List of top Questions asked in AMUEEE- 2011

Formic acid can be distinguished from acetic acid by reacting with
Eutrophication is due to
Arrange the following carbocations in order of increasing stability $ [A] (CH_3)_3C\overset{+}{C}H_2 \, $ , $ [B] (CH_3)_3\overset{+}{C}\, [B] $ , $ [C] CH_3CH_3C^+H_2\, $ , $ [D] CH_3\overset{+}{C}HCH_2CH_3 \, $
Arrange the following $ CH_3CH_2CH_2Cl\, (I) $ , $ CH_3CH_2-CHCl-CH_3\, (II) $ , $ (CH_3)_2CHCH_2Cl \,(III) $ and $ (CH_3)_3C?Cl \,(IV) $ in order of decreasing tendency towards $ S_N2 $ reactions
An intrinsic semiconductor has a resistivity of $ 0.50 \Omega\, m $ at room temperature. Find the intrinsic carrier concentration, if the mobilities of electrons and holes are $ 0.39\, m^2/Volt $ , and $ 0.11 m^2/Volt \,sec $ respectively
An artificial satellite moving in a circular orbit at a distance $h$ from the centre of the earth has a total energy $E_0$. Its potential energy is
Example of electrophile is
Splitting of spectral lines in electric field is called
Arrange the following acids in order of their increasing acidity.
Which of the following are isoelectronic molecules?
The following reagent is used for introducing a formyl group $ (?CHO) $ into the benzene ring
An alkyl cyanide forms an amide when it is treated with
The emf of the cell involving the following reaction $ {2Ag^+ + H_2 -> 2Ag + 2H^+} $ is $ 0.80 \,Volt $ . The standard oxidation potential of silver electrode is
A train approaching a railway crossing at a speed of $ 120 \,km/h $ sounds a whistle at frequency $ 640 \,Hz $ when it is $ 300\, m $ away from the crossing. The speed of sound in air is $ 340 \,m/s $ . What will be the frequency heard by a person standing on a road perpendicular to the track through the crossing at a distance of $ 400\, m $ from the crossing?
A plane electromagnetic wave of frequency $25 \,MHz$ travels in free space along the $x$-direction. At a particular point in space and time, $E=6.3 \hat{j} \,V / m$. At this point $B$ is equal to
A particle of mass $m$ moving with speed $v$ towards east strikes another particle of same mass moving with same speed $v$ towards north. After striking, the two particles fuse together. With what speed this new particle of mass $2\,m$ will move in north-east direction?
In diborane, each boron atom uses
A body of mass $m$ rests on a horizontal floor with which it has a coefficient of static friction $\mu$. It is desired to make the body move by applying a minimum possible force $\vec{F}$ as shown in the diagram. The values of $\theta$ and $F_{\min }$ shall be respectively equal to
A body travelling along a straight line traverse one-third the distance with a velocity of $ 5 \,m/s $ . The remaining part of the distance was covered with velocity $ 3 \,m/s $ for half the time and with velocity $ 2 \,m/s $ for the other half of the time. The average velocity of the body over the whole time of motion will be
The wavelength of spectral line coming from a distant star shifts from $600\, nm$ to $600.1\, nm$. The velocity of the star relative to earth is
Resultant of two vectors $\vec{A}$ and $\vec{B}$ is of magnitude $P$. If $\vec{B}$ is reversed, then resultant is of magnitude $Q$. What is the value of $P^2 + Q^2$ ?
For base station to mobile communication, the required frequency band is
What is the refractive index of material of a plano convex lens, if the radius of curvature of the convex surface is $10 \,cm$ and focal length of the lens is $30 \,cm$?
An electron having momentum $2.4 \times 10^{-23} \,kg \,ms ^{-1}$ enters a region of uniform magnetic field of $0.15 \,T$. The field vector makes an angle of $30^{\circ}$ with the initial velocity vector of the electron. The radius of the helical path of the electron in the field shall be
Which of the following releases maximum energy on combustion in $kJ$ per mole state?