Recent questions tagged jeemain

Which of the following expression acquires constant value at equilibrium for the process shown below?

asked Nov 13, 2013 by mosymeow_1

1 answer

Why does the solubilities of anhydrous salts decrease with increase in temperature?

asked Nov 13, 2013 by mosymeow_1

1 answer

Which of the following can exist beyond critical temperature and critical pressure?

asked Nov 13, 2013 by mosymeow_1

1 answer

What happens to a solid whose vapour pressure reaches 760 mm Hg at temperatures which are lower than the triple point?

asked Nov 13, 2013 by mosymeow_1

1 answer

At the boiling point of a liquid its ________ becomes equal to the atmospheric pressure.

asked Nov 13, 2013 by mosymeow_1

1 answer

A black body of mass $34.38\;g$ and surface area$19.2\;cm^2$ is at an initial temperature of $400\;K$. It is allowed to cool inside an evacuated enclosure kept at constant $0.04^{\circ}c$ per second. The specific heat of the body in $J\;kg^{-1} K^{-1}$ is : (Stefan's constant $\sigma = 5.73 \times 10^{-8} Wm ^{-2} K^{-4})$

asked Nov 13, 2013 by meena.p

1 answer

If 4 moles of an ideal monoatomic gas at temperature $400 \;K$ is mixed with 2 moles of another ideal monoatomic gas at temperature $700\;K$ the temperature of the mixture is :

asked Nov 13, 2013 by meena.p

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As melting of ice is an _ process, supplying heat to the system shifts the equilibrium in the direction and viceversa.

asked Nov 13, 2013 by mosymeow_1

1 answer

The pressure and density of a given mass of a diatomic gas $\bigg(\gamma =\large\frac{7}{5}\bigg)$ change adiabatically from $(P,d)\;to \; (P',d'')$. If $\large\frac{d''}{d}$$=32$, then $\large\frac{P'}{P}$ is $(\gamma$= ratio of specific heats)

asked Nov 13, 2013 by meena.p

1 answer

Two identical vessels A and B with frictionless pistons contains the same ideal gas at the same temperature and the same volume V. The masses of gas in A and B and $m_A$ and $m_B$ respectively. The gases are allowed to expand isothermally to the same final volume 2V. The change in pressures of the gas in A and B are found to be $\Delta P$ and $1.5 \Delta\;P$respectively. Then:

asked Nov 13, 2013 by meena.p

1 answer

A metallic solid sphere is rotating about its diameter as axis of rotation . If the temperature is increased by $200^{\circ}C$, the percentage increase in its moment of inertia is : (Coefficient of linear expansion of the metal $=10^{-5/^{\circ}C}$)

asked Nov 13, 2013 by meena.p

1 answer

There are two holes one each along the opposite sides of a wide rectangular tank. The cross- section of each hole is $0.01m^2$ and the vertical distance between the holes is one meter. The tank is filled with water the net force on the tank in newton when the water flows out of the holes is : (Density of water $=1000\;kg/m^3)$

asked Nov 13, 2013 by meena.p

1 answer

Water in a river 20 m deep is flowing at a speed of $10\;ms^{-1}$. The shearing stress between the horizontal layers of water in the river in $Nm^{-2}$ is : (Coefficient of viscosity of water $=10^{-3}SI$ units)

asked Nov 13, 2013 by meena.p

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One end of a uniform glass capillary tube of radius $r=0.025\;cm$ is immersed vertically in water to a depth $h=1\;cm$. The excess pressure in $N/m^2$ required to blow an air bubble out of the tube: (Surface tension of water$= 7 \times 10^{-2} N/m$ Density of water$= 10^3 kg/m^3$ Acceleration due to gravity $=10 m/s^2$)

asked Nov 13, 2013 by meena.p

1 answer

One end of a uniform glass capillary tube of radius $r=0.025\;cm$ is immersed vertically in water to a depth $h=1\;cm$. The excess pressure in $N/m^2$ required to blow an air bubble out of the tube: (Surface tension of water$= 7 \times 10^{-2} N/m$ Density of water$= 10^3 kg/m^3$ Acceleration due to gravity $=10 m/s^2$)

asked Nov 13, 2013 by meena.p

0 answers

Which of the following exhibit discontinuous distribution ?

