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Physics
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Assertion (A) : According to Lowry-Bronsted theory, a substance can function as an acid as well as a base. Reasons (R) : Acid reacts with a base to produce a salt.
jeemain
eamcet
chemistry
2010
q135
asked
Nov 20, 2013
by
thanvigandhi_1
0
answers
What is the effect of a ten-fold increase in pressure on $k_p$ in the reaction $ N_2(g)\: 3H_2(g) \: \leftrightharpoons \: 2\: NH_3 (g) $ at equilibrium ?
jeemain
eamcet
chemistry
2010
q134
asked
Nov 20, 2013
by
thanvigandhi_1
0
answers
For the reaction $A+3b \rightarrow 2C+D$, which one of the following is not correct?
jeemain
eamcet
chemistry
2010
q134
asked
Nov 20, 2013
by
thanvigandhi_1
1
answer
A crystalline solid substance has a density of $10 g/cm^3$ and the length of the edge of the unit cell (FCC) is 2.0 A. How many number of atoms are present in 200 grams of the solid ?
jeemain
eamcet
chemistry
2010
q132
asked
Nov 20, 2013
by
thanvigandhi_1
1
answer
What is the e.m.f of the cell for the reaction $ Fe^{2+} + Zn \rightarrow Zn^{2+} + Fe$ ? Given that $ E^0_{Zn|Zn^{2+}(1.0M) }=0.76\: V \: and \: E^0_{Fe|Fe^{2+}(1.0M) }=0.41\: V $
jeemain
eamcet
chemistry
2010
q131
asked
Nov 20, 2013
by
thanvigandhi_1
0
answers
If the solution of copper sulphate in which a copper rod is immersed, is diluted 100 times, what is the change in electrode potential ( Reduction ) ?
jeemain
eamcet
chemistry
2010
q130
asked
Nov 20, 2013
by
thanvigandhi_1
1
answer
What is the volume of $ 0.1\: M \: H_2SO_4$ required in litres to neutralize completely 1 litre of a solution containing 20 g of $NaOH$ ?
jeemain
eamcet
chemistry
2010
q129
asked
Nov 20, 2013
by
thanvigandhi_1
0
answers
Which one of the following $ 1.0 \times 10^{-3}$ molal aqueous solutions has the highest boiling point ?
jeemain
eamcet
chemistry
2010
q128
asked
Nov 20, 2013
by
thanvigandhi_1
0
answers
Equal weights of Methane and Oxygen are mixed in an empty container at $25^{\circ}C$. The fraction of the total pressure exerted by Oxygen is :
jeemain
eamcet
chemistry
2010
q127
asked
Nov 20, 2013
by
thanvigandhi_1
0
answers
0.14 g of an element on combustion gives 0.28 g of its oxide. What is that element ?
jeemain
eamcet
chemistry
2010
q126
asked
Nov 20, 2013
by
thanvigandhi_1
1
answer
Molecular orbital theory was proposed by:
jeemain
eamcet
chemistry
2010
q125
asked
Nov 20, 2013
by
thanvigandhi_1
0
answers
The refracting angle of a prism is A and the refractive index of the material of the prism is $\cot (A/2)$. The angle of minimum deviation of the prism is :
jeemain
eamcet
physics
2004
q24
asked
Nov 20, 2013
by
meena.p
1
answer
Assertion (A): Optical fibres are widely used in communication network. Reason (R): Optical fibers are small in size, light weight, flexible and there is no scope for interference in them.
jeemain
eamcet
physics
2004
q23
asked
Nov 20, 2013
by
meena.p
1
answer
Assertion (A): Optical fibres are widely used in communication network. Reason (R): Optical fibers are small in size, light weight, flexible and there is no scope for interference in them.
jeemain
eamcet
physics
2004
q23
asked
Nov 20, 2013
by
meena.p
0
answers
An iron load of 2 kg is suspended in air from the free end of a sonometer wire of length 1 m. A tuning fork is : (Specific gravity of iron=8)
jeemain
eamcet
physics
2004
q22
asked
Nov 20, 2013
by
meena.p
0
answers
The wavelengths of two notes in air are $\large\frac{36}{195}$$m$ and $\large\frac{36}{193}$$m$. Each note produces 10 beats per second separately with a third note of fixed frequency.The velocity of sound in air in m/s is :
jeemain
eamcet
physics
2004
q21
asked
Nov 20, 2013
by
meena.p
1
answer
The correct order of magnitude of bond angles among the compounds $ CH_4, NH_3 \: and \: H_2O$ is:
jeemain
eamcet
chemistry
2010
q124
asked
Nov 18, 2013
by
thanvigandhi_1
0
answers
The incorrect order of second ionization energies in the following is :
jeemain
eamcet
chemistry
2010
q123
asked
Nov 18, 2013
by
thanvigandhi_1
0
answers
In a hydrogen atom, the electron is at a distance of 4.768 A from the nucleus. The angular momentum of the electron is :
jeemain
eamcet
chemistry
2010
q122
asked
Nov 18, 2013
by
thanvigandhi_1
1
answer
The radial probability distribution curve obtained for an orbital wave function $ \Psi $ has 3 peaks and 2 radial nodes. The valence electron of which one of the following metals does this wave function $ ( \Psi )$ correspond to ?
