JEE Main 2024 Question Paper February 1 Shift 1 (Available): PDF download Physics, Chemistry and Mathematics

JEE Main 2024 Question Paper February 1 Shift 1

JEE Main 2024 Question Paper February 1 Shift 1: The National Testing Agency (NTA) has conducted the first shift of the last day, Day 5, of JEE Main 2024 Session 1 exam on February 1, 2024, in online mode. For the same, the memory-based questions of JEE Main 1 February 2024 B.Tech Paper 1 exam will be shared here. Candidates may refer to it to cross-check their answers to estimate their scores or to solve them as practice questions for the next session.
The preliminary reviews of the students again stated the exam to be Moderate with Mathematics being the toughest and trickiest subject. It had a difficulty level of 'Moderate to Tough'. The detailed analysis can be checked here: JEE Main Exam Analysis 1 February 2024 Shift 1 .

JEE Main 2024 Question Paper February 1 Shift 1

The PDF links to download JEE Main 2024 question paper for the February 1 Shift 1 exam will soon be added here for all subjects. The memory-based questions will be added here. Its detailed answer key is available here: JEE Main 2024 February 1 Answer Key .

JEE Main Physics Question Paper 2024 February 1 Shift 1

The memory-based questions for JEE Main 1 Feb 2024 Shift 1 Physics subject are as follows:

1. Determine the lowest energy of a photon emitted in the Balmer Series of a hydrogen atom.
2. De Broglie wavelength of a proton is λ and that of an α particle is 2λ. Find the ratio of the velocity of the proton to that of α particle.
3. What are the dimensions of an angular impulse?
4. A vernier calliper has 10 main scale divisions coinciding with 11 vernier scale divisions equals 5 mm. What is the least count of the device?
5. On increasing temperature, the elasticity of a material will:
   i. Increase
   ii. Decrease
   iii. Remain constant
   iv. May increase or decrease
6. 2 moles of a monoatomic gas and 6 moles of a diatomic gas are mixed. Find the molar-specific heat for a constant volume of the mixture if R represents the universal gas constant.
7. A gas undergoes a thermodynamic process from state (P ₁ , V ₁ , T ₁ ) to state (P ₂ , V ₂ , T ₂ ). If for the given process PV ^3/2 = constant, find the work done by the gas.
8. Two particles, each of mass 2 kg are placed in the x - y plane such that m _x is 4 m on the negative x-axis and m _y is 4 m on the positive y-axis. If the distance of the centre of mass from the origin is [ (4√2)/x ], find x.
9. If a bullet of mass 10 ^-2 kg and velocity 200 m/s gets embedded inside the bob of mass 1 kg of a simple pendulum, then what will be the maximum height that the system rises by in cm?
10. The length of a seconds pendulum, if it is placed at height 2R (where R = the radius of the earth) from the surface of the earth, is [ 10/xπ ² ] m. Find x.

JEE Main Chemistry Question Paper 2024 February 1 Shift 1

The memory-based questions for JEE Main 1 February 2024 Shift 1 Chemistry subject are as follows:

