Recent questions tagged jee advanced 2019

+1 vote

1 answer

Let x ∈ R and let P = [(1,1,1),(0, 2, 2), (0, 0, 3)], Q = [(2, x, x),(0, 4, 0),(x, x ,6)] and R = PQP^–1.

asked Apr 4, 2019 in JEE by kratos

+1 vote

1 answer

Number of *–O bond in S2O8^2– and number of *–* bond in Rhombic sulphur are respectively:

asked Apr 1, 2019 in Class 12 by kratos

+2 votes

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Suppose f(x) is differentiable at x = 1 and lim(h→0)1/h(f(1+ h)) = 5,

asked Mar 31, 2019 in JEE by kratos

+2 votes

1 answer

The only CORRECT combination that gives two different carboxylic acids is

asked Mar 31, 2019 in Class 12 by kratos

+1 vote

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Let f : R→R be given by f(x) = (x – 1)(x – 2) (x – 5). Define F(x) = ∫f(t)dt, [x ∈ 0, x], x > 0.

asked Mar 30, 2019 in JEE by kratos

+1 vote

1 answer

According to Bohr’* model of the atom, an electron can revolve around the atomic nucleus in a suitable orbit without emitting energy if its orbit

asked Mar 30, 2019 in Class 12 by kratos

+3 votes

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A triangular medium has varying refracting index n = n0 + ax, where x is the distance (in cm) along x– axis from origin and n0 = 4/3 .

asked Mar 29, 2019 in JEE by kratos

+3 votes

1 answer

A radioactive nuclei with decay constant 0.5/* is being produced at a constant rate of 100 nuclei/*.

asked Mar 29, 2019 in Physics by kratos

+1 vote

1 answer

A sample containing same number of two nuclei A and B start decaying . The decay constant of A and B are 10λ and λ.

asked Mar 28, 2019 in JEE by kratos

+1 vote

1 answer

Out of H2S2O3, H2S4O6, H2SO5 and H2S2O8 peroxy acids are : (A) H2S2O3, H2S4O6

asked Mar 27, 2019 in Chemistry by kratos

+1 vote

1 answer

Prove that ∫dθ/√sinθ x ∫√sinθdθ for θ [0, π/2] = π.

asked Mar 26, 2019 in JEE by kratos

+3 votes

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In a thermodynamic process on an ideal monatomic gas, the infinitesimal heat absorbed by the gas is given by TΔX, where

asked Mar 24, 2019 in JEE by kratos

+3 votes

1 answer

Box B1 contains 3 white and 5 red *****, and box B2 contains 6 white and 4 red *****. A box is selected based on the outcome

asked Mar 23, 2019 in JEE by kratos

+1 vote

1 answer

Let M= [(sin^4θ ,- 1-sin^2θ)(1+cos^2θ , cos^4θ)] =lα+βM^-1

asked Mar 22, 2019 in JEE by kratos

+2 votes

1 answer

The value of sec^-1 (1/4 ∑ k ∈ [k = 0, 10] sec (7π/12 + kπ/12) sec(7π/12 + (k+1)π/2)) in the interval [- π/4, 3π/4] equals ___

asked Mar 22, 2019 in JEE by kratos

+3 votes

1 answer

A cylindrical capillary tube of 0.2 mm radius is made by joining two capillaries T1 and T2 of different materials having water

asked Mar 18, 2019 in JEE by kratos

+2 votes

1 answer

If function y = f(x) has only two points of discontinuities say x1 , x2 , where x1 , x2 < 0, then find the number of

asked Mar 17, 2019 in JEE by kratos

+3 votes

1 answer

If l = 2/π∫dx/ (1+esinx)(2-cos2x) ; x∈ (-π/4→π/4) than 27 l^2 equals ____

asked Mar 15, 2019 in JEE by kratos

+1 vote

1 answer

An electric dipole with dipole moment p0/√2(i + j) An electric dipole with dipole moment uniform electric field of magnitude E0.

asked Mar 11, 2019 in JEE by kratos

+2 votes

1 answer

Colour of the bead in borax bead test is mainly due to the formation of

asked Mar 10, 2019 in Class 12 by kratos

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