JEE Main 2021 (Online) 27th August Morning Shift

Paper was held on
Fri, Aug 27, 2021 3:30 AM

## Chemistry

In the following sequence of reactions, the final product D is :

View Question The structure of the starting compound P used in the reaction given below is :

View Question Match List - I with List - II :Choose the most appropriate answer from the options given below :

View Question Match items of List-I with those of List-II :
List - I(Property)
List - II(Example)
(a

View Question The major product of the following reaction is :

View Question Which of the following is not a correct statement for primary aliphatic amines?

View Question Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian blue coloured colloi

View Question The nature of oxides V2O3 and CrO is indexed as 'X' and 'Y' type respectively. The correct set of X and Y is :

View Question Out of following isomeric forms of uracil, which one is present in RNA?

View Question Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)

View Question In the following sequence of reactions the P is :

View Question In polythionic acid, H2SxO6 (x = 3 to 5) the oxidation state(s) of sulphur is/are :

View Question In Carius method for estimation of halogens, 0.2 g of an organic compound gave 0.188 g of AgBr. The percentage of bromin

View Question The reaction that occurs in a breath analyser, a device used to determine the alcohol level in a person's blood stream i

View Question The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is equal to $${{{h^2}} \over {xma_0^2}}$$.

View Question 1 kg of 0.75 molal aqueous solution of sucrose can be cooled up to $$-$$4$$^\circ$$C before freezing. The amount of ice

View Question 1 mol of an octahedral metal complex with formula MCl3 . 2L on reaction with excess of AgNO3 gives 1 mol of AgCl. The de

View Question The number of moles of CuO, that will be utilized in Dumas method for estimation nitrogen in a sample of 57.5 g of N, N-

View Question The number of f electrons in the ground state electronic configuration of Np (Z = 93) is ___________. (Nearest integer)

View Question 200 mL of 0.2 M HCl is mixed with 300 mL of 0.1 M NaOH. The molar heat of neutralization of this reaction is $$-$$57.1 k

View Question The number of moles of NH3, that must be added to 2L of 0.80 M AgNO3 in order to reduce the concentration of Ag+ ions to

View Question When 10 mL of an aqueous solution of KMnO4 was titrated in acidic medium, equal volume of 0.1 M of an aqueous solution o

View Question ## Mathematics

Let A be a fixed point (0, 6) and B be a moving point (2t, 0). Let M be the mid-point of AB and the perpendicular bisect

View Question If $${({\sin ^{ - 1}}x)^2} - {({\cos ^{ - 1}}x)^2} = a$$; 0 < x < 1, a $$\ne$$ 0, then the value of 2x2 $$-$$ 1 i

View Question If the matrix $$A = \left( {\matrix{
0 & 2 \cr
K & { - 1} \cr
} } \right)$$ satisfies $$A({A^3} + 3I

View Question If $$S = \left\{ {z \in C:{{z - i} \over {z + 2i}} \in R} \right\}$$, then :

View Question Let y = y(x) be the solution of the differential equation $${{dy} \over {dx}} = 2(y + 2\sin x - 5)x - 2\cos x$$ such tha

View Question Let us consider a curve, y = f(x) passing through the point ($$-$$2, 2) and the slope of the tangent to the curve at any

View Question If $$\alpha$$, $$\beta$$ are the distinct roots of x2 + bx + c = 0, then $$\mathop {\lim }\limits_{x \to \beta } {{{e^{2

View Question When a certain biased die is rolled, a particular face occurs with probability $${1 \over 6} - x$$ and its opposite face

View Question If x2 + 9y2 $$-$$ 4x + 3 = 0, x, y $$\in$$ R, then x and y respectively lie in the intervals :

View Question $$\int\limits_6^{16} {{{{{\log }_e}{x^2}} \over {{{\log }_e}{x^2} + {{\log }_e}({x^2} - 44x + 484)}}dx} $$ is equal to :

View Question A wire of length 20 m is to be cut into two pieces. One of the pieces is to be made into a square and the other into a r

View Question Let $$\overrightarrow a = \widehat i + 5\widehat j + \alpha \widehat k$$, $$\overrightarrow b = \widehat i + 3\widehat

View Question The number of distinct real roots of the equation 3x4 + 4x3 $$-$$ 12x2 + 4 = 0 is _____________.