jeemain
eamcet
chemistry
2010
q121
asked
Nov 18, 2013
by
thanvigandhi_1
0
answers
In the figures shown below :
jeemain
eamcet
physics
2010
q120
asked
Nov 18, 2013
by
thanvigandhi_1
0
answers
If 200 MeV of energy is released in the fission of 1 nucleus of $_{92}U^{235}$, the number of nuclei that undergo fission to produce energy of 10 kwh in one second :
jeemain
eamcet
physics
2010
q119
asked
Nov 18, 2013
by
thanvigandhi_1
1
answer
The surface of a metal has work function 2.66 e V. This is illuminated with photons of wavelength 450 nm. Te de Broglie wavelength of the emitted photoelectrons is : ( Mass of electron = $9 \times 10^{-31}$ kg)
jeemain
eamcet
physics
2010
q118
asked
Nov 18, 2013
by
thanvigandhi_1
1
answer
The threshold frequency of the metal of the cathode in a photoelectric cell is $ 1 \times 10^{15}\: Hz$ . When a certain beam of light is incident on the cathode, it is found that a stopping potential '4.144 V' is required to reduce the current to zero. The frequency of the incident radiation is : $ ( h = 6.63 \times 10^{-34} J-s)$
jeemain
eamcet
physics
2010
q117
asked
Nov 18, 2013
by
thanvigandhi_1
3
answers
A wire loop PQRSP is constructed by joining two semi - circular coils of radii $'r_1'\: and \: 'r_2'$ respectively as shown in the figure. If the current flowing in the loop is $'i'$ , then the magnetic induction at the point $'O'$ is :
jeemain
eamcet
physics
2010
q116
asked
Nov 18, 2013
by
thanvigandhi_1
1
answer
A metal rod of length 2 m is rotating with an angular velocity of 100 radiance / second in a plane perpendicular to a uniform magnetic field of 0.3 T. The potential difference between the ends of rod is :
jeemain
eamcet
physics
2010
q115
asked
Nov 18, 2013
by
thanvigandhi_1
1
answer
A wire of length 6.28 m is bent into a circular coils of 2 turns. If a current of 0.5 A exists in the coil, the magnetic moment of the coil is, in $ A-M^2$ :
jeemain
eamcet
physics
2010
q114
asked
Nov 18, 2013
by
thanvigandhi_1
1
answer
For a thermocouple the temperature of cold junction $(T_c)$ neutral temperature $(T_n) $ and temperature of inversion $(T_i)$ are $ 0^{\circ}C, 285^{\circ}C\: and \: 585^{\circ}C$ respectively. If the temperature of cold junction is raised to $ 10^{\circ}C$ then :
jeemain
eamcet
physics
2010
q113
asked
Nov 18, 2013
by
thanvigandhi_1
1
answer
The current voltage graph for a given metallic wire at two different temperatures $T_1\: and \: T_2$ is shown in the figure. The temperature $T_1\: and \: T_2$ are related as :
jeemain
eamcet
physics
2010
q112
asked
Nov 18, 2013
by
thanvigandhi_1
1
answer
A battery of e.m.f 2.1 V and internal resistance $0.05 \Omega$ is shunted for 5 seconds by a wire of constant resistance $ 0.02 \Omega$ , mass 1 g and specific heat $ 0.1 cal/g/^{\circ}C$ . The rise in the temperature of the wire is :
jeemain
eamcet
physics
2010
q111
asked
Nov 18, 2013
by
thanvigandhi_1
1
answer
Four charges of magnitude - 'Q' are placed at the four corners of a square and a charge 'q' is at its centre. If the system is in equilibrium the value of 'q' is :
jeemain
eamcet
physics
2010
q110
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
The plates in a parallel plate capacitor are seperated by a distance 'd' with air as a medium between the plates. In order to increase the capacity by 66%, a dielectric slab of dielectric constant '5' is introduced between the plates. What is the thickness of the dielectric slab ?
