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## JEE Main 2020 (Online) 7th January Evening Slot

Exam Held on Tue Jan 07 2020 09:30:00 GMT+0000 (Coordinated Universal Time)
Click View All Questions to see questions one by one or you can choose a single question from below.

## Chemistry

Consider the following reactions : <img src="https://imagex.cdn.examgoal.net/7k9...
For the reaction <br>2H<sub>2</sub>(g) + 2NO(g) $$\to$$ N<sub>2</sub>(g) + 2H<...
The correct order of stability for the following alkoxides is :<br><br> <img src...
In the following reaction products (A) and (B) respectively, are :<br><br> NaOH ...
The bond order and the magnetic characteristics of CN<sup>-</sup> are :
The equation that is incorrect is :
The number of possible optical isomers for the complexes MA<sub>2</sub>B<sub>2</...
For the following reactions<br><br> <img src="https://imagex.cdn.examgoal.net/7k...
Indentify the correct labels of A,B and C in the following graph from the option...
Two open beakers one containing a solvent and the other containing a mixture of ...
The redox reaction among the following is :
A chromatography column, packed with silica gel as stationary phase, was used to...
The refining method used when the metal and the impurities have low and high mel...
Which of the following statements is correct ?
The ammonia (NH<sub>3</sub>) released on quantiative reaction of 0.6 g urea (NH<...
Among the statements (a) - (d), the correct ones are :<br> (a) Decomposition of ...
Within each pair of elements F &amp; Cl, S &amp; Se, and Li &amp; Na, respective...
Among the statements(a)-(d) the incorrect ones are :<br> (a) Octahedral CO(III) ...
In the following reaction sequence,<br><br> <img src="https://imagex.cdn.examgoa...
In the following reactions sequence, structure of A and B respectively will be :...
Consider the following reactions :<br><br> $$NaCl{\rm{ }} + {\rm{ }}{K_2}C{r_2}{... The standard heat of formation$$\left( {{\Delta _f}H_{298}^0} \right)$$of etha... 3 g of acetic acid is added to 250 mL of 0.1 M HCL and the solution made up to 5... The number of sp<sup>2</sup> hybridised carbons present in "Aspartame" is The flocculation value of HCl for arsenic sulphide sol. <br>is 30 m mol L<sup>-1... ## Mathematics If 3x + 4y = 12$$\sqrt 2 $$is a tangent to the ellipse <br>$${{{x^2}} \over {{a...
In a workshop, there are five machines and the probability of any one of them to...
The value of $$\alpha$$ for which <br>$$4\alpha \int\limits_{ - 1}^2 {{e^{ - \... The number of ordered pairs (r, k) for which <br>6.<sup>35</sup>C<sub>r</sub> =... The coefficient of x<sup>7</sup> in the expression <br>(1 + x)<sup>10</sup> + ... Let$${a_1}$$,$${a_2}$$,$${a_3}$$,....... be a G.P. such that <br>$${a_1}$$... The locus of the mid-points of the perpendiculars drawn from points on the line,... Let$$\alpha $$and$$\beta $$be the roots of the equation x<sup>2</sup> - x -... Let A, B, C and D be four non-empty sets. The contrapositive statement of "If A ... The area (in sq. units) of the region <br>{(x, y)$$ \in $$R<sup>2</sup> | 4x<s... Let$$\overrightarrow a $$,$$\overrightarrow b $$and$$\overrightarrow c $$... Let A = [a<sub>ij</sub>] and B = [b<sub>ij</sub>] be two 3 × 3 real matrices suc... Let y = y(x) be the solution curve of the differential equation, <br>$$\left( {{...
If the sum of the first 40 terms of the series, <br>3 + 4 + 8 + 9 + 13 + 14 + 18...
The value of c in the Lagrange's mean value theorem for the function <br>ƒ(x) = ...
Let the tangents drawn from the origin to the circle, <br>x<sup>2</sup> + y<sup...
Let y = y(x) be a function of x satisfying <br>$$y\sqrt {1 - {x^2}} = k - x\sq... If$$\theta $$<sub>1</sub> and$$\theta $$<sub>2</sub> be respectively the sma... If$${{3 + i\sin \theta } \over {4 - i\cos \theta }}$$,$$\theta  \in $$[0... Let X = {n$$ \in $$N : 1$$ \le $$n$$ \le $$50}. If <br>A = {n$$ \in $$X:... Let ƒ(x) be a polynomial of degree 5 such that x = ±1 are its critical points. <... If the foot of the perpendicular drawn from the point (1, 0, 3) on a line passin... If the system of linear equations, <br>x + y + z = 6 <br>x + 2y + 3z = 10 <br>3x... If the mean and variance of eight numbers 3, 7, 9, 12, 13, 20, x and y be 10 and... If the function ƒ defined on$$\left( { - {1 \over 3},{1 \over 3}} \right)$$by ... ## Physics The activity of a radioactive sample falls from 700 s<sup>–1</sup> to 500 s<sup>... An electron (of mass m) and a photon have the same energy E in the range of a fe... Mass per unit area of a circular disc of radius$$a$$depends on the distance r ... In the figure, potential difference between A and B is : <img src="https://image... A particle of mass m and charge q has an initial velocity$$\overrightarrow v =...
An emf of 20 V is applied at time t = 0 to a circuit containing in series 10 mH ...
<img src="https://imagex.cdn.examgoal.net/7k9k2k5f6f69b/a9d967a4-0546-4862-960f-...
A planar loop of wire rotates in a uniform magnetic field. Initially at t = 0, t...
Two ideal Carnot engines operate in cascade (all heat given up by one engine is ...
A mass of 10 kg is suspended by a rope of length 4 m, from the ceiling. A force ...
In a building there are 15 bulbs of 45 W, 15 bulbs of 100 W, 15 small fans of 10...
The dimension of $${{{B^2}} \over {2{\mu _0}}}$$, where B is magnetic field and ...
An elevator in a building can carry a maximum of 10 persons, with the average ma...
A stationary observer receives sound from two identical tuning forks, one of whi...
A thin lens made of glass (refractive index = 1.5) of focal length f = 16 cm is ...
The electric field of a plane electromagnetic wave is given by <br>$$\overrighta... Under an adiabatic process, the volume of an ideal gas gets doubled. Consequentl... In a Young's double slit experiment, the separation between the slits is 0.15 mm... An ideal fluid flows (laminar flow) through a pipe of non-uniform diameter. The ... A box weight 196 N on a spring balance at the north pole. Its weight recorded on... A 60 pF capacitor is fully charged by a 20 V supply. It is then disconnected fro... The sum of two forces$$\overrightarrow P $$and$$\overrightarrow Q $$is$$\...
<img src="https://imagex.cdn.examgoal.net/7k9k2k5fde6lr/13bf7d0d-e687-4859-9e80-...
The balancing length for a cell is 560 cm in a potentiometer experiment. When an...
M grams of steam at 100<sup>o</sup>C is mixed with 200 g of ice at its melting p...

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