Tag: chemistry

Questions Related to chemistry

The sweeteners value of aspartame in comparison to cane sugar is:

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

  1. 550

  2. 100

  3. 600

  4. 2000

Show answer
Correct Option: B
Explanation:
  • Sugar substitutes are substances that are used in place of sweeteners with sugar (sucrose) or sugar alcohols. They may also be called artificial sweeteners.
  • Natural sweeteners add to calorie intake and therefore many people prefer to use artificial sweeteners.
  • Aspartame is the most successful and widely used artificial sweetener. It is roughly 100 times as sweet as cane sugar. It is methyl ester of dipeptide formed from aspartic acid and phenylalanine. Use of aspartame is limited to cold foods and soft drinks because it is unstable at cooking temperature.

Which of the following is not a food additive?

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

  1. Preservatives

  2. Sweetening agents

  3. Flavours

  4. Oxidants

Show answer
Correct Option: D
Explanation:

Antioxidants are added to food to prevent it from spoiling.

Name an artificial sweetener which is derivative of sucrose.

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

  1. Saccharine

  2. Sucrolose

  3. Sucrobenzamide

  4. Aspartame

Show answer
Correct Option: B
Explanation:

Surolose is trichloro derivative of sucrose. Its appearance and taste are like sugar.

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

  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)

Show answer
Correct Option: B
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.

Which of the following is a food antioxidant?

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

  1. Butylated hydroxytoluene (BHT)

  2. Butylated hydroxyanisole (BHA)

  3. Saccharin

  4. Both A and B

Show answer
Correct Option: D
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.

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

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

  1. Aspartic acid

  2. Alanine

  3. Serine

  4. Phenylalanine

  5. Tryptophan

Show answer
Correct Option: A,D
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.

Aspartame is unstable at cooking temperature. Where would you suggest aspartame to be used for sweetening?

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

  1. Soft drinks

  2. Cold drinks

  3. Both of them

  4. None of these

Show answer
Correct Option: C
Explanation:

Aspartame is unstable at cooking temperature, hence it can used in soft drinks and cold drinks for artificial sweetening.

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

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

  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

Show answer
Correct Option: A
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.

Currency notes can be marked with an invisible ink. Thieves can be trapped because this ink

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

  1. Shows up in ultraviolet light

  2. Turns red on adding alkali

  3. Turns blue on adding acid

  4. It attracted by a magnet

Show answer
Correct Option: A
Explanation:

Invisible ink shows up in ultraviolet light.

Modern UV-invisible ink is mainly made by a fluorescent derived from things in nature that glow when exposed to an UV light.

Four samples of arhar dal were taken in four test tubes with some water in each and
labelled P,Q, R and S. A few drops of the following were added to these test tubes,
water to test tube P, HCl to test tube Q, NaOH to test tube R and alcohol to test tube S.
We would be able to confirm adulteration of the dal with metanil yellow in test tubes :

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

  1. Q

  2. Q and R

  3. R and S

  4. S and P

Show answer
Correct Option: A
Explanation:

Metanil yellow adulteration in foods can be identified upon addition of HCl to the solution. 


As HCl with metanil yellow gives pink colour. 

Therefore, the adulteration could be confirmed only in test tube Q.

Hence the correct option is A.