1. Find out the total possible optical isomers of 2-chlorobutane.
2. The total number of deactivating groups among the following is:
   -CN, -NH-CO-CH ₃ , -CO-CH ₃ , -NH-CH ₃
3. In Kjeldahl's estimation of nitrogen, CuSO4 acts as:
   i. Oxidising Agent
   ii. Reducing Agent
   iii. Catalyst
   iv. Reagent
4. We are given with following cell reaction:
   2H ⁺ + 2 e ^- → H ₂
   P _H2 = 2 atm
   [H ⁺ ]= 1M
   (2.303RT / F = 0.06)
   If E _cell of the reaction is given by -x * 10 ^-3 V. Find out x.
5. Which of the following is most likely attacked by an electrophile?
6. Statement I: S ₈ disproportionates into H ₂ S ₂ O ₃ and S ₂ ^- in an alkaline medium.
   Statement II: CIO ₄ ^- undergoes disproportionation in an acidic medium
   i. Both statements I and II are correct.
   ii. Both statements I and II are incorrect.
   iii. Statement I is correct and statement II is incorrect.
   iv. Statement I is incorrect and statement Il is correct.
7. Match the following:
   Column 1: i. [Cr(H ₂ O) ₆ ] ³⁺ , ii. [Fe(H ₂ O) ₆ ] ³⁺ , iii. [Ni(H ₂ O) ₆ ] ²⁺ , iv. [V(H ₂ O) ₆ ] ³⁺
   Column 2: a. t _2g ² eg ⁰ , b. t _2g ³ eg ⁰ , c. t _2g ³ eg ² , d. t _2g ⁶ eg ²
8. Statement I: PH ₃ will have a lower boiling point than NH ₃ .
   Statement II: There are strong van der Waals forces in NH ₃ and strong hydrogen bonding in PH ₃ .
   i. Both statements I and II are correct.
   ii. Both statements I and II are incorrect.
   iii. Statement I is correct and statement II is incorrect.
   iv. Statement I is incorrect and statement Il is correct.
9. What is the pH of CH ₃ COONH ₄ ⁺ ? (At 25°C)
   Given: K _a of CH ₃ COOH = 1.8 x 10 ^-5 , K _b of NH ₄ OH = 1.8 x 10 ^-5
10. Which of the following is the correct for adiabatic free expansion against vacuum?
    i. q = 0, ΔU = 0, w = 0
    ii. q ≠ 0, w = 0, ΔU = 0
    iii. q = 0, ΔU ≠ 0, w = 0
    iv. q = 0, ΔU ≠ 0, w ≠ 0
11. Which of the following have a trigonal bipyramidal shape?
    PF ₅ , PBr ₅ , [PtCl ₄ ] ^- , SF ₆ , BF ₃ , BrF ₅ , PCl ₅ , [Fe(CO) ₅ ]
12. Complementary stand of DNA ATGCTTCA is:
    i. TACGAAGA
    ii. TACGAAGT
    iii. TAGCAACA
    iv. TAGCTACT
13. 3 NaCl samples have their van't Hoff factor as follows:
    Sample 1 of 0.1 M - i ₁
    Sample 2 of 0.01 M - i ₂
    Sample 3 of 0.001 M - i ₃
    Find the relation between i ₁ , i ₂ , and i ₃ .
14. Cr ₂ O ₇ ^2- + xH ⁺ + ye ^- → 2Cr ³⁺ + AH ₂ O
    Balance the above reaction and find x, y and A.
15. How many oxides are amphoteric in nature?
    SnO ₂ , PbO ₂ , SiO ₂ , P ₂ O ₅ , Al ₂ O ₃ , CO ₂ , CO, NO, N ₂ O

JEE Main Mathematics Question Paper 2024 February 1 Shift 1

The memory-based questions for JEE Main 1 Feb 2024 Shift 1 Maths subject are as follows:

1. If 3, a, b, c are in A.P. and 3, (a - 1), (b + 1) are in G.P., then find the arithmetic mean of a, b and c.
2. If AP ₁ = 3, 7, 11,..., 403 and AP ₂ = 2, 5, 8,..., 401. Find the sum of common terms of AP ₁ and AP ₂ .
3. If (t + 1)dx = (2x + (t + 1) ³ )dt and x(0) = 2, then x(1) = ?
4. Five people are distributed in four identical rooms. A room can also contain zero people. Find the number of ways to distribute them.
5. If 5f(x) + 4f(1/x) = x ² - 4 and y = 9f(x) * x ²
   If y is strictly increasing, then find the interval of x.
6. If the hyperbola x ² - y ² cosec ² θ = 5 and ellipse x ² cosec ² θ + y ² = 5 has eccentricity e _H and e _E respectively and e _H = √7 e _E , then find the value of θ.
7. Let S = {1,2,3,..., 20}
   R ₁ = {(a, b): a divide b},
   R ₂ = {(a, b): a is integral multiple of b} and a, b ∈ S.
   n(R ₁ - R ₂ ) = ?

JEE Main Question Paper 2024 February 1 Shift 1 PDF Link

Find here the links to download the subject-wise JEE Main 2024 question paper prepared by CollegeDekho for 1 February first shift in a PDF format:

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JEE Main Question Paper PDF 1 February 2024 Shift 1 by Coaching Institutes

For Day 4 Shift 1, the subject-wise memory-based questions released by the various top IIT-JEE Main coaching institutes will be updated as and when available: