List of top Questions asked in MET- 2009

In electrophilic aromatic substitution reaction, the nitro group is meta directing because it
The compound which is not formed during the dry distillation of a mixture of calcium formate and calcium acetate is
The carbon-carbon bond length in benzene is
The best method for the conversion of an alcohol into an alkyl chloride is by treating the alcohol with
The electrophile involved in the sulphonation of benzene is
A compound of 'A' and 'B' crystallises in a cubic lattice in which 'A' atoms occupy the lattice points at the corners of the cube. The 'B' atoms occupy the centre of each face of the cube. The probable empirical formula of the compound is
For the reaction $H_2O (l) \rightleftharpoons H_2O(g)$ at 373 K and 1 atm pressure
The one which decreases with dilution is
A 6% solution of urea is isotonic with
In the electrolysis of acidulated water, it is desired to obtain 1.12 cc of hydrogen per second under STP condition. The current to be passed is
An aqueous solution containing 6.5 g of NaCl of 90% purity was subjected to electrolysis. After the complete electrolysis, the solution was evaporated to get solid NaOH. The volume of 1 M acetic acid required to neutralise NaOH obtained above is
2 g of a radioactive sample having half-life of 15 days was synthesised on 1st Jan 2009. The amount of the sample left behind on 1st March, 2009 (including both the days) is
The magnetic dipole moment of a current loop is independent of
Young's double slit experiment gives interference fringes of width 0.3 mm. A thin glass plate made of material of refractive index 1.5 is kept in the path of light from one of the slits, then the fringe width becomes
Hydrogen atom from excited state comes to the ground stage by emitting a photon of wavelength λ. If R is the Rydberg constant, the principal quantum number n of the excited state is
Near a circular loop of conducting wire as shown in the figure an electron moves along a straight line. The direction of the induced current if any in the loop is
A coil of n number of turns is wound tightly in the form of a spiral with inner and outer radii a and b respectively. When a current of strength I is passed through the coil, the magnetic field at its centre is
The surface temperature of the stars is determined using
The charge deposited on 4 µF capacitor in the circuit is
A parallel beam of light is incident on a converging lens parallel to its principal axis. As one moves away from the lens on the other side of the principal axis, the intensity of light
Continuous emission spectrum is produced by
$y = 3 \sin \pi(\frac{t}{2} - \frac{x}{4})$ represents an equation of a progressive wave, where t is in second and x is in metre. The distance travelled by the wave in 5 s is
A cylindrical tube open at both the ends has a fundamental frequency of 390 Hz in air. If 1/4th of the tube is immersed vertically in water the fundamental frequency of air column is
A galvanometer of resistance 240 $\Omega$ allows only 4% of the main current after connecting a shunt resistance. The value of the shunt resistance is
According to the quark model, it is possible to build all the hadrons using