JEE Main DPP 28 November 2024: Daily practice problems for 2025 aspirants

JEE Main DPP 28 November 2024

JEE Main DPP 28 November 2024: 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 DPP 28 November 2024, including five questions from each subject: Mathematics, Physics, and Chemistry.

Also Read | NEET Daily Practice Questions 28 November 2024: DPP for 2025 aspirants

JEE Main DPP 28 November 2024: Physics

Candidates can check out the JEE Main DPP 28 November 2024 daily practice problems for 2025 aspirants from the Physics section:

Question 1: Sound travels in a mixture of two moles of helium and n moles of hydrogen. If rms speed of gas molecules in the mixture is (2)^½ times the speed of sound, then the value of n will be

(A) 1

(B) 2

(C) 3

(D) 4

Answer (B)

Question 2: An object is taken to a height above the surface of earth at a distance 5/4 R from the centre of the earth. Where radius of earth, R = 6400 km. The

percentage decrease in the weight of the object will be

(A) 36%

(B) 50%

(C) 64%

(D) 25%

Answer (A)

Question 3: A bag of sand of mass 9.8 kg is suspended by a rope. A bullet of 200 g travelling with speed 10 ms–1 gets embedded in it, then loss of kinetic energy will be

(A) 4.9 J

(B) 9.8 J

(C) 14.7 J

(D) 19.6 J

Answer (D)

Question 4: The maximum error in the measurement of resistance, current and time for which current flows in an electrical circuit are 1%, 2% and 3% respectively. The maximum percentage error in the detection of the dissipated heat will be

(A) 2

(B) 4

(C) 6

(D) 8

Answer (D)

Question 5: In a potentiometer arrangement, a cell of emf 1.20 V gives a balance point at 36 cm length of wire. This cell is now replaced by another cell of emf 1.80 V. The difference in balancing length of potentiometer wire in above conditions will be ___ cm

(A) 16

(B) 18

(C) 20

(D) 24

Answer (B)

JEE Main DPP 28 November 2024: Chemistry

Candidates can check out the JEE Main DPP  28 November 2024 daily practice problems for 2025 aspirants from the Chemistry section:

Question 1: The correct order of density is

(A)  Be > Mg > Ca > Sr

(B) Sr > Ca > Mg > Be

(C) Sr > Be > Mg > Ca

(D) Be > Sr > Mg > Ca

Answer (C)

Question 2: Match List I with List II.

Choose the correct answer from the options given below:

(A)   A-II, B-III, C-IV, D-I

(B)   A-IV, B-III, C-II, D-I

(C)   A-III, B-II, C-I, D-IV

(D)   A-III, B-II, C-IV, D-I

Answer (C)

Question 3: Some drugs bind to a site other than the active site of an enzyme. This site is known as

(A) Non- active site

(B) Allosteric site

(C) Competitive site

(D) Therapeutic site

Answer (B)

Question 4: Match List I with List II:

Choose the correct answer from the options given below:

(A) A-III, B-I, C-IV, D-II

(B) A-III, B-IV, C-I, D-II                                                              –

(C) A-II, B-I, C-IV, D-III

(D) A-II, B-IV, C-I, D-III

Answer (B)

Question 5: In base vs. acid titration, at the end point methyl orange is present as

(A) quinonoid form

(B) heterocyclic form

(C) phenolic form

(D) benzenoid form

Answer (A)

JEE Main DPP 28 November 2024: Mathematics

Candidates can check out the JEE Main DPP 28 November 2024 daily practice problems for 2025 aspirants from Maths section:

Problem 1: A circle C1 passes through the origin O and has diameter 4 on the positive x-axis. The line y = 2x gives a chord OA of circle C1. Let C2 be the circle with OA as a diameter. If the tangent to C2 at the point A meets the x-axis at P and y-axis at Q, then QA : AP is equal to

(A) 1 : 4

(B) 1 : 5

(C) 2 : 5

(D) 1 : 3

Solution (A)

Problem 2: If the length of the latus rectum of a parabola, whose focus is (a, a) and the tangent at its vertex is x + y = a, is 16, then |a| is equal to :

(A) 2(2)^½

(B) 4(2)^½

(C) 6(2)^½

(D) 4

Solution (B)

Problem 3: Let X have a binomial distribution B(n, p) such that the sum and the product of the mean and variance of X are 24 and 128 respectively. If P(X > n – 3) =k/2^n , then k is equal to :

(A) 528

(B) 529

(C) 629

(D) 650

Solution (B)

Problem 4: A six faced die is biased such that 3 × P (a prime number) = 6 × P (a composite number) = 2 × P (1).

Let X be a random variable that counts the number of times one gets a perfect square on some throws of this die. If the die is thrown twice, then the mean of X is :

(A) 3/11

(B) 5/11

(C) 7/11

(D) 8/11

Solution (D)

Problem 5: The area of a region bounded by Y<=4x^2 , X^2<=9y, and y<=4 is equal to

(A) 40/3

(B) 56/3

(C) 112/3

(D) 80/3

Solution (A)