Tag: food spoilage and food preservation

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Multiple choice chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

Match the column I with column II and mark the appropriate choice.

Column I Column II
(A) Alitame (i) Antihistamine
(B) Iodoform (ii) Artificial sweetener
(C) Prontosil (iii) Antibacterial agent
(D) Terfenadine (iv) Antiseptic
  1. (A) $\rightarrow$(i), (B) $\rightarrow$(ii), (C) $\rightarrow$(iv), (D) $\rightarrow$(iii)
  2. (A) $\rightarrow$(ii), (B) $\rightarrow$(iv), (C) $\rightarrow$(iii), (D) $\rightarrow$(i)
  3. (A) $\rightarrow$(iii), (B) $\rightarrow$(i), (C) $\rightarrow$(ii), (D) $\rightarrow$(iv)
  4. (A) $\rightarrow$(iv), (B) $\rightarrow$(iii), (C) $\rightarrow$(i), (D) $\rightarrow$(ii)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Antiseptics are applied to the living tissues such as wounds, cuts, ulcers and diseased skin surfaces. Iodoform is used as an antiseptic for wounds.
  • Alitame is high potency Artificial sweetener, the control of sweetness of food is difficult while using it.
  • Prontosil, also called sulfamidochrysoidine, trade name of the first synthetic drug used in the treatment of general bacterial infections in humans.It is an Antibacterial agent.
  • Antihistamines interfere with the natural action of histamine by competing with histamine for binding sites of receptor where histamine exerts its effect.Synthetic drugs, brompheniramine (Dimetapp) and terfenadine (Seldane), act as antihistamines.
Multiple choice chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

Which of the following is a food antioxidant?

  1. Butylated hydroxytoluene (BHT)

  2. Butylated hydroxyanisole (BHA)

  3. Saccharin

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Butylated hydroxytoluene is  an organic compound primarily used as an antioxidant food additive.

Butylated hydroxyanisole (BHA) is an antioxidant consisting of a mixture of two isomeric organic compounds, 2-tert-butyl-4-hydroxyanisole and 3-tert-butyl-4-hydroxyanisole.

Saccharin is an artificial sweetener.

Option D is correct.
Multiple choice evs - i methods of preserving food food spoilage and food preservation chemicals in food food chemistry

Fermentation was discovered by:

  1. Vant Hoff and Le Bell.

  2. Louis Pasteur.

  3. Berzelius.

  4. Kolbe.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Louis Pasteur discovered fermentation.


 In 1860, he demonstrated that bacteria cause souring in milk, a process formerly thought to be merely a chemical change, and his work in identifying the role of microorganisms in food spoilage led to the process of pasteurization.

 Option B is correct.

Multiple choice chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

Name two $\alpha$-amino acids, which form a dipeptide, which is 100 times more sweet than cane sugar?

  1. Aspartic acid

  2. Alanine

  3. Serine

  4. Phenylalanine

  5. Tryptophan
Reveal answer Fill a bubble to check yourself
A,D Correct answer
Explanation

Aspartame is the artificial sweetener, which is 100 times more sweet than cane sugar. It is methyl ester of dipeptide formed from aspartic acid and phenylalanine.

Multiple choice chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

Non-degradable and fat-soluble pollutant, such as DDT enters the food chain, the pollutant:

  1. magnifies in concentration at each trophic level

  2. degrades at first trophic level

  3. accumulates in the body fat of organism at the first trophic level and does not pass to second trophic level

  4. decreases in concentration at each trophic level
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Biomagnification is the accumulation or increasing concentration of lipophilic pesticides in the top members of the food chain. 
During biomagnification, the concentration of non-degradable pesticide like DDT goes on increasing along the food chain and highest values occur in the consumers of the top trophic level. So, the value of pesticide will go on increasing at each trophic level. 

Thus, the correct answer is option A.