Bissoy.com
Doctors Medicines MCQs Q&A

Which of the following is not an indirect method of moisture determination in a food sample

Which of the following is not an indirect method of moisture determination in a food sample Correct Answer Karl Fischer Method

Karl Fischer titration is a method for determining water content. This method was developed by a chemist named Karl Fischer. It is based on a reagent that reacts with water to convert it into a non-conductive chemical. Karl Fischer accurately determines the moisture content of products. Two Karl Fischer titration methods are used. One is known as volumetric Karl Fischer. Another method is known as the Karl Fischer coulometric method.

DIAGRAM OF KARL FISCHER METHOD-

 Important Points

Methods of measuring moisture content fall into 2 groups: direct and indirect. Direct methods include gravimetric methods, azeotropic distillation, Fischer titration, and extraction methods. Indirect methods include electrical-electronic methods, sonic and ultrasonic methods, and spectroscopic methods.Additional Information

​Karl Fischer titration is used as a robust and reliable method. In the food industry, it is used for the determination of water content in cocoa powder, chips, honey, noodles, fruit juices, and flour, etc.

Related Questions

In the question below are given six statements followed by four conclusions numbered I, II, III and IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts. Statements: All Petrol are Gasoline. No petrol is Water. Some Water are Gas. Some Moisture are Gas. All Gasoline are Fire No Moisture is Fire Conclusions: I. Some Moisture are Gasoline. II. Some Water are Moisture. III. Some Gasoline are Gas. IV. Some Petrol are Moisture.
In the New Year’s party 500 were invited. 200 people opted for Indian food, 150 eaten Italian food and 100 people taken continental food. 14 people have taken both Indian and Italian food, 10 people have taken both Italian and continental food and 15 people have eaten both Indian and continental food. 6 people have taken all three kind of food. Find how many people have only Italian food?
In the New Year’s party 500 were invited. 200 people opted for Indian food, 150 eaten Italian food and 100 people took continental food. 14 people have taken only both Indian and Italian food, 10 people have taken only both Italian and continental food and 15 people have eaten only both Indian and continental food. 6 people have taken all three kind of food. Find how many people have not attended the party?
Five friends Lakshmana, Muskaan, Harish, Kumar and Pikun, “are having food, each of whom is in one of these five hotels – Kent, Pushpak, Hyatt, Lalit and Marriott. 1. The first letter of the hotel is not the same as the first letter of the person having food. 2. Muskaan and Pikun are not eating in Kent. 3. Harish is not eating food in Pushpak or Kent. 4. Kumar is not eating food in Pushpak. 5. Pikun is not eating food in Lalit or Hayat. Where is Kumar eating food?
Combined carbon content in iron and steel is determined by treating the sample with dilute HNO3. So that combined carbon forms a soluble brown nitrated compound, the intensity of which is matched with that of a standard sample of similar composition treated under similar condition. The intensity of color produced is proportional to the carbon content of iron of steel sample. This method of combined carbon determination is called the
Equilibrium moisture of a solid is equal to the total moisture minus free moisture. Which of the following substances will have maxi-mum equilibrium moisture?
Equilibrium moisture of a solid is equal to the total moisture minus free moisture. Which of the following substances will have maximum equilibrium moisture?
200 kg of solids (on dry basis) is subjected to a drying process for a period of 5000 seconds. The drying occurs in the constant rate period with the drying rate as, Nc = 0.5 × 10-3 kg/m2.s. The initial moisture content of the solid is 0.2 kg moisture/kg dry solid. The interfacial area available for drying is 4 m2/1000 kg of dry solid. The moisture content at the end of the drying period is (in kg moisture/kg dry solid)
A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids)
It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%).