JEE Main Daily Practice Questions 17 January 2025:
JEE Main Session 1 2025 will take place from January 22 to 31. Applicants preparing for the exam must focus on practising the JEE Main sample papers. Hence, here are some daily practice questions with answers for JEE Main 17 January 2025, including five questions from each subject: Mathematics, Physics, and Chemistry.
Also Read |
NEET Daily Practice Questions 17 January 2025
JEE Main Daily Practice Questions 17 January 2025: Physics
Candidates can check out the JEE Main daily practice questions 17 January 2025 from the Physics section:
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 17 January 2025: Chemistry
Candidates can check out the JEE Main daily practice questions 17 January 2025 from the Chemistry section:
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)
JEE Main Daily Practice Questions 17 January 2025: Mathematics
Candidates can check out the JEE Main daily practice questions 17 January 2025 from the Maths section:
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)