List of top Chemistry Questions asked in WBJEE

For the reaction A+B\(\rightarrow\)C, we have the following data:
Initial concentration of A(in molarity)Initial concentration of B (in molarity)Rate(initial)(Relevant unit)
110100
111
10110








The order of the reaction with respect to A and B are:
63g of a compound (Mol.Wt.=126) was dissolved in 500g of distilled water.The density of the resultant solution is 1.126g/ml. The molarity of the solution is
Which statement(s) is/are applicable above critical temperature?
Which of the following statements is incorrect? 
Structure of M
Structure of M is
Nickel combines with a uninegative monodentate ligand (X-) to form a paramagnetic complex [NiX4]2-.The hybridization involved and number of unpaired electrons present in the complex and respectively
 
'L' in the above sequence of reaction is/are(where L≠M≠N)
The root mean square(rms) speed of X2 gas is x m/s at a given temperature. When the temperature is doubled, the X2 molecules dissociated completely into atoms. The root mean square speed of the sample of gas then becomes (in m/s)
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)H2C⨁-CH=CH-CH3, (II)⨁CH2-CH=CH-BMe2, (III)H2C⨁-CH=CH-NMe2, (IV)H2C⨁-CH=CH-OMe
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 N2, (ii) 0.5 mole of O3, (iii) \(3.011×10^{23}\) molecules of O2, (iv) 0.5 gram atom of O2
The IUPAC name of CH3CH=C-CHO-CH2-CH3 is:
 
'G' in the above sequence of reaction is
The molecular shapes of SF4,CF4 and XeF4 are
A solution containing 4g of polymer in a 4.0-litre solution at 27°C shows an osmotic pressure of 3.0×10-4 atm. The molar mass of the polymer in g/mol is
(i)(ii)(iii)(iv)
The correct order of acidity of above compound is 

The correct option for the above reaction is 

(i)

(ii)

(iii)

 

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

BrF3 self ionizes as following
The species in which nitrogen atom is in a state of sp hybridisation is
Suppose a gaseous mixture of He,Ne,Ar and Kr is irradiated with photons of the frequency appropriate to ionize Ar,What ion(s) will be present in the mixture?
If in the case of a radio-isotope, the value of half-life(T1/2) and decay constant(λ) are identical in magnitude, then their value should be
Na2CO3 is prepared by Solvay process but K2CO3 can not be prepared by the same because
The equivalent conductance of NaCl, HCl, and CH3COONa at infinite dilution are 126.45, 426.16, and 91 ohm-1cm2eq-1 respectively at 25°C. The equivalent conductance of acetic acid(at infinite dilution) would be