The second shift of today’s examination was of an overall moderate in difficulty level. However, in this shift, the mathematics section was said to be the toughest by students. Physics was from easy to moderate as per most of the students. Chemistry was still the easiest of all.
JEE Main 2019 Paper 1: Exam Format
Subject |
No of Questions |
Marks |
Mathematics |
30 |
120 |
Chemistry |
30 |
120 |
Physics |
30 |
120 |
Total |
90 |
360 |
Analysis for Physics:
There was more numerical based question in the physics section. More questions were there from 11th CBSE and were found to be tough.
Physics had 6 questions from mechanics and 3 from semiconductors. Also, questions from Relative motion, Convex mirrors were there in physics.
Analysis for Chemistry:
Chemistry section was easiest of all the three. Equal weightage was given to all organic, inorganic and physical chemistry.
There were more questions from organic chemistry Sn1 and Sn2 reactions. Also, the Stratosphere question was reported as the easiest question.
Analysis for Mathematics:
The mathematics section in this shift was the toughest of all. Although, Pattern and difficulty level is the same as the January session.
There were questions from coordinate geometry, 2D And 3D and calculus in maths. Also, the mathematics section had questions from Eclipse, parabola and trigonometry.
JEE Main 2019 Paper 1: Question & Answers
Maths
Qs.1: The length of the focal chord of parabola y square=16x through point P(1.4) on it is
Ans : 25
Qs.2: y=mx+7(3)^1/2 is a normal to the hyperbola (x^2)/24-(y^2)/18 . Then find the value of m?
Chemistry
Qs.1: Arrange in increasing order of oxidation state of the following: N2O, NO, NO2, N2O3, N2O5
Qs.2: Which is a path function?
Ans : heat and work
Qs.3: Floride present in which ore?
Qs.4: RMS speed of a gas at 1atm and 400k is 100m/s then what is the speed of gas at 2atm and 500K?
Qs.5: Aerosol is a colloidal solution of
Ans : solid in gas
Qs.6: In fullerene the structure consist?
Ans : 20-hexagonal and 12-pentagonal rings
Qs.7: Which of the following metal has large difference in its first and second ionization enthalpy a)Ba b) K c) Sr d) Ca
Ans : K
Qs.8: The linkage present in the units of a sucrose molecule is a) (1,2) b) (1.3) c) (1,4) d) (1,6)
Ans : -
Physics
Qs.1: A ring of radius R, disc of radius R/2 and a sphere of radius of R/4 are projected along the inclined plane upward, with the same velocity of center of mass. Assuming pur rolling throughout the motion, find the ratio of heights reached by them.
Ans : 20:15:14
Qs.2: A long current carrying wire having current I1 and a square loop of side carrying current I2 are lying in plane. Find the force on loop due to circle. -
Qs.3: A rope of length 'l', mass M is kept on smooth surface such that (1/n)th part of it is hanging from the surface. Find work done to lift rope on surface
Qs.4: A river is flowing with speed 2km/h. A swimmer who can swim with speed 4km/h in river want to cross the river. At what angle with river he should swim to reach the point directly opposite to the starting point. a)150 b) 90 c) 120 d) 60
Ans : 120
Qs.5: A simple pendulum of time period 'T' seconds, immerse in a liquid of density 1/16th of density of the bob of the pendulum. Find its new time period.
Ans : 4/√15T
Qs.6: The image of an object formed by a concave mirror of focal length 0.4m is errect and 5 times larger. Find the distance of object form in the mirror.
Ans : -0.32
Qs.7: I an YDSE, when we place a glass slob of refractive index μ in front of one of the slit. The Central maxima shifts by n-fringes. Find the thickness of glass slob (Wavelength of light used is λ)
Qs.8: A 5μF capacitor is given charge of 5μC. The its plates are moved slowly apart such that its new capacitance become 2μF. Find work done in the process
Student Reaction:
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