AIPMT 2007

Which of the compound with molecular formula C5H10 yields acetone on ozonolysis?

Predict the product C obtained in the following reaction of 1-butyne.

A weak acid, HA, has a Ka of 1.00 \(\times\) 10\(-\)5. If 0.100 mol of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to

Calculate the pOH of a solution at 25oC that contains 1 \(\times\) 10\(-\)10 M of hydronium ions, i.e. H3O+.

Which one of the following on reduction with lithium aluminium hydride yields a secondary amine?

Which of the following oxidation states are the most characteristic for lead and tin respectively?

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

Which of the following anions is present in the chain structure of silicates?

With which of the following electronic configuration an atom has the lowest ionisation enthalpy ?

Which one of the following ionic species has the greatest proton affinity to form stable compound ?

Identify the correct order of the size of the following :

Which one of the following polymers is prepared by condensation polymerisation?

Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?

Sulphide ores of metals are usually concentrated by froth floatation process. Which one of the following sulphide ores offer an exception and is concentrated by chemical leaching?

In which of the following the hydration energy is higher than the lattice energy?

The correct order of increasing thermal stability of K2CO3, MgCO3, CaCO3 and BeCO3 is

If NaCl is doped with 10\(-\)4 mol% of SrCl2, the concentration of cation vacancies will be (NA = 6.02 \(\times\) 1023 mol\(-\)1)

The fraction of total volume occupied by the atoms present in a simple cube is

0.5 molal aqueous solution of a weak acid (HX) is 20% ionised. If Kf for water is 1.86 K kg mol\(-\)1, the lowering in freezing point of the solution is

Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80 g mL\(-\)1. Volume of acid required to make one litre of 0.1 M H2SO4 solution is

An element, X has the following isotopic composition:
200X : 90%  199X : 8.0%  202X : 2.0%
The weighted average atomic mass of the naturally occuring element X is closest to

The order of decreasing reactivity towards an electrophilic reagent, for the following would be
(i) benzene
(ii) toluene
(iii) chlorobenzene
(iv) phenol

If there is no rotation of plane polarised light by a compound in a specific solvent, through to be chiral, it may mean than

For (i) I\(-\), (ii) Cl\(-\), (iii) Br\(-\), the increasing order of nucleophilicity would be

Consider the following sets of quantum numbers :

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The Langmuir adsorption isotherm is deduced using the assumption

Consider the following reactions :
(i) H+(aq) + OH\(-\)(aq) = H2O(l),  \(\Delta\)H = \(-\) X1 kJ mol\(-\)1
(ii) H2(g) + 1/2O2(g) = H2O(l),   \(\Delta\)H = \(-\) X2 kJ mol\(-\)1
(iii) CO2(g) + H2(g) = CO(g) + H2O(l),  \(\Delta\)H = $$-$...

Given that bond energies of H \(-\) H and Cl \(-\) Cl are 430 kJ mol\(-\)1 and 240 kJ mol\(-\)1 respectively and \(\Delta\)Hf for HCl is \(-\) 90 kJ mol\(-\)1, bond enthalpy of HCl is

A transformer is used to light a 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 amp, the efficiency of the transformer is approximately

The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux \(\phi\) linked with the primary coil is given by \(\phi\) = \(\phi\)0 + 4t, where \(\phi\) is webers, t is time in seconds and $...

What is the value of inductance L for which the current is maximum in a series LCR circuit with C = 10 \(\mu\)F and \(\omega\) = 1000 s\(-\)1 ?

If the nucleus \({}_{13}^{27}Al\) has a nuclear radius of about 3.6 fm, them \({}_{32}^{125}Te\) would have its radius approximately as

In a mass spectrometer used for measuring the masses of ions, the ions are initially accelerated by an electric potential \(V\) and then made to describe semicircular paths of radius R using a magnetic field B. If V and B are kept constant,...

The total energy of electron in the ground state of hydrogen atom is \(-\) 13.6 eV. The kinetic energy of an electron in the first excited state is

Two radioactive substances A and B have decay constants 5\(\lambda\) and \(\lambda\) respectively. At t = 0 they have the same number of nuclei. The ratio of number of nuclei of A to those of B will be (1/e)2 after a time interval

In a radioactive decay process, the negatively charged emitted \(\beta\)-particles are

A nucleus \({}_Z^AX\) has mass represented by M(A, Z). If Mp and Mn denote the mass of proton and neutron respectively and B.E. the binding energy in MeV, then

Two condensers, one of capacity C and other of capacity C/2 are connected to a V-volt battery, as shown in the figure. The work done in charging fully both the condensers is

Three resistances, P, Q, R each of 2\(\Omega\) and an unknown resistance S from the four arms of a Wheatstone bridge circuit. When a resistance of 6 \(\Omega\) is connected in parallel to S the bridge gets balanced. What is the value of S...

The total power dissipated in watt in the circuit shown here is

A 5 watt source emits monochromatic light of wavelength 5000 \(\mathop A\limits^ \circ\). When placed 0.5 m away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of 1.0 m, the num...

A beam of electron passes undeflected through mutually perpendicular electric and magnetic fields. If the electric field is switched off, and the same magnetic field is maintained, the electrons move

Monochromatic light of frequency 6.0 \(\times\) 1014 Hz is produced by a laser. The power emitted is 2 \(\times\) 10\(-\)3 W. The number of photons emitted, on the average, by the source per second is

The electric and magnetic field of an electromagnetic wave are

Three point charges +q, \(-\) 2q and + q are placed at points (x = 0, y = a, z = 0), (x = 0, y = 0, z = 0) and (x = \(a\), y = 0, z = 0) respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly ...

Charges +q and \(-\)q are placed at points A and B respectively which are a distance 2L apart, C is the midnight between A and B. The work done in moving a charge + Q along the semicircle CRD is

A hollow cylinder has a charge q coulomb within it. If \(f\) is the electric flux in units of voltmeter associated with the curved surface B, the flux linked with the plane surface A in units of V-m will be

A small coin is resting on the bottom of a beaker filled with liquid . A ray of light from the coin travels upto the surface of the liquid and moves along its surface. How fast is the light travelling in the liquid ?

Two satellites of earth, S1 and S2 are moving in the same orbit. The mass of S1 is four times the mass of S2. Which one of the following statements is true ?

An engine has an efficiency of 1/6. When the temperature of sink is reduced by 62oC, its efficiency is doubled. Temperatures of the source is