AIPMT 2001

Nitrogen forms N2, but phosphorus does not form P2, however, it converts P4, reason is

In X - H --- Y, X and Y both are electronegative elements. Then

In which of the following bond angle is maximum ?

When a bio-chemical reaction is carried out in laboratory, outside the human body in absence of enzyme, then rate of reaction obtained is 10\(-\)6 times, the activation energy of reaction in the presence of enzyme is

For the reaction; 2N2O5 \(\to\) 4NO2 + O2 rate and rate constant are 1.02 \(\times\) 10\(-\)4 and 3.4 \(\times\) 10\(-\)5 sec\(-\)1 respectively, then concentration of N2O5 at that time will be

Coordination number of Ni in [Ni(C2O4)3]4\(-\) is

Which of the following will give maximum number of isomers?

Which of the following will exhibit maximum ionic conductivity?

Which of the following organometallic compounds is \(\sigma\) and \(\pi\) bonded?

Which statement is incorrect?

Which of the following statement is not correct?

The most convenient method to protect the botton of ship made of iron is

Standard electrode potentials are Fe2+/Fe [Eo = \(-\)0.44] and Fe3+/Fe2+[ Eo = 0.77]; If Fe2+, Fe3+ and Fe blocks are kept together, then

The beans are cooked earlier in pressure cooker because

An organic compound A(C4H9Cl) on reaction with Na/diethyl ether gives a hydrocarbon which on monochlorination gives only one chloro derivative then, A is

obtained by chlorination of n-butane will be

In preparation of alkene from alcohol using Al2O3 which is the effective factor ?

Ionisation constant of CH3COOH is 1.7 \(\times\) 10\(-\)5 and concentration of H+ ions is 3.4 \(\times\) 10\(-\)4. Then find out initial concentration of CH3COOH molecules.

In HS\(-\), I\(-\), R \(-\) NH2, NH3 order of proton accepting tendency will be

Solubility of M2S salt is 3.5 \(\times\) 10\(-\)6 then find out solubility product.

Correct relation between dissociation constants of a dibasic acid is

If a \({}_b^aX\) species emits first a position, then two a and two b particles and in the last, one a, is also emitted and gets converts to \({}_d^c\)Y species. So correct relation is

A human body required 0.01 m activity of radioactive substance after 24 hours. Half life of radioactive substance is 6 hours. Then inhection of maximum activity of radioactive substance that can be injected is

Intermediates formed during reaction of

are

Correct order of 1st ionization potential among following elements Be, B, C, N, O is

Which of the following is not correctly matched?

When Zn converts from melted state to its solid state, it has hcp structure, then find the number of nearest atoms.

Pure water can be obtained from sea water by

Specific volume of cylinfrical virus particle is 6.02 \(\times\) 10\(-\)2 cc/g whose radius and length are 7 \(\mathop A\limits^ \circ\) and 10 \(\mathop A\limits^ \circ\) respectively. If NA = 6.02 \(\times\) 1023, find molecular w...

Molarity of liquid HCl, if density of solution is 1.17 g/ce is

Percentage of Se in peroxidase anhydrous enzyme is 0.5% by weight (at. wt. = 78.4) then minimum molecular weight of peroxide anhydrous enzyme is

The correct acidic order of the following is

A compound of molecular formula C7H16 shows optical isomerism, compound will be

In steam distillation of toluene, the pressure of toluene in vapour is

The incorrect IUPAC name is

Main axis of a diatomic molecule is z, molecular orbital px and py overlap to from which of the following orbitals.

The following quantum numbers are possible for how many orbitals :
n = 3, \(l\) = 2, m = +2 ?

Which is not correct regarding the adsorption of a gas on surface of a solid?

PbO2  \(\to\) PbO; \(\Delta\)G298 < 0
SnO2 \(\to\) SnO;  \(\Delta\)G298 > 0
Most probable oxidation state of Pb and Sn will be

Enthalpy of CH4 + \({1 \over 2}\) O2 \(\to\) CH3OH is negative. If enthalpy of combustion of CH4 and CH3OH are x and y respectively. Then which relation is correct?

When 1 mol of gas is heated at constant volume temperature is raised from 298 to 308 K. Heat supplied to the gas is 500 J. Then which statement is correct ?

Change in enthalpy for reaction,
2H2O2(l) \(\to\) 2H2O(l) + O2(g)
if heat of formation of H2O2(l) and H2O(l) are \(-\)188 and - 286 kJ/mol respectively, is

A capacitor of capacity C has reactance X. If capacitance and frequency become double then reactance will be

The value of quality factor is

Which rays contain (positive) charged particles ?

Energy released in nuclear fission is due to

The interplanar distance in a crystal is 2.8 \(\times\) 10\(-\)8 m. The value of maximum wavelength which can be diffracted

Half life of a radioactive element is 12.5 hour and its quantity is 256 g. After how much time its quantity will remain 1 g?

X(n, \(\alpha\)) \({}_3^7\)Li, then X will be

The energy of hydrogen atom in nth orbit is En then the energy in nth orbit of singly ionised helium atom will be