weight which games electron equivalent to one faraday or to electrons gain by one gram ion of hydrogen ions

Answer 6

Oxidation equivalent weight

Question 7

VDGEROA

Answer 7

Valence decrease gain of electrons with the reduction oxidizing agent

Question 8

VILEORA

Answer 8

Valence increase of electrons oxidation reducing agent

Question 9

A change in valence of the reacting products is a must which is contrary to precipitation and utilization methods of analysis were no change in valence occur

Answer 9

Oxidation reduction methods of analysis

Question 10

Major oxidizing agents

Answer 10

Potassium permanganate, potassium Dichromate, ceric sulfate

Question 11

Titrants of oxidizing agents in standard solution

Answer 11

Feric ammonium sulfate, potassium dichromate , potassium permanganate , potassium iodate, potassium bromate , potassium ferricyanide, ceric sulfate, Iodine and bromate

Question 12

Titrants of reducing agent in standard solution

Answer 12

Ferrous amonium sulfate , oxalic acid, titanium chloride , sulfur thiosulfate

Question 13

The quantitative estimations of a number of pharmaceutical substances maybe carried out by using a variety of potential oxidizing agent

Answer 13

Permanganate methods , dichromate methods , ceric sulphate titration methods

Question 14

Standardization of potassium permanganate

Answer 14

Officient acid must be present otherwise formation of a Brown color during titration may be observe

Similar Brown coloration can also be observe by using too high a temperature or by using a dirty flask

To avoid such anomalies always rinse the flask with solution of h2o2 and dilute h2so4 before performing the titrations

Question 15

Direct titration with potassium permanganate

Answer 15

Hydrogen peroxide solution and potassium Brunei are two from certifical substances that maybe estimated by employing 0.1N potassium permanganate solution and adopting the direct titration method

Question 16

ASSAY of hydrogen peroxide

Answer 16

Titration must be conducted in acid solution to maintain arizonablic constant hydrogen iron concentration

End point of titration process is pink

USB definition not less than 2.5 g and not more than 3.5 g of h2o2 per 100 ml

Question 17

Indirect titration method of permanganate oxidation

Answer 17

First converted by means of chemical reactions to an equivalent amount of oxalate which then subsequently oxidize quantitatively by permanganate

Question 18

Assay of Cherry juice for malic acid

Answer 18

Conversion of malic acid to an equivalent amount of calcium salat

Conversion of calcium salt to corresponding insoluble calcium of oxalate

Liberation of oxallate and subsequent oxidation with permanganate

Question 19

Measuring the amount of unreactive hydrogen peroxide in the sample compared with that found in the blank titration

Answer 19

Assay of precipitated manganese dioxide

Question 20

Assay of titanium dioxide xide

Answer 20

Reduction of an equivalent amount of Fe +3 to Fe + 2 by the Ti + 3 serves as a means by which titanium dioxide can be determine

Question 21

Residual titration method for pharmaceutical substances using potassium permanganate solution

Answer 21

Excess of standard oxalic acid added to substance then excess of oxalic acids back titrated with kmno4

Existandard pm and all for solution oxidize the product amount in exists estimated by reduction

Question 22

Standardization of oxallic acid

Answer 22

Purity of oxallic acid various due to the differences in the moisture content

Question 23

Exhibits much greater stability in aqueous solution in comparison to potassium permanganate

Inherent orange color which is intense enough to serve its own end point signal

Answer 23

Potassium Dichromate

Question 24

Powerful oxidizing agent in acidic medium

Salt has a bright yellow color and so its solution

Answer 24

Ceric sulfate

Question 25

Noon exist quantity of standard iodin solution is added in the substance (reducing agent) to be a side and then the excuse iodine maybe titrated with the help of standard subjon tayo sulfate solution

Answer 25

Residual iodimetric metric method

Question 26

Never performed in a strongly basic medium

Answer 26

Iodometric acid

Question 27

Direct titration with iodine

Residual titration method
- exist of iodine is titrated with excess thiosulfate

Answer 27

Iodometric assay

Question 28

Release of iodine and subsequent titration with sodium thiosulfate

Answer 28

Iodometric assays

Question 29

Sparingly soluble in water but undergo’s rapid dissolution in the presence of potassium iodide due to the information of the corresponding triiodized ion

Answer 29

Iodine

Question 30

In this titration method an excess of iodine solution is added to the solution of the substance and does the latter gets oxidize quantitatively

Answer 30

Residual titration method

Question 31

The pharmacutical substance oxidizes t i in an acidic medium to produce an equivalent quantity of iodine that maybe a assayed by titration with a standard solution of sodium thiosulphate

Answer 31

Iodometric determinations