JEE Main 2025 DPP: Daily Practice Questions (17 January 2025) with Answers - Boost Your Preparation

JEE Main Session 1 2025 is scheduled from January 22 to 30. To excel, applicants should practice JEE Main sample papers regularly.

Here are daily practice questions for JEE Main DPP on 17 January 2025, featuring five questions each from Mathematics, Physics, and Chemistry, along with answers. These will help improve problem-solving speed and accuracy.

JEE Main Daily Practice Questions: Mathematics (17 January 2025)

Problem 1: Using all the letters of the word MATHS, then rank of the word THAMS is

(1) 101

(2) 102

(3) 103

(4) 104

Solution (3)

Problem 2: Let mean and variance of the data 1, 2, 4, 5, x, y are 5 and 10 respectively. Then mean deviation about the mean of data is

(1)  5/2

(2)  4/2

(3)  9/2

(4)  7/2

Solution (1)

Problem 3: If a+b+c+d=11(a,b,c,d >0) then the maximum value of a^5b^3c^2d=3750b, then the value of b is

(1) 90

(2) 115

(3) 120

(4) 125

Solution (1)

Problem 4: A circle with center at (2, 0) and maximum radius “r” is inscribed in the ellipse in the ellipse x^2/36+y^2/9=1, the value of 12r^2 is

(1)  108

(2)  172

(3)  84

(4)  92

Solution (4)

Problem 5: If the ratio of three consecutive terms is 1:3:5 in the expansion of (1 + x)n+2. Then sum of consecutive terms is

(1) 41

(2) 64

(3) 63

(4) 43

Solution (3)

JEE Main Daily Practice Questions: Physics (17 January 2025)

Question 1: A transformer operating at primary voltage 8 kV and secondary voltage 160 V serves a load of 80 kW. Assuming the transformer to be ideal with purely resistive load and working on unity power factor, the loads in the primary and secondary circuit would be

(A) 800 ohms and 1.06 ohms

(B) 10 ohms and 500 ohms

(C) 800 ohms and 0.32 ohms

(D) 1.06 ohms and 500 ohms

Answer (C)

Question 2: Sun light falls normally on a surface of area 36 cm2 and exerts an average force of 7.2 × 10–9 N within a time period of 20 minutes. Considering a case of complete absorption, the energy flux of incident light is

(A) 25.92 × 102 W/cm2

(B) 8.64 × 10–6 W/cm2

(C) 6.0 W/cm2

(D) 0.06 W/cm2

Answer (D)

Question 3: The power of a lens (biconvex) is 1.25 m–1 in particular medium. Refractive index of the lens is 1.5 and radii of curvature are 20 cm and 40 cm respectively. The refractive index of surrounding medium

(A) 1.0

(B) 9/7

(C) 3/2

(D) 4/3

Answer (B)

Question 4: A radioactive sample decays 7/8 times its original quantity in 15 minutes. The half-life of the sample is

(A)  5 min

(B) 7.5 min

(C) 15 min

(D) 30 min

Answer (A)

Question 5: Two streams of photons, possessing energies equal to five and ten times the work function of metal are incident on the metal surface successively. The ratio of maximum velocities of the photoelectron emitted, in the two cases respectively, will be

(A) 1 : 2

(B) 1 : 3

(C) 2 : 3

(D) 3 : 2

Answer (C)

JEE Main Daily Practice Questions: Chemistry (17 January 2025)

Question 1: Dinitrogen and dioxygen, the main constituents of air do not react with each other in atmosphere to form oxides of nitrogen because

(A) N2 is unreactive in the condition of atmosphere

(B) Oxides of nitrogen are unstable

(C) Reaction between them can occur in the presence of a catalyst

(D) The reaction is endothermic and requires very high temperature

Answer (D)

Question 2: Arrange the following in increasing order of reactivity towards nitration

A.  p-xylene

B.  bromobenzene

C. mesitylene

D. nitrobenzene

E. benzene

(A)  C < D < E < A < B

(B) D < B < E < A < C

(C) D < C < E < A < B

(D) C < D < E < B < A

Answer (B)

Question 3: Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R

Assertion A: Permanganate titrations are not performed in presence of hydrochloric acid.

Reason R: Chlorine is formed as a consequence of oxidation of hydrochloric acid.

In the light of the above statements, choose the most appropriate answer from the options given below

(A) Both A and R are correct and R is the correct explanation of A

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

(C) A is correct but R is not correct

(D) A is not correct but R is correct

Answer (A)

Question 4: Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R

Assertion A : Aniline on nitration yields ortho, meta & para nitro derivatives of aniline.

Reason R : Nitrating mixture is a strong acidic mixture.

In the light of the above statements, choose the correct answer from the options given below.

(A) Both A and R are true and R is the correct explanation of A

(B) Both A and R are true but R is NOT the correct explanation of A

(C) A is true but R is false

(D) A is false but R is true

Answer (A)

Question 5: Statement-I: Action of an enzyme can be blocked only when an inhibitor blocks the active site of the enzyme.

Statement-II: An inhibitor can form a strong covalent bond with the enzyme.

In the light of the above statements, choose the correct answer from the options given below:

(A) Both Statement-I and Statement-II are true

(B) Both Statement-I and Statement-II are false

(C) Statement-I is true but Statement-II is false

(D) Statement-I is false but Statement-II is true

Answer (D)

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