JEE Main Shift 2 Answer Key 31 January 2024

JEE Main Shift 2 Answer Key 31 January 2024: NTA, the conducting body for the JEE Mains 2024, conducted the exam today, Jan 31. For the exam conducted in the 2nd shift - 2:30 PM to 5:30 PM, the JEE Main Shift 2 Answer Key 31 January 2024 for memory-based questions is available.

The NTA will be releasing the official JEE Main Session 1 Answer Key 2024 once the exam concludes on Feb 1. Candidates will be able to download the answer key for the shift for which they appeared and assess their performance. However, until the official answer key has been released, candidates can use the unofficial answer key to assess their performance.

Also Read: JEE Main Shift 2 Question Paper 31 January 2024

Download Link for JEE Main Shift 2 Answer Key 31 January 2024

To download the JEE Main Shift 2 Answer Key 31 January 2024, follow the link given below:

Memory Based JEE Main Shift 2 Answer Key 31 January 2024

Candidates must refer to the based memory  JEE Main Shift 2 Answer Key 31 January 2024 for reference.

Q1. Statement I: Sg diproportionates into H2S2O3 and S₂ in alkaline medium

Statement II: CIO₄ undergoes disproportionation in acidic medium

1. Statement I is correct but Statement Il is incorrect
2. Statement I is incorrect but Statement Il is correct
3. Both Statement I and Statement II are correct
4. Both Statement I and Statement II are incorrect

Ans. A

Q2. Which of the following is correct?

1. [NiCl4]2- - diamagnetic, [Ni(CO) 4] - diamagnetic
2. [Ni(CO)4] - diamagnetic, [NiCl4]2- - paramagnetic
3. [NiCl4]2 - paramagnetic, [Ni(CO)] - paramagnetic
4. [NiCl4]2 - paramagnetic, [Ni(CO)] - diamagnetic

Ans. B

Q3. Half life of a first order reaction is 36 hr. Find out time (in hour) required for concentration of reactant to get reduced by 90%.

Ans. 120

Q4. Which of the following has maximum ionic character?

1. KCI
2. AgCl
3. CaCl₂
4. BaCl2

Ans. A

Q5. The period of oscillation of system shown below is π αΜ/5K' then a is

Ans. 12

Q6. For the block shown, F₁ is the minimum force required to move block upward and F₂ is the minimum force required to prevent it from slipping find

Ans. B

Q7. Force on a particle moving in straight line is given by F = 6t²î - 3tî and velocity is = 3t²î + 6tĵ. Find power at t = 2 :

Ans. A

Q8. Unpolarised light incident on transparent glass at incident angle 60°. If reflected ray is completely polarized, then angle of refraction is

• 45°
• 60°
• 30°
• 37°

Ans. C

Q9. If~a=sin^{-1}(sin~5) b=cos^{-1}(cos~5) then a² + b² is equal to:

• 8\pi^{2}-40\pi+50
• 4\pi^{2}+25
• 8π2 - 50
• 8\pi^{2}+40\pi+50

Ans. A

Q10. A coin is biased such that head has two chances the tails, what is the probability of getting 2 heads and 1 tail?

• 1-29
• 2/20
• 119
• 419

Ans. D

Q11. If 2nd, 8th, 44th terms of A.P. are 1st, 2nd and 3rd terms respectively of G.P. and first term of A.P. is 1, then the sum of first 20 terms of A.P. is:

1. 970
2. 916
3. 980
4. 990

Ans. A

The JEE Main Session 1 Exam 2024 will be further conducted on Feb 1, 2024. Once the session concludes, the official answer key along with the question paper and candidate's response sheet will be released soon on the official website.

Furthermore, candidates must refer to the JEE Main Question Paper 31 January 2024 Shift 1 and JEE Main Answer Key 31 January 2024 Shift 1 to draw a comparison between the difficulty level of both the shifts.

Also Read: JEE Main Shift 2 Paper Analysis 31 January 2024