IIT-JEE 1992

The cyanide ion, CN- and N2 are isoelectronic, But in contrast to CN-, N2 is chemically inert, because of

The maximum number of hydrogen bonds a water molecule can form is

The molecules that will have dipole moment are

The type of hybrid orbitals used by the chlorine atom in \(ClO_2^-\) is

Which of the following have identical bond order?

For the galvanic cell
Ag | AgCl(s), KCl (0.2M) || KBr (0.001M), AgBr(s) | Ag
Calculate the EMF generated and assign correct polarity to each electrode for a spontaneous process after taking into account the cell reaction at 25oC.
[Ksp(AgCl)...

An aqueous solution of NaCl on electrolysis gives H2(g), Cl2(g) and NaOH according to the reaction:
2Cl- (aq) + 2H2O = 2OH- (aq) + H2 (g) + Cl2 (g)
A direct current of 25 amperes with a current efficiency of 62 % is passed through 20 litres...

At 27oC, hydrogen is leaked through a tiny hole into a vessel for 20 minutes. Another unknown gas at the same temperature and pressure as that of H2 is leaked through the same hole for 20 minutes After the effusion of the gases the mixture ...

At room temperature the following reacton is procedd nearly to completion:
2NO + O2 \(\to\) 2NO2 \(\to\) N2O4
The dimer, N2O4, solidifies at 262 K. A 250 ml flask and a 100 ml flask are separated by a stop-cock. At 300 K, the nitric oxid...

Give reasons of the following:
Hydrogen peroxide acts as an oxidising as well as a reducing agent.

The statement that is not correct for the periodic classification of element is

For the redox reaction:
\(MnO_4^ - + {C_2}O_4^{ - 2} + {H^ + }\) \(\to M{n^{2 + }} + C{O_2} + {H_2}O\)
The correct coefficients of the reactants for the balanced
reaction are

The species that do not contain peroxide ions are

A 2.0 g sample of a mixture containing sodium carbonate, sodium bicarbonate and sodium suplphate is gently heated till the evolution of CO2 ceases. The volume of CO2 at 750 mm Hg pressure and at 298K is measured to be 123.9 ml. A 1.5g of th...

One gram of commercial AgNO3 is dissolved in 50 ml. of water. It is treated with 50 ml. of a KI solution. The silver iodide thus precipitated is filtered off. Excess of KI in the filterate is titrated with (M/10) KIO3 solution in presence o...

Which of the following does not characterise X-rays?

Which of the following relates to photons both as wave motion and as a stream of particles?