IIT-JEE 1996

The number and type of bonds between two carbon atoms in CaC2 are:

Among the following species, identity the isostructural pairs NF3, \(NO_3^-\), BF3, H3O+ , HN3

When N2, the N-N bond distance _____ and when O2 goes to \(O_2^+\) the O-O bond distance ___.

The ionisation constant of \(NH_4^+\) in water is 5.6 \(\times\) 10-10 at 25oC. The rate constant for the reaction of \(NH_4^+\) and \(OH^-\) to form NH3 and H2O at 25oC is 3.4 \(\times\) 1010 L mol-1s-1. Calculate the rate constant for pro...

The standard reduction potential for Cu2+|Cu is +0.34 V. Calculate the reduction potential at pH = 14 for the above couple. Ksp of Cu(OH)2 is 1.0 \(\times\) 10-19

A mixture of ideal gas is cooled upto liquid helium temperature (4.22K) to form an ideal solution

Which of the following has the maximum number of unpaired electrons?

Explain the difference in the nature of bonding in LiF and LiI.

The following compounds have been arranged in order of their increasing thermal stabilities. Identify the correct order
K2CO3 (A), MgCO3 (B), CaCO3 (C), BeCO3 (D)

The molar volume of liquid benzene (density = 0.877 g mL-1) increases by a factor of 2750 as it vaporises at 20oC and that of liquid toluene (density = 0.867 g mL-1) increases by a factor of 7720 at 20oC. A solution of benzene and toluene a...

A 3.00 g sample containing Fe3O4, Fe2O3 and an inert impure substance is treated with excess of KI solution in presence of dilute H2SO4. The entire iron is converted into Fe2+ along with the liberation of iodine. The resulting solution is ...

Consider the hydrogen atom to be a proton embedded in a cavity of radius a0 (Bohr radius) whose charge is neutralised by the addition of an electron to the cavity in vacuum, infinitely slowly. Estimate the average total energy of an electro...

Calculate the wave number for the shortest wavelength transition in the Balmer series of atomic hydrogen.

The orbital angular momentum of an electron in 2s orbital is