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DAIRY CHEMISTRY

 

Chemical Quality Assurance

Compiled by: - Mr. Abhay Pandey

 

 

Q. Full form of HACCP

A.Hazard Analysis and Critical Control Point

  

Q. What is Quality control?

A.QC involves the set of activities used to ensure that the products and services meet requirements for quality.

  

Q.What is Quality Assurance(QA)?

A.QA is the set of activities which assures that the quality levels of the products and services are properly maintained and that the supplier and the customer quality issues are properly resolved

  

Q. Full form of TQM?

A.Total Quality Management

  

Q. Full form of TEI

A.Total Employee Involvement

 

 Q. Full form of TWE

A.Total Waste Elimination

  

Q. Full form of CCP

A. Critical Control Point.

 

 Q.HACCP based on ..........estabilised principles

A.7

 

Q. Legal standard for food products in INDIA

A.FSSAI

 

Q.Dairy products whose standards are given by AGMARK

A. Ghee and creamery butter

 

Q. AGMARK and BIS are compulsory and voluntary?

A.voluntary

 

Q.FSSAI standards are formulated by?

A.Central Committee for food standards (CCFS)

 

Q. FSSAI sample is collected by

A. Food inspector

 

Q. In how many parts food inspector divides the sample for further analysis

A.3(one public analyst and two parts to local health authority)

 

Q. In how many days public analyst have to give report?

A.40 days of receipt of sample

 

Q. Preservative used for preservation of sampleof milk?

A. Formalin (40%formaldehyde) @0.4%

 

Q. Preservative used for preservation of sample of ice cream and mixed ice cream?

A. Formalin @0.6%

 

Q. AGMARK stands for?

A.Agricultural marking

 

Q. Head quater of AGMARK at?

A. Faridabad

 

Q. Branched headquarter of AGMARK at

A. Nagpur

 

Q. According to AGMARK ghee clarification temperature should not exceed ?

A.110 degree C

 

Q.  CAC stands for?

A.Codex Alimentarius Commission

 

Q. Substance which can react with another substance or an agent capable of producing a chemical reaction is called?

A.reagent

 

Q. Solution whose strength or conc. is known is called?

A. Standard solution

 

Q. What is molarity?

A. Number of moles solute dissolved per litre of the solution.

 

           M=mole of solute/volume of solution in litre

 

Q. Relation between molarity and normality

A. N=M*x where is conversion factor

 

Q. Two types of standard substances?

A. Primary and secondary

 

Q. What are primary standard substances?

A. Those substances which can be obtained in pure and crystalline form as oxalic acid, sodium carbonate etc.

 

Q. What are secondary standard substances?

A. Those reagents which cannot be obtained in a pure form as NaOH,KOH etc.

 

Q. Boiling point of iso amyl alcohol

A.128-129 degree C

 

Q. At 27 degree C, density of iso amyl alcohol

A.0.803-0.805gm/ml

 

Q. What is Fehling A reagent?

A.CuSO4.5H2O

 

Q. What is Fehling B reagent?

A. Sodium potassiumtartrate/ Rochelle’s salt

Q. For checking the adulteration sugar, reagent is used

A.0.5% resorcinol solution in 3N HCl

 

Q. On adulteration test for sugar, colour of milk if it is adulterated with sugar

A. Red colour if positive and pale yellow and brown for blank sample

 

Q. Starch is added to the milk to increase

A. SNF content

 

Q. For detection of starch adulteration, reagent used

A.1%iodine solution

 

Q. Colour of positive sample for detection of adulteration of starch

A. Blue

 

Q. For detection of glucose adulteration, reagents used?

A. Braford’s reagent and phosphomolybdic acid

 

Q. Glucose added to the milk to increase

A. SNF content of milk

 

Q. On adulteration test for glucose, which colour will indicate presence of glucose

A. Blue

 

Q. Dextrin is added to the milk to increase

A. SNF content of milk

 

Q. Reagent used for detection of dextrin in milk

A.0.005 N iodine solution

 

Q. On testing adulteration of dextrin in milk, which colour will indicate presence of dextrin

A. Brown colour

 

Q. Rosalic acid test is used for detection of

A. Carbonate, bicarbonate and NaOH

 

Q. Which colour will indicate the presence of carbonate and bicarbonate in milk?

A. Pink colour

 

Q. Alkalinity of ash test is used to detect

A.  Neutralizers in milk

 

Q. If the volume of N/10 HCl exceeds  ......ml, it will indicate the presence of neutralizers in milk in alkalinity of ash test

A.1.2ml

 

Q. What is formalin?

A.40% solution of formaldehyde in water

 

Q.Hehner test used to detect?

