Correct Answer: 65%

Solution : The ratio of chocolate to milk in mixture A = 4 : 3 
The ratio of chocolate to milk in mixture B = 5 : 2
Let 5 units taken from mixture A and 6 units taken from mixture B.
The ratio of chocolate to milk in new mixture = $(5\times \frac{4}{7} + 6\times \frac{5}{7}):(5\times \frac{3}{7} + 6\times \frac{2}{7})$ = 50 : 27
Percentage of chocolate in new mixture = $\frac{\text{chocolate}}{\text{chocolate + milk}} \times 100$
= $\frac{50}{(50 + 27)} \times 100$
= 64.93%
= 65% (approx)
Hence, the correct answer is 65%.

Hello Aspirant,

The most important topic of IIT JAM in Chemistry are:-

Physical Chemistry:-

1. Solid State

2. Quantum Chemistry

3. Electrochemistry

4. Chemistry Kinetics

5. Thermodynamics

Inorganic Chemistry:-

1. Co-ordination Compounds

2. Chemical Bonding

3. Organometallic Compounds

4. Bio inorganic Chemistry

Organic Chemistry:-

1. Stereo Chemistry

2. Name Reactions

3. Reaction Mechanisms

4. Spectroscopy

All the best for exams!!

Hello aspirant,

It is recommended that candidates make a study plan in order to go over each subject in detail. Using IIT JAM Chemistry books and online practise materials is very crucial. To get a feel for the exam format, solve prior years' question papers. Discussions and group study can help with comprehension.

For more information you can visit our site by clicking on the link given below.

https://university.careers360.com/articles/how-prepare-jam-chemistry

Thank you

Hope this information helps you.

Hello aspirant,

The most crucial need for passing the IIT JAM MA test is having a solid understanding of the fundamentals.

For no more than one month, learn the arithmetic of +1 and +2. This will provide you with a solid basis of really practical formulas.

The majority of the questions come from real analysis and linear algebra, thus those are the next subjects you should study. Avoid purchasing expensive books with flashy titles as they are not required for IIT JAM. Recommendations for books in your college course should be followed because they are based on the subjects and information that are genuinely required.

Some of the books I can recommend you are:

1. Calculus - Thomas Finney
2. Real Analysis - Bartle and Sherbet
3. Linear Algebra - Serge Lang
4. Probability - Sheldon Ross

Thank you

Hope it helps you