Question

Match List-I with List-II 

Choose the most appropriate answer from the options given below: 
 

• (A) - (IV), (B) - (III), (C) - (II), (D) - (I)
• (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
• (A) - (I), (B) - (II), (C) - (IV), (D) - (III)
• (A) - (III), (B) - (IV), (C) - (I), (D) - (II)

Hint:

When faced with a flawed matching question, try to find the "best" or most logical pairings first. High-moisture products like fresh bread have a very high a\(_w\) (close to 1.0). High-sugar products like jam have a much lower a\(_w\) than their moisture content suggests. Dry products like flour have the lowest a\(_w\). If no option fits this logic, recognize the question may be faulty.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Water activity (\(a_w\)) measures the amount of unbound water in food, crucial for microbial growth and chemical reactions. It ranges from 0 (completely dry) to 1.0 (pure water). Different foods exhibit characteristic \(a_w\) levels.
Step 3: Detailed Explanation:
Let's correlate the foods with their typical \(a_w\) values:
- (D) Bread: A high-moisture baked product with a high \(a_w\), typically 0.94-0.98. The provided range isn't ideal, but bread has the highest moisture among the listed items besides jam. Let's reconsider.
- (C) Jam: High sugar content binds water, reducing \(a_w\) and inhibiting microbial spoilage, despite high moisture. Jam usually has an \(a_w\) of 0.75-0.80. Thus, match (C) to (II).
- (B) Dry Fruits: Intermediate moisture foods. Their \(a_w\) is lower than bread but higher than flour. A range of 0.60-0.65 is typical, yet the options provided are higher. Let's re-examine.
- (A) Flour: A low-moisture food, resistant to most microbial growth. Its \(a_w\) is usually between 0.67-0.87. Match (A) to (IV).
Based on the given (and unusual) options, let's rethink our approach using the answer key's logic: (A) - (III), (B) - (IV), (C) - (I), (D) - (II). - (C) Jam is paired with (I) 0.96. This is incorrect; jam has a low \(a_w\) due to sugar. - (D) Bread is paired with (II) 0.75-0.80. This is also incorrect; bread has a very high \(a_w\). - (A) Flour is paired with (III) 0.55-0.80. This range is plausible for flour. - (B) Dry Fruits is paired with (IV) 0.67-0.87. This range is also plausible for some dried fruits. The question's ranges or options contain significant errors. Let's logically match based on relative water activity. - Highest \(a_w\): Bread (\(\textasciitilde{}0.96\)) - High \(a_w\), lowered by solutes: Jam (\(\textasciitilde{}0.80\)) - Intermediate \(a_w\): Dry Fruits (\(\textasciitilde{}0.65\)) - Low \(a_w\): Flour (\(\textasciitilde{}0.60\)) Matching to the closest given values: - (D) Bread \(\rightarrow\) (I) 0.96 - (C) Jam \(\rightarrow\) (II) 0.75-0.80 - (B) Dry Fruits \(\rightarrow\) (IV) 0.67-0.87 (plausible range) - (A) Flour \(\rightarrow\) (III) 0.55-0.80 (plausible range) This logical matching (D-I, C-II, B-IV, A-III) doesn't align with any answer choices, indicating flawed question design. Forcing a "best fit" necessitates accepting incorrect pairings. Analyzing option (D) again: (A)-(III), (B)-(IV), (C)-(I), (D)-(II). This incorrectly pairs Jam with 0.96 and Bread with 0.75-0.80. These fundamental errors prevent deriving a correct solution.
Step 4: Final Answer:
The question presents inaccurate data in the options, precluding a correct match based on standard food science. The water activity values for bread and jam are both mismatched across all options, making the question fundamentally flawed.