General Science | Chemistry | Food Preservation, Nutrition, Medicine

General Science | Chemistry | Food Preservation, Nutrition, Medicine

Jan 28, 2025 - 16:12 Updated: Jan 28, 2025 - 16:24
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1. Which one of the following is used in food preservation?

Sodium Carbonate
Acetylene
Benzoic Acid
Sodium Chloride

2. Refrigeration helps in food preservation by

Killing the germs
Reducing the rate of biochemical reactions
Destroying enzyme action
Sealing the food with a layer of ice

3. Which one of the following substances is used in the preservation of food stuff?

Citric Acid
Potassium Chloride
Sodium Benzoate
Sodium Chloride

4. For the preservation of fruit juice which of the following is used?

Acetic acid
Formic acid
Sulphuric acid
Sodium Benzoate

5. Which of the following is a common refrigerant used in the domestic refrigerator?

Neon
Oxygen
Freon
None of these

6. Charcoal which is used in decolouring raw sugar is

Wood charcoal
Sugar charcoal
Animal charcoal
Coconut charcoal

7. The main component of honey is

Glucose
Sucrose
Maltose
Fructose

8. Aspartame is an artificial sweetner sold in the market. It consists of amino acids and provides calories like other amino acids. Yet, it is used as a low calorie sweetening agent in food items. What is the basis of this use?

Aspartame is as sweet as table sugar, but unlike table sugar, it is not readily oxidized in the human body due to lack of requisite enzymes
When aspartame is used in food processing, the sweet taste remains, but it becomes resistant to oxidation
Aspartame is as sweet as sugar but after ingestion into the body, it is converted into metabolites that yield no calories
Aspartame is several times sweeter than table sugar, hence food items made with small quantities of aspartame yield fewer calories on oxidation

9. Aspirin is obtained from

Petroleum
Earth
A tree
Chemical reaction of acids

10. Aspirin is

Antibiotic
Antipyretic
Reliever
None of the above

11. Which one of the following compounds is used as a sedative?

Potassium Bromide
Calcium Chloride
Ethyl Alcohol
Phosphorus Trichloride

12. Which one of the following forms an irreversible complex with a haemoglobin of the blood?

Carbon Dioxide
Pure Nitrogen gas
Carbon Monoxide
A mixture of Carbon Dioxide and Helium

13. Milk is an example of

A gel
A foam
An emulsion
A suspension

14. Which of these is not a colloid?

Milk
Blood
Ice cream
Honey

15. Milk is homogenized by

Adding a little sodium carbonate
Removing its fat
Breaking down fat particles to the microscopic size with the help of centrifuge
Boiling only

16. Milk openly placed for sometime becomes sour due to

Carbonic acid
Lactic acid
Citric acid
Acetic acid

17. Which one of the following acids is present in sour milk products?

Acetic acid
Butyric acid
Tartaric acid
Lactic acid

18. Which one of the following acids, is formed during the change of milk into curd?

Acetic acid
Ascorbic acid
Citric acid
Lactic acid

19. Curd making is an ancient 'Biotech- nological' process involving

Bacteria
Virus
Fungus
Protozoa

20. Which of the following oil is an extract of clove oil?

Methenol
Eugenol
Methenol
Benzayldehyde

21. Which one of the following fruits is most suitable for jelly making?

Mango
Papaya
Gauva
Wood apple

22. Organic food is supposed to be better for us because it

relies on chemicals to improve the flavour
is more expensive to buy
is grown in glasshouses keeping it clean of environmental pollutants
is grown without the use of artificial fertilizers and pesticides