Recent questions tagged neet

Which one of the following is an amine hormone ?

asked Jul 26, 2018 by pady_1

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The value of $K_{p1}$ and $K_{p2}$ for the reactions $X\rightleftharpoons Y + Z$ ....(1) and $A \rightleftharpoons2B$ ....(2) are in ratio of 9 : 1. If degree of dissociation o X and A be equal, then total pressure at equilibrium (1) and (2) are in the ratio :

asked Jul 26, 2018 by pady_1

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The value of equilibrium constant of the reaction, $HI(g)\rightleftharpoons \frac{1}{2}H_2(g)+\frac{1}{2}I_2(g)$ is 8.0. The equilibrium constant of the reaction, $H_2(g)+I_2(g)\rightleftharpoons2HI(g)$ will be -

asked Jul 26, 2018 by pady_1

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Percentage of free space in a body centered cubic unit cell is -

asked Jul 26, 2018 by pady_1

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The angular shape of ozone molecule$(O_3)$ consists of -

asked Jul 26, 2018 by pady_1

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Which of the following complexes exhibits the highest paramagnetic behaviour ? Where gly = glycine, en = ethylenediamine and bpy = bipyridyl moities (Atomic number Ti = 22, V = 23, Fe = 26, Co = 27)

asked Jul 26, 2018 by pady_1

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Bond dissociation enthalpy of $H_2$ , $Cl_2$ and HCl are 434, 242 and 431 kJ $mol^{ –1}$ respectively. Enthalpy of formation of HCl is -

asked Jul 26, 2018 by pady_1

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Volume occupied by one molecule of water ($density = 1g cm^{ –3}$) is :

asked Jul 26, 2018 by pady_1

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Acetophenone when reacted with a base, $C_2 H_5ONa$, yields a stable compound which has the structure :

asked Jul 26, 2018 by pady_1

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The stability of carbanions in the following : (i) $R-C \equiv \overset{\Theta}{C}$ (ii) <img src =" "/> (iii) $R_2C=\overset{\Theta}{CH}$ (iv) $R_3Câ€“\overset{\Theta}{C}H_2$ is in the order of :

asked Jul 26, 2018 by pady_1

1 answer

The sequence of ionic mobility in aqueous solutions is -

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Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH ?

asked Jul 26, 2018 by pady_1

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Base strength of - (i) $H_3C\overset{\Theta}{C} H_2$ (ii) $H_2C=\overset{\Theta}{C} H$ and (iii) $H-C \equiv \overset{\Theta}{C}$ is in the order of -

asked Jul 26, 2018 by pady_1

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In DNA, the complementary bases are -

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The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of -

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Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the $H^+$ ion concentration in the mixture ?

asked Jul 26, 2018 by pady_1

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What volume of oxygen gas ($O_2$ ) measured at 0ºC and 1 atm, is needed to burn completely one litre, of propane gas ($C_3H_8$) measured under the same conditions ?

asked Jul 26, 2018 by pady_1

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Which one of the following arrangements does not give the correct picture of the trends indicated against it ?

asked Jul 26, 2018 by pady_1

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A cell can be balanced against 110 cm and 100 cm of potentiometer wire, respectively with and without being short circuited through a resistance of $10 \Omega$. Its internal resistance is -

asked Jul 26, 2018 by pady_1

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The ratio of the radii of gyration of a circular disc to that of a circular ring, each of same mass and radius around their respective axes is -

asked Jul 26, 2018 by pady_1

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A circular disc of radius 0.2 metre is placed in uniform magnetic field of induction $\frac{1}{\pi}[\frac{Wb}{m^2}]$ in such a way that its axis makes an angle of $60^o$ with $\overrightarrow{B}$ . The magnetic flux linked with the disc is -

asked Jul 26, 2018 by pady_1

2 answers

A roller coaster is designed such that riders experience "weightlessness" as they go round the top of a hill whose radius of curvature is 20m. The speed of the car at the top of the hill i between -

asked Jul 26, 2018 by pady_1

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At 10ºC the value of the density of a fixed mass of an ideal gas divided by its pressure is x. At 110ºC this ratio is -

asked Jul 26, 2018 by pady_1

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Three forces acting on a body are shown in the figure. To have the resultant force only along the y-direction, the magnitude of the minimum additional force needed is -

