Question

R_i Hingers hypothesis relates
(i) Energy used in size reduction
(ii) New surface area produced
(iii) Equivalent shape
(iv) Reynold’s number
Arrange the correct order

• A. i and ii
• B. ii and iii
• C. i and iii
• D. i and iv

Answer 1

The Correct Option is A

To solve this question, let's first understand the context of Rittinger's hypothesis which relates to size reduction in the field of Pharmaceutical Engineering:

1. Rittinger's Hypothesis states that the energy required for size reduction is directly proportional to the new surface area created. Mathematically, it suggests that the energy used in size reduction is related to the increase in surface area of particles.
2. This hypothesis assumes that particles are of equivalent shape, though it does not directly deal with the shape itself.
3. Reynold’s number is unrelated to Rittinger’s Hypothesis as it deals with fluid dynamics rather than size reduction.

Given the options and understanding of Rittinger's hypothesis:

• Option i and ii: This correctly represents Rittinger's hypothesis, where (i) is the energy used in size reduction and (ii) is the new surface area produced.
• Option ii and iii: While (ii) is correct, (iii) equivalent shape isn't directly addressed in Rittinger's hypothesis.
• Option i and iii: (i) is correct, but (iii) again is not directly related to the hypothesis.
• Option i and iv: While (i) is correct, (iv) relates to fluid flow, not size reduction.

Therefore, the correct answer is the pair that directly corresponds to Rittinger's hypothesis: Option i and ii.

In conclusion, Rittinger's hypothesis is best described as relating to the energy used in size reduction and the new surface area produced.