View Question If A = {x $$\in$$ R : |x $$-$$ 2| > 1}, B = {x $$\in$$ R : $$\sqrt {{x^2} - 3} $$ > 1}, C = {x $$\in$$ R : |x $$-$

View Question If $$\int {{{dx} \over {{{({x^2} + x + 1)}^2}}} = a{{\tan }^{ - 1}}\left( {{{2x + 1} \over {\sqrt 3 }}} \right) + b\left

View Question If the system of linear equations2x + y $$-$$ z = 3x $$-$$ y $$-$$ z = $$\alpha$$3x + 3y + $$\beta$$z = 3has infinitely

View Question Let n be an odd natural number such that the variance of 1, 2, 3, 4, ......, n is 14. Then n is equal to _____________.

View Question A number is called a palindrome if it reads the same backward as well as forward. For example 285582 is a six digit pali

View Question ## Physics

A uniformly charged disc of radius R having surface charge density $$\sigma$$ is placed in the xy plane with its center

View Question Which of the following is not a dimensionless quantity?

View Question If E and H represents the intensity of electric field and magnetising field respectively, then the unit of E/H will be :

View Question The resultant of these forces $$\overrightarrow {OP} ,\overrightarrow {OQ} ,\overrightarrow {OR} ,\overrightarrow {OS} $

View Question A balloon carries a total load of 185 kg at normal pressure and temperature of 27$$^\circ$$C. What load will the balloon

View Question An object is placed beyond the centre of curvature C of the given concave mirror. If the distance of the object is d1 fr

View Question A huge circular arc of length 4.4 ly subtends an angle '4s' at the centre of the circle. How long it would take for a bo

View Question Calculate the amount of charge on capacitor of 4$$\mu$$F. The internal resistance of battery is 1$$\Omega$$ :

View Question Moment of inertia of a square plate of side l about the axis passing through one of the corner and perpendicular to the

View Question An ideal gas is expanding such that PT3 = constant. The coefficient of volume expansion of the gas is :

View Question In a photoelectric experiment, increasing the intensity of incident light :

View Question A bar magnet is passing through a conducting loop of radius R with velocity $$\upsilon $$. The radius of the bar magnet

View Question Two ions of masses 4 amu and 16 amu have charges +2e and +3e respectively. These ions pass through the region of constan

View Question Find the distance of the image from object O, formed by the combination of lenses in the figure :

View Question In Millikan's oil drop experiment, what is viscous force acting on an uncharged drop of radius 2.0 $$\times$$ 10$$-$$5 m

View Question Electric field in a plane electromagnetic wave is given by E = 50 sin(500x $$-$$ 10 $$\times$$ 1010 t) V/m The velocity

View Question Five identical cells each of internal resistance 1$$\Omega$$ and emf 5V are connected in series and in parallel with an

View Question The variation of displacement with time of a particle executing free simple harmonic motion is shown in the figure.The p

View Question A body of mass (2M) splits into four masses (m, M $$-$$ m, m, M $$-$$ m}, which are rearranged to form a square as shown

View Question The alternating current is given by $$i = \left\{ {\sqrt {42} \sin \left( {{{2\pi } \over T}t} \right) + 10} \right\}A$$

View Question A uniform conducting wire of length is 24a, and resistance R is wound up as a current carrying coil in the shape of an e

View Question First, a set of n equal resistors of 10 $$\Omega$$ each are connected in series to a battery of emf 20V and internal res

View Question If the velocity of a body related to displacement x is given by $$\upsilon = \sqrt {5000 + 24x} $$ m/s, then the accele

View Question A rod CD of thermal resistance 10.0 KW$$-$$1 is joined at the middle of an identical rod AB as shown in figure. The end

View Question Two persons A and B perform same amount of work in moving a body through a certain distance d with application of forces

View Question