IIT-JEE 1990

Give the IUPAC name of the following compound :

The presence of polar bonds in a poly-atomic molecule suggests that the molecule has non-zero dipole moment.

The shape of [CH3]+ is _____.

Amongst the following elements (whose electronic configuration are given below), the one having the highest ionization energy is:

The oxidation number of phosphorus in Ba(H2PO2) is :

When zeolite, which is hydrated sodium aluminium silicate is treated with hard water the sodium ions are exchanged with

The vapour pressure of pure benzene at a certain temperature is 640 mm Hg. A non-volatile non-electrolyte solid weighing 2.175 g is added to 39.0 g of benzene. The vapour pressure of the solution is 600 mm Hg. What is the molecular weight o...

The freezing point of equimolal aqueous solutions will be highest for

A solid mixture (5.0 g) consisting of lead nitrate and sodium nitrate was headed below 600oC until the weight of the residue was constant. If the loss in weight 28.0 percent, find the amount of lead nitrate and sodium nitrate in the mixture...

A mixture of H2C2O4 (oxalic acid) and NaHC2O4 weighing 2.02 g was dissolved in water and solution made upto one litre. Ten millilitres of the solution required 3.0 ml. of 0.1 N sodium hydroxide solution for complete neutralization. In anoth...

Calculate the molality of 1 litre solution of 93% H2SO4 (weight/volume). The density of the solution is 1.84 g/ml

According to Bohr's theory, the electronic energy of hydrogen atom in the nth Bohr's orbit is given by \({E_n} = {{ - 21.6 \times {{10}^{ - 19}}} \over {{n^2}}}J\). Calculate the longest wavelength of light (in Å) that will be needed to rem...