List of top Questions asked in AMUEEE

The ratio of the half-life time $ (t_{1/2}) $ , to the three quarter life-time, $ (t_{3/4}) $ , for a reaction that is second order

$ 0.002\, M $ solution of a weak acid has an equivalent conductance $ (\wedge) 60\, ohm^{-1}\, cm^{2}\, eq^{-1} $ . What will be the $ pH $ ? (Given : $ \wedge = 400 \, ohm^{-1} \, cm^{2} \, eq^{-1} $ ]

The electrode potential, $ E^{\circ} $ , for the reduction of $ MnO^{-}_{4} $ to $ Mn^{2+} $ in acidic medium is $ +1.51\, V $ . Which of the following metal(s) will be oxidised? The reduction reactions and standard electrode potentials for $ Zn^{2+}, Ag^{+} $ , and $ Au^{+} $ are given as $ Zn^{2+} (aq) +2e \to Zn(s), E^{\circ} = -0.762\, V $ $ Ag+ (aq) +e {\rightleftharpoons} Ag (s), E^{\circ}=+0.80 \,V $ $ Au^{+} (aq) +e {\rightleftharpoons} Au(s), E^{\circ}+1.69\,V $

Three particles, two with masses $ m $ and one with mass $ M $ , might be arranged in any of the four configurations shown below. Rank the configurations according to the magnitude of the gravitational force on $ M $ , least to greatest

The $ EAN $ value $ y \left[Ti\left(\sigma-C_{6}H_{5}\right)_{2}\left(\pi-C_{5}H_{5}\right)_{2}\right]^{0} $ is

The only force acting on a $ 2 \,kg $ body that is moving in $ xy- $ plane has a magnitude of $ 5\, N $ . The body initially has a velocity of $ 4 \,m/s $ in the positive $ x $ -direction. Some time later, the body has a velocity of $ 6 \,m/s $ in the positive $ y- $ direction. The work done on the body by the $ 5 \,N $ force during this time is

The standard emf of the cell $ (E^{\circ}_{cell} $ and equilibrium constant $ (K_{eq}) $ of the following reaction of $ 298\, K $ $ Cd^{2+} + 4NH_{3} {\rightleftharpoons} Cd (NH_{3})^{2+}_{4} $

Figure shows a potentiometer. Length of the potentiometer wire $ AB $ is $ 100 \,cm $ and its resistance is $ 100\, \Omega $ . $ EMF $ of the battery $ E $ is $ 2 V $ . A resistance $ R $ of $ 50 \Omega $ draws current from the potentiometer. What is the voltage across $ R $ when the sliding contact $ C $ is at the mid-point of $ AB $ ?

Figure shows a potentiometer. Length of the potentiometer wire $ AB $ is $ 100 \,cm $ and its resistance is $ 100\, \Omega $ . $ EMF $ of the battery $ E $ is $ 2 V $ . A resistance $ R $ of $ 50 \Omega $ draws current from the potentiometer. What is the voltage across $ R $ when the sliding contact $ C $ is at the mid-point of $ AB $ ?

If $ \chi_{1} $ and $ \chi_{2} $ represent the mole fractions of a component $ A $ in the vapour phase and liquid mixture respectively, and $ p^{\circ}_{A} $ and $ p^{\circ}_{B} $ represent vapour pres sines of pure A and pure B, then total vapour pressure of liquid mixture is

The time-period of a physical pendulum is $ 2\pi\sqrt{I /mgd} $ , where $ I $ is the moment of inertia of the pendulum about the axis of rotation and $ d $ is perpendicular distance between the axis of rotation and the centre of mass of the pendulum A circular ring hangs from a nail on a wall. The mass of the ring is $ 3 \,kg $ and its radius is $ 20\, cm $ . If the ring is slightly displaced, the time of resulting oscillations will be

The rate constant, the activation energy and the Arrhenius parameter of a chemical reaction at $ 25^{\circ}C $ are $ 3.0 \times 10^{-4} \, s^{-1} $ , $ 104.4 \, kJ \, mol^{-1} $ and $ 6.0 \times 10^{14} \, s^{-1} $ , respectively. The value of the rate constant at $ T \rightarrow \infty $ is

Figure shows three arrangements of electric field lines. In each arrangement, a proton is released from rest at point $ A $ and then accelerated through point $ B $ by the electric field. Points $ A $ and $ B $ have equal separations in the three arrangements. If $ p_{1}, p_{2} $ and $ p_{3} $ are linear momentum of the proton at point $ B $ in the three arrangement respectively, then

The air pressure at sea level is $ 101325 \,Pa $ . At the centre of a rarefaction of a sound wave in air, the pressure is $ 91000 \,Pa $ . Which is the most likely pressure at the centres of a compression of the same wave?

A rocket is moving at a speed of $ 200 \,m/s $ towards a stationary target. While moving it emits a wave of frequency $ 1000 \,Hz $ . Some of the sound reaching the target gets reflected back to the rocket as an echo. The frequency of the echo as detected by the rocket is (velocity of sound $ = 330 \,m/s $ )

Which of the following is an example of thermosetting polymers?

Which one of the following set of metals deposits an anode mud during the process of electrolytic refining of copper?

Two different coils have self-inductance $ L_{1} = 9 \,mH $ and $ L_{2} = 3\, mH $ . At a certain instant, the current in the two coils is increasing at the same rate and the power supplied to the coils is also the same. The ratio of the energy stored in the two coils $ (U_{1} / U_{2}) $ at that instant is

The nearest star to our solar system is $ 4.3 $ light years away. The distance of this star in Parsec is (Mean distance between the earth and the sun $ = 1.5 \times 10^{11}\, m $ and one light year $ = 9.46 \times 10^{15} \, m $ )

The most reactive to nucleophilic attack at the carbonyl group is

In Young's double slit experiment using monochromatic light of wavelength $ \lambda $ . the intensity of light at a point on the screen where path difference is $ \lambda $ , is $ k $ units. The intensity of light at a point, where path difference is $ \lambda /3 $ is

Consider the following statements about the four fundamental forces in nature (i) The strong nuclear force binds protons and neutrons in a nucleus (ii) The strong nuclear force is about $ 10^{3} $ times the electromagnetic force in strength (iii) The weak nuclear force is the weakest of all the four fundamental forces (iv) The range of the weak nuclear is about $ 10^{-16}\, m $ . The correct statement (s) is (are)

An $\alpha$ - particle accelerated through V volt is fired towards a nucleus.Its distance of closest approach is r.If a proton is accelerated through the same potential and fired towards the same nucleus,the distance of closest approach of proton will be:

Amongst the following interhalogen compounds which one is used for the production of $ UF_{6} $ during $ ^{235}U $ enrichment process?

A smooth block is released at rest on a 45$^{\circ}$ incline and then slides a distance $d$. The time taken to slide is $n$ times as much to slide on rough incline than on a smooth incline. The coefficient of friction is