asked Jul 26, 2018 by pady_1

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In an A.C. circuit the emf (e) and the current (i) at any instant are given respectively by : $e=E_0 \sin \omega t$ $i=I_0 \sin(\omega t-\phi)$ The average power in the circuit over one cycle of A.C. is -

asked Jul 26, 2018 by pady_1

2 answers

A shell of mass 200 g is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The initial velocity of the shell is

asked Jul 26, 2018 by pady_1

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A galvanometer of resistance 50 $\Omega$ is connected to a battery of 3V along with a resistance of 2950 $\Omega$ in series. A full scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be -

asked Jul 26, 2018 by pady_1

2 answers

The voltage gain of an amplifier with 9 % negative feedback is 10. The voltage gain without feedback will be -

asked Jul 26, 2018 by pady_1

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The ground state energy of hydrogen atom is –13.6 eV. When its electron is in the first excited state, its excitation energy is -

asked Jul 26, 2018 by pady_1

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The energy required to charge a parallel plate condenser of plate separation d and plate area of cross-section A such that the uniform electric field between the plates is E, is :

asked Jul 26, 2018 by pady_1

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Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 10 % of energy. How much power is generated by the turbine ? (g = 10${\frac{m}{s}}^ 2$)

asked Jul 26, 2018 by pady_1

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If the lattice parameter for a crystalline structure is 3.6 Å, then the atomic radius in fcc crystal i

asked Jul 26, 2018 by pady_1

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Two simple Harmonic Motions of angular frequency 100 and 1000 rad $s^{–1}$ have the same displacement amplitude. The ratio of their maximum accelerations is -

asked Jul 26, 2018 by pady_1

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Two points are located at a distance of 10 m and 15 m from the source of oscillation. The period of oscillation is 0.05 sec and the velocity of the wave is 300 m/s. What is the phase difference between the oscillations of two points ?

asked Jul 26, 2018 by pady_1

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The velocity of electromagnetic radiation in a medium of permittivity $\epsilon_0$ and permeability $\mu_0$ is given by :

asked Jul 26, 2018 by pady_1

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The electric potential at a point in free space due to a charge Q coulomb is $Q\times 10^{11}$ volts. The electric field at that point is -

asked Jul 26, 2018 by pady_1

1 answer

A p-n photodiode is made of a material with a band gap of 2.0 eV. The minimum frequency of the radiation that can be absorbed by the material is nearly :

asked Jul 26, 2018 by pady_1

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A thin rod of length L and mass M is bent at it midpoint into two halves so that the angle between them is 90º. The moment of inertia of the bent rod about an axis passing through the bending point and perpendicular to the plane defined by the two halves of the rod is -

asked Jul 26, 2018 by pady_1

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The circuit is equivalent to

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If the error in the measurement of radius of a sphere is 2 % then the error in the determination of volume of the sphere will be -

asked Jul 26, 2018 by pady_1

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In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of -

asked Jul 26, 2018 by pady_1

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An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from temperature $20^oC$ ? The temperature of boiling water is $100^oC$.

asked Jul 26, 2018 by pady_1

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Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary to keep the belt moving with a constant velocity of v m/s will be -

asked Jul 26, 2018 by pady_1

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A particle of mass 1 mg has the same wavelength as an electron moving with a velocity of $3\times10^ 6 ms^{–1}$. The velocity of the particle is : (mass of electron = $9.1\times10^{–31}$ kg)

asked Jul 26, 2018 by pady_1

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The distance travelled by a particle starting from rest and moving with an acceleration $\frac{4}{3}ms^{-2}$, in the third second is

asked Jul 26, 2018 by pady_1

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A particle of mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field of induction $\overrightarrow{B}$ . After 3 seconds the kinetic energy of the particle will be -

asked Jul 26, 2018 by pady_1

2 answers

A long solenoid has 500 turns. When a current of 2 ampere is passed through it, the resulting magnetic flux linked with each turn of the solenoid is $4\times 10^{–3}$ Wb. The self-inductance of the solenoid is -

asked Jul 26, 2018 by pady_1

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A particle of mass m is projected with velocity v making an angle of $45^o$ with the horizontal from level ground. When the particle lands on the level ground the magnitude of the change in its momentum will be -

asked Jul 26, 2018 by pady_1

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Lysozyme that is present in perspiration, saliva and tears, destroys:

asked Jul 26, 2018 by pady_1

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Ultrasound of how much frequency is beamed into human body for sonography ?

asked Jul 26, 2018 by pady_1

2 answers

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