WB JEE 2023

If all the nucleophilic substitution reactions at saturated carbon atoms in the above sequence of reactions follow SN2 mechanism, then \(\mathrm{\underline E}\) and \(\mathrm{\underline F}\) will be respectively,

The correct option for the above reaction is

'\(\underline{\underline L}\)' in the above sequence of reaction is/are (where L \(\ne\) M \(\ne\) N)

Two base balls (masses : m\(_1\) = 100 g, and m\(_2\) = 50 g) are thrown. Both of them move with uniform velocity, but the velocity of m\(_2\) is 1.5 times that of m\(_1\). The ratio of de Broglie wavelengths \(\lambda\)(m\(_1\)) : $$\lambd...

An electron in the 5d orbital can be represented by the following (n, l, m) values

The conversion(s) that can be carried out by bromine in carbon tetrachloride solvent is/are

The correct set(s) of reactions to synthesize benzoic acid starting from benzene is/are

The molecular shapes of SF\(_4\), CF\(_4\) and XeF\(_4\) are

The species in which nitrogen atom is in a state of sp hybridisation is

Which of the following would give a linear plot?
(k is the rate constant of an elementary reaction and T is temp. in absolute scale)

For the reaction A + B \(\to\) C, we have the following data:

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Which of the following statements is incorrect?

The calculated spin-only magnetic moment values in BM for \(\mathrm{[FeCl_4]^-}\) and \(\mathrm{[Fe(CN)_6]^{3-}}\) are

The correct statement about the magnetic properties of \({\left[ {Fe{{(CN)}_6}} \right]^{3 - }}\) and \({\left[ {Fe{F_6}} \right]^{3 - }}\) is

Nickel combines with a uninegative monodentate ligand (X\(^-\)) to form a paramagnetic complex [NiX\(_4\)]\(^{2-}\). The hybridisation involved and number of unpaired electrons present in the complex are respectively

\(\mathrm{BrF_3}\) self ionises as following

The equivalent conductance of NaCl, HCl and CH\(_3\)COONa at infinite dilution are 126.45, 426.16 and 91 ohm\(^{-1}\)cm\(^2\)eq\(^{-1}\) respectively at 25\(^\circ\)C. The equivalent conductance of acetic acid (at infinite dilution) would b...

The root mean square (rms) speed of X\(_2\) gas is x m/s at a given temperature. When the temperature is doubled, the X\(_2\) molecules dissociated completely into atoms. The root mean square speed of the sample of gas then becomes (in m/s)

Case - 1 : An ideal gas of molecular weight M at temperature T.
Case - 2 : Another ideal gas of molecular weight 2M at temperature T/2.
Identify the correct statement in context of above two cases.

Which statement(s) is/are applicable above critical temperature?

The correct order of C = O bond length in ethyl propanoate (I), ethyl propenoate (II) and ethenyl propanoate (III) is

Select the molecule in which all the atoms may lie on a single plane is

The correct stability order of the following carbocations is
(I) \(\mathrm{{H_2}\mathop C\limits^ \oplus - CH = CH - C{H_3}}\)
(II) \(\mathrm{\mathop C\limits^ \oplus {H_2} - CH = CH - BM{e_2}}\)
(III) $$\mathrm{{H_2}\mathop C\limits^ \o...

The correct order of boiling points of N-ethylethanamine (I), ethoxyethane (II) and butan-2-ol (III) is

The correct order of acidity of above compounds is

Structure of M is,

'\(\underline G\)' in the above sequence of reactions is

At STP, the dissociation reaction of water is \(\mathrm{H_2O\rightleftharpoons H^+~(aq.)+OH^-~(aq.)}\), and the pH of water is 7.0. The change of standard free energy (\(\Delta\)G\(^\circ\)) for the above dissociation process is given by

Which of the following mixtures act(s) as buffer solution?

The relationship between the pair of compounds shown above are respectively,

The IUPAC name of

A solution containing 4g of polymer in 4.0 litre solution at 27\(^\circ\)C shows an osmotic pressure of 3.0 \(\times\) 10\(^{-4}\) atm. The molar mass of the polymer in g/mol is

4f\(^2\) electronic configuration is found in

Suppose a gaseous mixture of He, Ne, Ar and Kr is treated with photons of the frequency appropriate to ionize Ar. What ion(s) will be present in the mixture?

If in case of a radio isotope the value of half-life (T\(_{1/2}\)) and decay constant (\(\lambda\)) are identical in magnitude, then their value should be

The equivalent weight of KIO\(_3\) in the given reaction is (M = molecular mass):
\(\mathrm{2Cr{(OH)_3} + 4O{H^ - } + KI{O_3} \to 2CrO_4^{2 - } + 5{H_2}O + KI}\)

What is the edge length of the unit cell of a body centred cubic crystal of an element whose atomic radius is 75 pm?

Arrange the following in order of increasing mass
I. 1 mole of N\(_2\)
II. 0.5 mole of O\(_3\)
III. \(3.011\times10^{23}\) molecules of O\(_2\)
IV. 0.5 gram atom of O\(_2\)

63 g of a compound (Mol. Wt. = 126) was dissolved in 500 g distilled water. The density of the resultant solution as 1.126 g/ml. The molarity of the solution is

Na\(_2\)CO\(_3\) is prepared by Solvay process but K\(_2\)CO\(_3\) cannot be prepared by the same because

A missile is fired from the ground level rises x meters vertically upwards in t sec, where \(x = 100t - {{25} \over 2}{t^2}\). The maximum height reached is

The portion of the tangent to the curve \({x^{{2 \over 3}}} + {y^{{2 \over 3}}} = {a^{{2 \over 3}}},a > 0\) at any point of it, intercepted between the axes

Given \(f(x) = {e^{\sin x}} + {e^{\cos x}}\). The global maximum value of \(f(x)\)

A balloon starting from rest is ascending from ground with uniform acceleration of 4 ft/sec\(^2\). At the end of 5 sec, a stone is dropped from it. If T be the time to reach the stone to the ground and H be the height of the balloon when th...

If \(f(x) = 3\root 3 \of {{x^2}} - {x^2}\), then

If the vertices of a square are \({z_1},{z_2},{z_3}\) and \({z_4}\) taken in the anti-clockwise order, then \({z_3} =\)

Reflection of the line \(\overline a z + a\overline z = 0\) in the real axis is given by :

If z\(_1\) and z\(_2\) are two complex numbers satisfying the equation \(\left| {{{{z_1} + {z_2}} \over {{z_1} - {z_2}}}} \right| = 1\), then \({{{z_1}} \over {{z_2}}}\) may be

the expression \({{\int\limits_0^n {[x]dx} } \over {\int\limits_0^n {\{ x\} dx} }}\), where \([x]\) and \(\{ x\}\) are respectively integral and fractional part of \(x\) and \(n \in N\), is equal to

The value \(\int\limits_0^{1/2} {{{dx} \over {\sqrt {1 - {x^{2n}}} }}}\) is \((n \in N)\)