5 mistakes to avoid in AIPMT

By Aakash Chaudhary

In general, candidates commit mistakes like improper reading of the question statements, marking the wrong answer in the OMR sheet, mismanagement of time like wasting time in solving the questions of Physics / chemistry, which are beyond the understanding of the candidate, attempting the paper too quickly due to lack of confidence. Some subject related common mistakes have been mentioned below.

Physics:

1. Negative value of a quantity doesn’t necessarily mean that it is shown as a decreasing quantity. For example, negative acceleration doesn’t mean velocity is decreasing, rather negative acceleration shows the direction of acceleration.
2. Angle of refraction and refracting angle are two different terms. Angle of refraction is denoted by ‘r’ and is seen in Snell’s law (m = sin i/sin r). But refracting angle means angle of prism A.

Chemistry: 

1. While solving numericals, most of the students ignore the units of physical quantities i.e. they consider J & KJ as same.

Solution:  Students must write the numerical values with their units while doing calculations.

2. Most of the students get confused while taking the value of universal gas constant‘R’. They take ‘0.0821’ as absolute value, which can be fatal.

Solution: The value of ‘R’ can be:

        0.0821 L-atm K^–1mol^–1 or

        8.314 JK^–1mol^–1 or

        0.0831 L-bar K^–1mol^–1 or

        1.9 cal K^–1mol^–1

Look ‘K^–1mol^–1’ is common with all numerical values, when pressure is given in terms of ‘atm’ or ‘bar’ the value should be 0.0821 or 0.0831. And, when energy is given in terms of J or cal then the value should be 8.314 or 1.9, respectively

Biology: 

In Biology, candidates normally commit mistakes in reading the statement properly. Many times, the question involves selection of false statement and students tend to read it as ‘true statement’.

In some cases, candidate answers the question with reference to what he/ she has read on the Internet or in medical books of higher level but this can be a mistake as the answer may be related to the level and how it has been discussed in the NCERT text.