Introduction

The KVPY (Kishore Vaigyanik Protsahan Yojana) SX 2017 exam has faced criticism over a few inaccuracies in its answers. This article delves into specific questions where the solutions provided are either biased or contain errors, highlighting the need for a thorough review and correction of the answers.

Biology Part 2

The KVPY SX 2017 exam included several questions in Biology Part 2 that faced scrutiny. One of the more straightforward questions that encountered controversy was Question 111, as outlined below:

Question 111

The genetic distance between genes A and B is 10 cM. An organism with the allele combination Ab is crossed with the organism having aB. What will be the percentage of gametes with the AB allele combination produced by an F1 individual?

The correct answer is expected to be C. 10, as the genetic distance is directly proportional to the percentage of recombination between the two genes. However, the answer provided in the official answer key is A. 1, which is incorrect. This reveals a significant flaw in the exam's solution manual.

Chemistry Level 2

The KVPY SX 2017 exam also included several Chemistry Level 2 questions that faced similarly biased or erroneous solutions. Here are a few examples:

Question 53

The question discusses the ratio of natural abundance of 35Cl and 37Cl isotopes. The calculations indicate that Cl-35 is present as nearly 77% and Cl-37 as 23%. The nearest ratio is approximately 3.5:1, which corresponds to option A. However, the official answer key gives the answer as B (3:1), which is incorrect based on the given data.

Question 108

The solution to Question 108 in the KVPY SX 2017 Chemistry Level 2 section is given as C, but a more detailed analysis suggests that the correct answer should be D. In a cyclic process, the change in internal energy (ΔU) is zero, indicating that the total heat exchange in the process equals the net work done (U q - w). Here, work done in path B-C is 1 L-atm, and in path A-B, the work done is -0.5 L-atm. In path C-A, no work is done because it is an isochoric process. Therefore, the total heat exchange should be:

qAB - 0.5 - 1 - 0 0.5 L-atm

Based on this, option D is the correct answer, as the total heat is 0.5 L-atm, contrary to the given answer.

Question 110

Question 110 asks to determine the molecular formula of a 2D lattice. According to the solution provided, none of the options are correct. This is due to the fact that the contributions of shared atoms in neighboring unit cells need to be considered, making the simple counts of 8 Y atoms and 1 X atom insufficient. Hence, it is clear that the provided options are not the correct molecular formula.

Conclusion

These examples from the KVPY SX 2017 exam highlight the necessity for rigorous review and validation of answers to ensure the accuracy and fairness of the questions. It is crucial for educators and examiners to address these flaws to maintain the integrity of such competitive exams.