WB JEE 2017

The structure of the product P of the following reaction is

Reduction of the lactol S with sodium borohydride gives

The reduction of benzene diazonium chloride to phenyl hydrazine can be accomplished by

If the given four electronic configurations.(i) n = 4, l = 1(ii) n = 4, l = 0(iii) n = 3, l = 2(iv) n = 3, l = 1are arranged in order of increasing energy, then the order will be

Which of the following sets of quantum numbers represents the 19th electron of Cr(Z = 24) ?

Which one of the following corresponds to a photon of highest energy?

ADP and ATP differ in the number of

The major product(s) obtained form the following reaction of 1 mole of hexadeuteriobenzene is/are

The yield of acetanilide in the reaction (100% conversion) of 2 moles of aniline with 1 mole of acetic anhydride is

For the reaction belowthe structure of the product Q is

The reaction sequence given below given product R.The structure of the product R is

The conversion of CH3 \(-\) CH2 \(-\) COOH to can be accomplished by

The shape of \(XeF_5^ -\) will be

The ground state magnetic property of B2 and C2 molecules will be

Equilibrium constants for the following reactions at 1200 K are given2H2O(g) \(\rightleftharpoons\) 2H2(g) + O2(g), K1 = 6.4 \(\times\) 10\(-\)82CO2(g) \(\rightleftharpoons\) 2CO(g) + O2(g), K2 = 1.6 \(\times\) 10\(-\)6The equilibrium const...

The compound that would produce a nauseating smell/odour with a hot mixture of chloroform and ethanolic potassium hydroxide is

The number of unpaired electrons in \({[NiC{l_4}]^{2 - }}\), \(Ni{(CO)_4}\) and \({[Cu{(N{H_3})_4}]^{2 + }}\) respectively are

The correct basicity order of the following lanthanide ions is

How many faradays are required to reduce 1 mol of \(C{r_2}O_7^{2 - }\) to Cr3+ in acid medium?

The role of fluorspar, which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite is

For same mass of two different ideal gases of molecular weights M1 and M2, Plots of log V vs log p at a given constant temperature are shown. Identify the correct option.

Among Me3N, C5H5N and MeCN (Me = methyl group) the electronegativity of N is in the order

The correct order of acid strengths of benzoic acid (X), peroxybenzoic acid (Y) and p-nitrobenzoic acid (Z) is

The isomerisation of 1-butyne to 2-butyne can be achieved by treatment with

Dissolving NaCN in de-ionised water will result in a solution having

PbCl2 is insoluble in cold water. Addition of HCl increases its solubility due to

Of the following compounds, which one of the strongest Bronsted acid in a aqueous solution?

In the IUPAC system, PhCH2CH2CO2H is named as

Assuming the compounds to be completely dissociated in aqueous solution, identify the pair of the solutions that can be expected to be isotonic at the same temperature.

Which of the following atoms should have the highest 1st electron affinity?

C6H5F18 is a F18 radio-isotope labelled organic compound. F18 decays by positron emission. The product resulting on decay is

0.126 g of an acid is needed to completely neutralise 20 mL 0.1 (N) NaOH solution. The equivalent weight of the acid is

You are supplied with 500 mL each of 2N HCl and 5N HCl. What is the maximum volume of 3M HCl that you can prepare using only these two solutions?

What will be the normality of the salt solution obtained by neutralising x mL y (N) HCl with y mL x(N) NaOH, and finally adding (x + y) mL distilled water

In a close-packed body-centred cubic lattice of potassium, the correct relation between the atomic radius (r) of potassium and the edge-length (a) of the cube is

Which of the following has the dimension if [\(M{L^0}{T^{ - 2}}\)] ?

In a flask, the weight ratio of CH4(g) and SO2(g) at 298 K and 1 bar is 1 : 2. The ratio of the number of molecules of SO2(g) and CH4(g) is

When BaCl2 is added to an aqueous salt solution, a white precipitate is obtained. The anion among CO\(_3^{2 - }\), SO\(_3^{2 - }\) and SO\(_4^{2 - }\) that was present in the solution can be

Which of the following solutions will turn violet when a drop of lime juice is added to it?

During electrolysis of molten NaCl, some water was added. What will happen?

The chord of the curve \(y = {x^2} + 2ax + b\), joining the points where x = \(\alpha\) and x = \(\beta\), is parallel to the tangent to the curve at abscissa x is equal to

The value of K in order that f(x) = sin x \(-\) cos x \(-\) kx + 5 decreases for all positive real values of x is given by

Let, \(F(x) = {e^x},G(x) = {e^{ - x}}\) and \(H(x) = G(F(x))\), where x is a real variable. Then, \({{dH} \over {dx}}\) at x = 0 is

Two particles move in the same straight line starting at the same moment from the same point in the same direction. The first moves with constant velocity u and the second starts from rest with constant acceleration f. Then,

If the line ax + by + c = 0, ab \(\ne\) 0, is a tangent to the curve xy = 1 \(-\) 2x, then

The area of the figure bounded by the parabolas x = \(-\) 2y2 and x = 1 \(-\) 3y2 is

Let \({(1 + x + {x^2})^9} = {a_0} + {a_1}x + {a_2}{x^2} + ... + {a_{18}}{x^{18}}\). Then,

The locus of the mid-points of the chords of the circle \({x^2} + {y^2} + 2x - 2y - 2 = 0\), which make an angle of 90\(^\circ\) at the centre is

If one of the diameters of the curve x2 + y2 \(-\) 4x \(-\) 6y + 9 = 0 is a chord of a circle with centre (1, 1), the radius of this circle is

The common chord of the circles \({x^2} + {y^2} - 4x - 4y = 0\) and \(2{x^2} + 2{y^2} = 32\) subtends at the origin an angle equal to