List of top Chemistry Questions

The correct statement about the magnetic properties of [Fe(CN)6]3- and [FeF6]3- is
The species in which nitrogen atom is in a state of sp hybridisation is

The equivalent weight of KIO3 in the given reaction is (M=molecular mass) :
2Cr(OH)3 + 4OH + KIO3 → 2CrO42- + 5H2O +KI

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
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
Which of the following would give a linear plot? (K is the rate constant of an elementary reaction and T is the temperature in absolute scale)
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:
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
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 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)
What is the edge length of the unit cell of a body-centred cubic crystal of an element whose atomic radius is 75 pm?

At 50 °C, the vapour pressure of pure benzene is 268 torr. The number of moles of non-volatile solute per mole of benzene required to prepare a solution having a vapour pressure of 167 torr at the same temperature is

The formula of a metal oxide is M0.96 O1. The fractions of metal that exists as M3+and M2+ ions in that oxide are respectively

An alkene X on ozonolysis gives a mixture of Propan-2-one and methanal. What is X?

The aromatic compound/species with maximum number of x - electrons is

Identify the correct statement about the oxidation states of group 14 elements

Aluminum reacts with dilute HCL and liberates a gas 'A' and with aqueous alkali liberates a gas 'B'. A and B respectively are

The alkali metal with the lowest E M- M+ (V) is X and the alkali metal with highest E M- M+ is Y. Then X and Y are respectively: 

The hybrids of which group elements of the periodic table form electron precise hybrids?

Which of the following does not form a buffer solution?

For the reaction at 25° C, X2O4 (l) → 2XO2(g), U and S are 2.1 K.Cal and 20 Cal/K respectively. what is G for the reaction at the same temperature? (R = 2 CAL K-1MOL-1)

Which one of the following has the same number of atoms as are in 6g of H2O

The rate of diffusion of a gas A is √5 times more than of gas B. If the molar mass of A is x gmol-1, the molar mass of B ( in g mole-1) is