jeemain
eamcet
physics
2010
q109
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
A short bar magnet is arranged with its North pole pointing geographical North. It is found that the horizontal component of Earth's magnetic induction ($B_H$) is balanced by the magnetic induction of the magnet at a point which is at a distance of 20 cm from its center . The magnetic moment of the magnet is : $( If \: B_H = 4 \times 10^{-5}\: Wb\: m^{-2})$:
jeemain
eamcet
physics
2010
q108
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
A short magnet oscillating in vibration magnetometer with a frequency 10 Hz . A downward current of 15 A is established in a long vertical wire placed 20 cm to the west of the magnet. The new frequency of the short magnet is : ( The horizontal component of earth's magnetic field is 12 $ \mu$ T)
jeemain
eamcet
physics
2010
q107
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
If the ratio of maximum and minimum intensities of an interference pattern is 36 : 1, then the ratio of amplitudes of the two interfering waves will be :
jeemain
eamcet
physics
2010
q106
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
A thin prism of angle $ 6^{\circ}$ made up of glass of refractive index 1.5 is combined with another prism made up of glass of refractive index 1.75 to produce dispersion without deviation. The angle of second prism is :
jeemain
eamcet
physics
2010
q105
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
The magnification produced by an astronomical telescope for normal adjustment is 10 and the length of the telescope is 1.1 m. The magnification, when the image is formed at least distance of distinct vision is :
jeemain
eamcet
physics
2010
q104
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
A ray of light travels from an optically denser medium towards rarer medium. The critical angle for the two media is 'C'. The maximum possible angle of deviation of the ray is :
jeemain
eamcet
physics
2010
q103
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
A sound wave travels with a velocity of $ 300\: ms^{-1}$ through a gas. 9 beats are produced in 3 sec when two waves pass through it simultaneously. If one of the waves has 2 m wavelength, the wavelength of the other wave is :
jeemain
eamcet
physics
2010
q102
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
A source of sound producing wavelength of 50 cm is moving away from stationary observer with $ \large\frac{1}{5}th $ speed of sound. Then, what is the wavelength of sound heard by observer ?
jeemain
eamcet
physics
2010
q101
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
A cylinder of radius 'R' made of material of coefficient of thermal conductivity $'k_1'$ is surrounded by a cylindrical shell of inner radius 'R' and outer radius 2 R made of a material of coefficient of thermal conductivity $'k_2'$ . The two ends of the combined system are maintained at two different temperatures. There is no loss of heat across the cylindrical surface and the system is in the steady state. The effective coefficient of thermal conductivity of the system is :
jeemain
eamcet
physics
2010
q100
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
A lead bullet of unknown mass is fired with a speed of $ 180 \: ms^{-1}$ into a tree in which it stops. Assuming that in this process two third of heat produced goes into the bullet and one third into wood. The temperature of the bullet raises by : ( Specific heat of lead $= 0.120 \: Jg^{-1\circ}C^{-1}$)
jeemain
eamcet
physics
2010
q99
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
One mole of an ideal gas ( y = 1.4 ) is adiabatically compressed so that its temperature rises from $ 27^{\circ} C \: to \: 35^{\circ}C$. The change in the internal energy of the gas is $(R=8.3\: J \: mol^{-1}K^{-1}$) :
jeemain
eamcet
physics
2010
q98
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
The pressure P for a gas is plotted against its absolute temperature T for two different volumes $V_1\: and \: V_2$ where $ V_1 > V_2$ . If P is plotted on $y$ - axis and T on $x$ - axis then :
jeemain
eamcet
physics
2010
q97
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
An ideal gas is initially at temperature T and volume V. Its volume is increased by $ \Delta V$ due to an increase in temperature $ \Delta T$ , pressure remaining constant. The physical quantity $ \delta = \large\frac{\Delta V}{V \Delta T}$ varies with temperature as :
jeemain
eamcet
physics
2010
q96
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
A tank of height 5 m is full of water. There is a hole of cross sectional area $1\: cm^2$ in its bottom. The value of water that will come out from this hole per second is ($ g = 10 m/s^2$)
jeemain
eamcet
physics
2010
q95
asked
Nov 16, 2013
by
thanvigandhi_1
1
answer
A spherical liquid drop of diameter D breaks up to n identical spherical drops. If the surface tension of the liquid is $' \sigma'$ is , the change in energy in this process is :
jeemain
eamcet
physics
2010
q94
asked
Nov 16, 2013
by
thanvigandhi_1
1
answer
A 4.0 m long copper wire of cross sectional area $ 1.2 \: cm^2$ is stretched by a force of $ 4.8 \times 10^3N$ If Young's modulus for copper is $ Y = 1.2 \times 10^{11}\: N/m^2$ , the increase in length of wire and strain energy stored per unit volume are :
jeemain
eamcet
physics
2010
q93
asked
Nov 16, 2013
by
thanvigandhi_1
1
answer
A mass M is suspended from a light spring. An additional mass m is added, displaces the spring further by a distnce 'x'. Now the combined mass will oscillate with a period :
jeemain
eamcet
physics
2010
q92
asked
Nov 16, 2013
by
thanvigandhi_1
1
answer
The period of revolution of Jupiter around the sun is 12 times the period of revolution of the earth around the sun. The distance between the Jupiter and sun is n times the distance between the earth and sun. Then the value of n is :
jeemain
eamcet
physics
2010
q91
asked
Nov 16, 2013
by
thanvigandhi_1
1
answer
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