NEET 2013

A magnetic moment at 1.73 BM will be shown by one among of the following

An excess of AgNO3 is added to 100 mL of a 0.01 M solution of dichlorotetraaquachromium (III) chloride. The number of moles of AgCl precipitated would be

Which of the following lanthanoid ions is diamagnetic?
(At. nos. Ce = 58, Sm = 62, Eu = 63, Yb = 70)

Which of the following statements about the interstitial compounds is incorrect?

At 25oC molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is 9.54 ohm\(-\)1 cm2 mol\(-\)1 and at infinite dilution its molar conductance is 238 ohm\(-\)1 cm2 mol\(-\)1. The degree of ionisation of ammonium hydroxide at t...

A button cell used in watches function as following.
Zn(s) + Ag2O(s) + H2O(l) \(\rightleftharpoons\) 2Ag(s) + Zn2+(aq) + 2OH\(-\)(aq)
If half cell potentials are
Zn2+(aq) + 2e\(-\) \(\to\) Zn(s);  Eo = \(-\)0.76 V
Ag2O(s) + H2O(l) + 2e...

A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of electrode would be

Maximum deviation from ideal gas is expected from

Which of the following compounds will not undergo Friedal-Craft's reaction easily?

Which of these is least likely to act as a lewis base ?

KMnO4 can be prepared from K2MnO4 as per the reaction,
3MnO42\(-\) + 2H2O \(\rightleftharpoons\) 2MnO4\(-\) + MnO2 + 4OH\(-\)
The reaction can go to completion by removing OH\(-\) ions by adding

In the reaction

A is

Nitrobenzene on reaction with conc. HNO3/H2SO4 at 80\(-\)100oC forms which one of the following products?

Which of these is not a monomer for a high molecular mass silicone polymer?

Which of the following structure is similar to graphite?

The basic structural unit of silicates is

Which is the strongest acid in the following?

Which one of the following molecules contains no \(\pi\) bond?

Which of the following does not give oxygen on heating?

Which is the monomer of neoprene in the following?

Nylon is an example of

Roasting of sulphides gives the gas X as a byproduct. This is a colourless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic, acts as a reducing a...

The number of carbon atoms per unit cell of diamond unit cell is

A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm\(-\)3. The molar mass of the metal is
(NA Avogadro's constant = 6.02 \(\times\) 1023 mol\(-\)1)

How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M HNO3? The concentrated acid is 70% HNO3.

6.02 \(\times\) 1020 molecules of urea present in 100 mL of its solution. The concentration of solution is

The radical,

is aromatic because it has

Structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is

The structure of isobutyl group in an organic compound is

Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating ?

The value of Planck's constant is 6.63 \(\times\) 10\(-\)34 J s. The speed of light is 3 \(\times\) 1017 mm s\(-\)1. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 6 \(\times\) 1015 s$$-...

What is the maximum numbers of electrons that can be associated with the following set of quantum numbers ?
n = 3, \(l\) = 1 and m = \(-\) 1

Based on equation E = \(-\) 2.178 \(\times\) 10\(-\)18 J \(\left( {{{{Z^2}} \over {{n^2}}}} \right)\), certain conclusions are written. Which of them is not correct ?

A reaction having equal energies of activation for forward and reverse reactions has

A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when

The half life of a radioactive isotope 'X' is 20 years. It decays to another element 'Y' which is stable. The two elements 'X' and 'Y' were found to be in the ratio 1 : 7 in a sample of a given rock. The age of the rock is estimated to be

Ratio of longest wave lengths corresponding to Lyman and Balmer series in hydrogen spectrum is

A certain mass of Hydrogen is changed to Helium by the process of fusion. The mass defect in fusion reaction is 0.02866 u. The energy liberated per u is (given 1 u = 931 MeV)

An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. The first part of mass 1 kg moves with a speed of 12 m s\(-\)1 and the second part of mass 2 kg moves with 8 m s\(-\)1 spe...

The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10 \(\Omega\) is

The resistances of the four arms P, Q, R and S in a Wheatstone's bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm, respectively. The e.m.f. and internal resistance of the cell are 7 volt and 5 ohm respectively. If the galvanometer resistance is...

A wire of resistance 4 \(\Omega\) is stretched to twice its original length. The resistance of stretched wire would be

A parallel beam of fast moving electrons is incident normally on a narrow slit. A fluorescent screen is placed at a large distance from the slit. If the speed of the electrons is increased, which of the following statements is correct ?

For photoelectric emission from certain metal the cutoff frequency is \(\upsilon\). If radiation of frequency 2\(\upsilon\) impinges on the metal plate, the maximum possible velocity of the emitted electron will be (m is the electron mass...

The wavelength \(\lambda\)e of an electron and \(\lambda\)p of a photon of same energy E are related by

A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e.m.f. is

The condition under which a microwave oven heats up a food item containing water molecules most efficiently is

Two pith balls carrying equal charges are suspended from a common point by strings of equal length, the equilibrium separation between them is r. Now the strings are rigidly clamped at half the height. The equilibrium separation between the...

A, B and C are three points in a uniform electric field. The electric potential is

For a normal eye, the cornea of eye provides a converging power of 40 D and the least converging power of the eye lens behinf the cornea is 20 D. Using this information, the distance between the retina and the cornea-eye lens can be estimat...