AIEEE 2003

During dehydration of alcohols to alkenes by heating with conc. H2SO4 the initiation step is

An ethar is more volatile than an alcohol having the same molecular formula. This is due to

The reaction of chloroform with alcoholic \(KOH\) and p-toluidine forms

When CH2 = CH - COOH is reduced with LiAlH4, the compound obtained will be

In the anion HCOO\(-\)
the two carbon-oxygen bonds are found to be of equal length. What is the reason for it?

The IUPAC name of CH3COCH(CH3)2 is

The general formula CnH2nO2 could be for open chain

Among the following four structures \(i\) to \(iv,\)

it is true that

Complete hydrolysis of cellulose gives

The reason for double helical structure of \(DNA\) is operation of

Which one of the following pairs of molecules will have permanent dipole moments for both members

Which one of the following compounds has the smallest bond angle in its molecule?

The pair of species having identical shapes for molecules of both species is

Consider the reaction equilibrium
2 SO2 (g) + O2 (g) \(\leftrightharpoons\) 2 SO3 (g); \(\Delta H^o\) = -198 kJ
One the basis of Le Chatelier's principle, the condition favourable for the forward reaction is :

For the reaction equilibrium
N2O4 (g) \(\leftrightharpoons\) 2NO2 (g)
the concentrations of N2O4 and NO2 at equilibrium are 4.8 \(\times\) 10-2 and 1.2 \(\times\) 10-2 mol L-1 respectively. The value of Kc for the reaction is

For the reaction system:
2NO(g) + O2(g) \(\to\) 2NO2(g) volume is suddenly reduce to half its value by increasing the pressure on it. If the reaction is of first order with respect to O2 and second order with respect to NO, the rate of rea...

The half-life of a radioactive isotope is three hours. If the initial mass of the isotope were 256 g, the mass of
it remaining undecayed after 18 hours would be

The rate law for a reaction between the substances A and B is given by Rate = k[A]n [B]m On doubling the concentration of A and halving the concentration of B, the ratio of the new rate to the earlier rate of the reaction will be as

The radionucleide \({}_{90}^{234}Th\) undergoes two successive \(\beta\) -decays followed by one \(\alpha\)-decay. The atomic number
and the mass number respectively of the resulting radionucleide are

In respect of the equation k = Ae-Ea/RT in chemical kinetics, which one of the following statements is correct?

The correct order of increasing basic nature for the bases NH3, CH3NH2 and (CH3)2 NH is

Ethyl isocyanide on hydrolysis in acidic medium generates

In the coordination compound, K4[Ni(CN)4], the oxidation state of nickel is :

One mole of the complex compound Co(NH3)5Cl3, gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with two moles of AgNO3 solution to yield two moles of AgCl (s). The structure of the complex is :

Ammonia forms the complex ion [Cu(NH3)4]2+ with copper ions in alkaline solutions but not in acidic solutions. What is the reason for it?

Which one of the following statements is correct?

For making good quality mirrors, plates of float glass are used. These are obtained by floating molten glass
over a liquid metal which does not solidify before glass. The metal used can be :

The radius of La3+ (Atomic number of La = 57) is 1.06 Å. Which one of the following given values will be
closest to the radius of Lu3+ (Atomic number of Lu = 71) ?

A red solid is insolvable in water. However it becomes soluble if some \(K{\rm I}\) is added to water. Heating the red solid in a test tube results in liberation of some violet colored fumes and droplets of a metal appear on the cooler part...

What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid?

The atomic numbers of vanadium (V), Chromium (Cr), manganese (Mn) and iron (Fe) are respectively 23, 24, 25 and 26. Which one of these may be expected to have the highest second ionization enthalpy?

The number of d-electrons retained in Fe2+ (At no of Fe = 26) ion is :

Which one of the following nitrates will leave behind a metal on strong heating?

Several blocks of magnesium are fixed to the bottom of a ship to :

For a cell reaction involving a two-electron change, the standard e.m.f. of the cell is found to be 0.295 V at 25oC. The equilibrium constant of the reaction at 25oC will be

For the redox reaction Zn(s) + Cu2+(0.1 M) \(\to\) Zn2+(1M) + Cu(s) taking place in a cell, \(E_{cell}^o\) is 1.10 volt. Ecell for the cell will be (\(2.303{{RT} \over F}\) = 0.0591)

When during electrolysis of a solution of AgNO3, 9650 coulombs of charge pass through the electroplating
bath, the mass of silver deposited on the cathode will be :

Standard reduction electrode potentials of three metals A,B&C are respectively +0.5 V, -3.0 V & -1.2 V. The
reducing, powers of these metals are

According to the kinetic theory of gases, in an ideal gas, between two successive collisions of a gas molecule travels

Bottles containing C6H5l and C6H5CH2I lost their original labels. They were labelled A and B for testing A and B were separately taken in test tubes and boiled with NaOH solution. The end solution in each tube was made acidic with dilute HN...

On mixing a certain alkane with chlorine and irradiating it with ultravioletlight, it forms only one
monochloroalkane. This alkane could be

Butene-1 may be converted to butane by reaction with

Which one of the following process will produce hard water?

Which of the following could act as a propellant for rockets?

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value :

Which one of the following statements is not true?

The solubility in water of a sparingly soluble salt AB2 is 1.0 \(\times\) 10-5 mol L-1. Its solubility product number will be :

Which one of the following substances has the highest proton affinity?

Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that
graphite :

Glass is a :