JEE Mains 21 December Daily Practice Questions for 2025 Session 1 with Solution

JEE Mains 21 December Daily Practice Questions mentioned here (Image Credits: pexels.com).

JEE Mains 21 December Daily Practice Questions for 2025 Session 1 with Solution: On December 21, 2024, the candidates can practice the available questions for Joint Entrance Examination – Main. Candidates can check the JEE Mains 21 December Daily Practice Questions for 2025 Session 1 with Solution for their reference. It is important for the candidates to regularly practice the provided questions as it can help them understand the exam pattern and set their expectations of the main examination. Additionally, it will help the students predict the kind of questions they will be expected to answer in the JEE Main 2025 exam. The JEE Mains 21 December Daily Practice Questions for 2025 Session 1 with Solution is available below.

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JEE Mains 21 December Daily Practice Questions for 2025 Session 1 with Solution

Candidates can go through the JEE Mains 21 December Daily Practice Questions for 2025 Session 1 with Solution provided below.

JEE Mains 21 December Daily Physics Practice Questions for 2025 Session 1 with Solution

Q1. If light with a wavelength of 350 nm is applied to metals A and B. Metals A and B have work functions of 4.8 eV and 2.2 eV, respectively. Next, select the appropriate choice.

Metals B will not emit photo-electrons
Both metals A and B will not emit photo- electrons
Both metals A and B will emit photo-electrons
Metals A will not emit photo-electrons

Answer: (D)

Q2. An object at the bottom of a bucket is the focus of a microscope. The microscope must be raised 30 cm in order to focus the object again if a liquid with a refractive index of 5/3 is poured inside the bucket. The liquid's height in the bucket is

12 cm
18 cm
75 cm
50 cm

Answer: (C)

Q3. The volume of a hypothetical gas increases from 8 to 27 liters due to adiabatical expansion. in the event that the gas's final pressure to starting pressure ratio is 16/81. Next, the Cp/Cv ratio

Answer: (A)

Q4. When subjected to the same stress, wire A, which is 5.0 meters long and has a cross-section of 2.5 x 10-5 m2, extends uniformly by the same amount as wire B, which is 6.0 meters long and has a cross-section of 3.0 x 10-5 m2. The Young's modulus ratio between wires A and B will be

1:4
1:2
1:10
1:1

Answer: (D)

Q5. A 10 kg body is traveling at a starting speed of 20 m/s. Because of the friction between the body and the floor, the body stops after five seconds. The coefficient of friction is (G = ms-2) (Take acceleration due to gravity).

JEE Mains 21 December Daily Chemistry Practice Questions for 2025 Session 1 with Solution

Q1. The component that is crucial to interneuronal transmission and neuromuscular function is

Answer: (C)

Q2. Statement I: The color of a borax bead dipped in cupric sulfate turns green when heated under a bright flame.

Statement II: The development of copper(I) metaborate is what gives the area its green hue. Select the best response from the list below based on the aforementioned statements.

Statement I is false but Statement II is true
Statement I is true but Statement II is false
Both Statement I and Statement II are false
Both Statement I and Statement II are true

Answer: (C)

Q3. : Determine whether the following statements are accurate. A. 0.1 M urea and 0.1 M NaCl will both raise the boiling point temperature of water by the same amount. B. The composition of an azotropic mixture does not change when it boils. C. Osmosis always occurs when a solution goes from being hypertonic to being hypotonic. D. A 32% H2SO4 solution with a molarity of 4.09 M has a density of roughly 1.26 g mL-1. E. Adding KI solution to silver nitrate solution results in a negatively charged sol. From the options below, select the right response.

A and C only
B, D and E only
A, B and D only
B and D only

Answer: (D)

Q4. Assertion (A) and Reason (R) are the names of the two statements that are presented here.

Assertion (A): Group 2 metals have a lower initial ionization enthalpy than elements in the third series.

Reason (R): Subsequent d-orbital filling occurs in a 3D succession of elements. Select the appropriate response from the list below based on the aforementioned statements.

(A) is true but (R) is false
Both (A) and (R) are true and (R) is the correct explanation of (A)
(A) is false but (R) is true
Both (A) and (R) are true but (R) is not the correct explanation of (A)

Answer: (B)

Q5. Put the following orbitals in descending energy order. A. n = 3, 10, m = 0 B. I = 0, m = 0, and n = 4. C. n = 3, 11, m = 0 D. m = 1; n = 3; 1 = 2. For the order, the appropriate choice is

A > C > B > D
B > D > C > A
D > B > A > C
D > B > C > A

Answer: (D)

JEE Mains 21 December Daily Mathematics Practice Questions for 2025 Session 1 with Solution

Q1. Let P be the plane that is perpendicular to the line connecting the points (4,1, -3) and (2, 4, 3) and that passes through the points (1, -1, -5). Consequently, P's separation from the point (3, -2, 2) is

Answer: (C)

Q2. Assume that the class A mean and standard deviation of scores are 40 and k (>0), respectively, and that the class B mean and standard deviation of scores of n students are 55 and 30-k, respectively. The sum of the variances of classes A and B is as follows if the mean and variance of the combined class of 100 + n students' marks are 50 and 350, respectively:

Answer: (D)

Q3. They toss two dice. How likely is it that the total of the dice's numbers will equal eight?

5/36
1/36
1/9
7/36

Answer: (A)

Q4: n2 + n + 15 equals 2n+1Pn-1: 2n-1Pn = 11: 21 if

Answer: (C)

Q5. Let A be the case when two randomly selected real values in the sample space [0, 60] have absolute differences that are less than or equal to a. P (A) = 11/36 indicates that an is equal to

Answer: (A)

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