JEE Main Answer Key 30 January 2024 Shift 1: The National Testing Agency (NTA) held the JEE Main Jan 30 Shift 1 exam from 9 AM to 12 PM. The ongoing JEE Main 2024 Session 1 examination commenced on Jan 24 and will conclude on Feb 1, 2024. The result for the JEE Main 2024 Session 1 will be released in the month of February.
Candidates who appeared for the Jan 30 Shift 1 JEE Main 2024 exam and who are eager to analyse their performances will be able to access the unofficial JEE Main Answer Key 30 January 2024 Shift 1 once available.
Likewise, candidates who attended the January 30 JEE Main Shift 1 Exam can also check the JEE Main Question Paper 30 January 2024 Shift 1 and JEE Main Question Paper Analysis 30 January 2024 Shift 1 which will be updated soon.
Also Read: JEE Main Shift 2 Answer Key 29 January 2024
JEE Main Answer Key 30 January 2024 Shift 1
The memory based questions and answer key for the JEE Main 2024 30 January 2024 Shift 1 will be updated below:
| JEE Main Answer Key 30 January 2024 Shift 1 |
| Physics |
- The electro static potential due to an electron at a distance r varies as?
Ans: 1/r²
- Find the temperature at which the r.m.s velocity of hydrogen molecule is equal to that of oxygen molecule at 47°C.
Ans: 20°C
- The Young's modulus of a material of length L and cross sectional area A is given by 'Y". What will the Young's modulus be if the length is doubled and cross sectional area is halved?
Ans: Y
- A particle of mass m is projected at an angle of 30° with initial velocity u. Find its angula momentum about point of projection at maximum height.
Ans: √3/6 (mv3/g)R
- Work function of a metal is 3 eV. Find its threshold wavelength.
Ans: 41 wA
- What is the ratio of magnitude of the kinetic energy to potential energy of an electron in the 5th orbit of hydrogen atom?
Ans: -1:2
- Two current carrying ring (radius R) are perpendicular to each other and their centres coincide. Then, find magnetic field at centre 'O'.
Ans: μ0I/(√2R)
- In a convex lens the distance between object and image is 45 cm, and magnification produced by lens is two. Find focal length of the lens.
Ans: 10cm
- Find the potential difference Vo across the 700 Ohm resistance. A diagram was given in which three resistances 3.5 kOhm, 2 Ohm, and 700 Ohm are connected in series across a 7 V battery.
Ans: 1.1 V
- Find the acceleration of a 2 kg block on a fixed inclined surface at 37° with the horizontal. The block is tied with a rope that passes over two pulleys (represented through a diagram) such that pulley 1 rests at the top of the inclined surface and pulley 2 carries a weight of 4 kg. Neglect friction.
Ans: 4g/15
|
| Chemistry |
- Find out the maximum number of hybrid orbitals formed when 2s and 2p orbitals are mixed.
Ans: 4
- Find out the sum of the coefficients of all the species involved in the balanced equation: 2MnO4 + I- → (in the presence of a slightly alkaline medium) → Product
Ans: 9
- Find out the work done in Joules for the cyclic process ABCA such that PA = 30 kPa, VA = 10 dm3, Pg = 10 kPa, Vg = 30 dm3, Pc = 10 kPa, Vc= 10 dm3 (as per the given graph).
Ans: 1: 200 J
- What is the geometry of Aluminium chloride in an aqueous solution?
Ans: Octahedral
- If a 250 mL solution of CH3COONa of molarity 0.35 M is to be prepared, what is the mass of CH3COONa required in grams? Round off the answer to the nearest integer.
Ans: 7
- Which of the following sets contain both diamagnetic ions?
Ans: Cu+, Zn2+
- Which of the following compounds does not pass the Fehling Test
Ans: Sucrose
- Identify the given reaction. C6H6-C=O-CI -> (in the presence of H2, Pd/BaSO4) -> Product
Ans: Rosenmund Reaction
- Statement I: For hydrogen atoms, 3p and 3d are degenerate. Statement II: Degenerate orbitals have the same energy.
Ans: Both statements I and II are correct.
- What is the group number of unununnium?
Ans: 1
- The number of atoms in a silver plate having an area of 0.05 cm2 and a thickness of 0.05 cm is m x 1019. If the density of silver is 7.9 g/cm3, find the value of m.
Ans: 11
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Mathematics
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- Let (a, ẞ, y) be the foot of perpendicular form the point (1,2,3) on the line (x+3)/5 = (y-1)/2 = (z+4)/3. Find (a+ẞ+y).
Ans: 5.8
- In an arithametic progression, the sum of the first 20 numbers in 790 and the first 10 numbers is 145. Find S15-S5
Ans: 395
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Candidates must further note that the JEE Main Answer Key 30 January 2024 Shift 1 available here is purely unofficial and contains answers to those questions which were collected from the students who attended the exam.
As the National Testing Agency (NTA) concludes the JEE Main Session 1 Exams 2024 on Feb 1, 2024, candidates can expect the provisional JEE Main Answer Key 2024 to be out by first week of February 2024. The official answer key will contain the correct answers to all the questions asked across the shifts. Once the provisional answer key releases, candidates will be given a chance to raise objections.
Considering all the objections, NTA will release the JEE Main Session 1 Final Answer Key 2024 along with the JEE Main 2024 Results. Further, the JEE Main 2024 Session 2 exam will be conducted in April.