A. Formalin in milk

 

 

Q. Leech test used to detect?

A. Formaldehyde

 

Q. For detection of H2O2 which reagent is used?

A.2% paraphenylene diamine solution

 

Q. Which colour indicates presence of H2O2 in milk?

A. Blue

 

Q. Reagent used for detection of urea in milk?

A.1.6%DMAB (para -dimethyl amino benzaldehyde)

 

Q. Which colour will indicate the presence of urea in the milk in urea test?

A. Yellow colour

 

Q. Which reagent is used with urease enzyme in testing of urea in milk?

A. Bromothymol blue

 

Q. Which reagent is used to detect pond water in the milk?

A.Diphenylamine

 

Q. What is present in pond water which reacts with diphenylamine?

A. Nitrates

 

Q. Which colour will indicate the presence of pond water in milk

A. Blue

 

Q. Nessler’s reagent is used to detect................. In milk

A. Ammonium compound

 

Q. What is Nessler’s reagent?

A. Potassium tetraiodomercurate(II)

 

Q. Whatindicates the presence of ammonium compound in milk?

A. Red brown colour

 

Q. For detection of common salt in milk which reagent is used?

A. Silver nitrate

 

Q. Which colour will appear when milk is adulterated with common salt and it is tested with silver nitrate

A. Yellow colour indicates the presence of common salt and red colour indicates absence of sodium chloride

 

Q.COB (clots on boiling) test is used to assess the suitability of milk for

A. Heat processing

 

Q. Test which is used to assess the suitability of milk for sterilization

A.Alcohol test

 

Q. In alcohol test what conc. of alcohol is used for cow/buffalo milk?

A.75%/68% respectively

 

Q. Conc of sulphuric acid used in Gerbermethod

A.90% by weight

 

Q. Conc of iso amyl alcohol used in Gerber method

A.95%

 

Q. Water bath temperature which  is used in Gerber method

A.65 _+2 degree C

 

Q. Rpm of centrifuge used in Gerber method

A.1000-1200 rpm

 

Q. Graduations present in milk butyrometer

A.0-10

 

Q. Graduations present in cream butyrometer

A.0-70

 

Q. Temperature of sample for Gerber method

A.30-40 degree C

 

Q. Specific gravity of Gerber sulphuric acid

A.1.820 at 15.6 degree C

 

Q. Graduations in butter butyrometer

A.0-90%

 

Q. Lactometer (BIS) calibrated at temperature

A.27 degree C

 

Q. Lane eynon method is used to determine .........in milk and milk products

A. Lactose

 

Q. Conservation factor for protein estimation of milk and milk products by kjeldahl method

A.6.38

 

Q. Milko-tester is to determine ...... in the milk

A. Fat % and SNF %

 

Q.  Chelating agent used in milko-tester to eliminate turbidity from milk

A.EDTA

 

Q. Rancimat is used to determine

A. Oxidative stability of milk and milk products

 

Q. Wavelength of D line used in butyro refractometer

A.589.3 nm

 

Q. Butyro refractometer works at the temperature

A. 20 degree C

 

Q. Flame photometer is a device which is used to determine

A. Alkali earth metal present in milk

 

Q.AAS technique capable of determining the presence of metal at the conc

A. Micro gram/ml

 

Q. “used by” date is used for

A. Highly perishable foods

 

Q. It is not............ to sell food that has reached its “best before” date

A. Illegal

 

Q. Acaricides are used to control

A. Mites

 

Q. Nematocides are used to control

A. Worms and Nematocides

 

Q. Molludcicides are used to control
A
. Snails

 

Q.DDT is an example of

A. Organochlorine type of pesticide

 

Q. An example of organophosphate type pesticide

A. Malathiol

 

Q.  Carbaryl is an example of

A. Organocarbamate type of pesticides

 

Q. Example of Amoniglycosides type of antibiotics

A.Apramycin, gentamicin, lincomycin, streptomycin, neomycin, amikamicin

 

Q. Example of bita- lactam compound type antibiotics

A. Penicillin.cephalosporins

 

Q. Example of macrolides type of antibiotics

A. Erythromycin,spiramycin,tylosin,roxithrocin

 

Q. Example of tetracyclines type of antibiotics

A. Chlorotetracycline,oxytetracycline,rolitetetracycine

 

Q.ADI stands for

A.Acceptable daily intake

 

Q.MRL stands for

A.Maximum residue limit

 

Q. Metal whose specific gravity is more than........ Called heavy metals

A.5g/cm cube

 

Q.  Atomic wt of Arsenic

A.74.9216

 

Q.A lethal dose of arsenic oxide is generally regarded as

A. 100mg

 

Q. Atomic wt of Lead

A.207.2

 

Q. Atomic wt of Hg

A.200.59

 

Q. The most important mercury salt

A.HgCl2

 

Q. Atomic wt of cadmium

A.122.4

 

Q. Which micro-organism is used in reference test for the determination of antibiotic residue in milk?

A.Bacillus steareothermophilus var.calidolactis

 

Q. Delvotest was developed for which antibiotic

A.Bita- lactam type

 

Q.Target micro-organism in delvotest

A.B.steareothermophillus

 

Q. Incubation time and temperature in delvotest

A.64 degree C for 2.5 hours

 

Q. Negative result in delvo test is indicated by

A. Colour change from purple for yellow

 

Q. Sensitivity of delvo test for penicillin-G

A.0.003-0.004IU/ml

 

 

 

 

References-

1.       E-Course Chemical Quality Assurance

2.       NDRI class notes by Dr. Kamal Gandhi

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