asked Nov 13, 2013 by thanvigandhi_1

2 answers

A metalic ring of radius r and cross sectional area A is fitted into a wooden circular disc of radius $R(R > 1)$. If the Young's modulus of the material of the ring is Y, the force with which the metal ring expands is :

asked Nov 13, 2013 by meena.p

1 answer

Ductus Botalli connects :

asked Nov 13, 2013 by thanvigandhi_1

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The time period of a simple pendulum is T. When the length is increased by 10 cm,its period is $T_1$. When the length is decreased by 10 cm, its period is $T_2$. Then, the relation between $T,T_1\;and T_2$ is :

asked Nov 13, 2013 by meena.p

1 answer

Select the animal from the examples given below which exhibits neoteny in its larval stage :

asked Nov 13, 2013 by thanvigandhi_1

1 answer

The scientific name of Kashmiri stag is :

asked Nov 13, 2013 by thanvigandhi_1

0 answers

The escape velocity of a body on the earth's surface is $v_e$. A body is thrown up with a speed $\sqrt 5 v_c$. Assuming that the sun and planets do not influence the motion of the body, velocity of the body at infinite distance, is :

asked Nov 13, 2013 by meena.p

1 answer

A particle of mass 1 kg is projected with an initial velocity $10\;ms^{-1}$ at an angle of projection $45^{\circ}$ with the horizontal. The average torque acting on the projectile, between the time at which it is projected and the time at which it strikes the ground, about the point of projection in newton-meter is :

asked Nov 13, 2013 by meena.p

1 answer

Which one of the following arthropods is viviparous ?

asked Nov 13, 2013 by thanvigandhi_1

1 answer

A thin uniform square lamina of side a is placed in the xy-plane with its sides parallel to x and y-axes and with its center coinciding with origin. Its moment of inertia about an axis passing through a point on the y-axis at a distance $y=2a$ and parallel to x-axis is equal to its moment of inertia about an axis passing through a point on the x-axis at a distance $x=d$ and perpendicular to xy-plane. Then value of d is :

asked Nov 13, 2013 by meena.p

1 answer

Statement (S) : Biting and chewing mouth parts are the most primitive type of mouth parts in insects. (Reasons (R) : Holometabolus insects have biting and chewing type of mouth parts in their larvae.

asked Nov 13, 2013 by thanvigandhi_1

0 answers

In cockroach, the thermoreceptor sensilla are present on :

asked Nov 13, 2013 by thanvigandhi_1

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The cells, present in the fat bodies of cockroach, which contains symbiotic bacteria that synthesize amino acids are :

asked Nov 13, 2013 by thanvigandhi_1

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Consider the following statements A and B and identify the correct answer:A : When a person walks on a rough surface the direction of frictional force exerted by the surface on the person is opposite to the direction of his motion. B : When a cycle is in motion, the force of friction exerted by the ground on the front wheel is in the backward direction:

asked Nov 13, 2013 by meena.p

1 answer

In pheretima, the open type of nephridia are located in these segments :

asked Nov 13, 2013 by thanvigandhi_1

0 answers

Two particles of equal mass have velocities $\overrightarrow {v_1}=4 \hat i$ and $\overrightarrow{v_2} =4 \hat j ms^{-1}$. First particle has an acceleration $\overrightarrow{a_1}=(5 \hat i+5 \hat j)ms^{-2}$ while the accleration of the other particle is zero. The center of mass of the two particles moves in a path of :

asked Nov 13, 2013 by meena.p

1 answer

In pheretime, septa are absent between some of the segments. They are :

asked Nov 13, 2013 by thanvigandhi_1

0 answers

Match the following

asked Nov 13, 2013 by thanvigandhi_1

0 answers

The block of mass 2 kg is initially at rest on a horizontal force $\overrightarrow {F}=(9-x^2) \hat i$ newtons acts on it, when the block is at $x=0$. The maximum kinetic energy of the block between $x=0$ and $x=3m$ in joule is :

asked Nov 13, 2013 by meena.p

1 answer

The process by which a new structure is formed in the tissue of the host during parasitic infection :

asked Nov 13, 2013 by thanvigandhi_1

0 answers

The fusion of pronuclei of dissimilar gametes is called :

asked Nov 13, 2013 by thanvigandhi_1

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A 2 kg ball moving at $24 ms^{-1}$ undergoes inelastic head-on collision with a 4 kg ball moving in the opposite direction at $48\;ms^{-1}$. If the coefficient of restitution is $2/3$, their velocities in $ms^{-1}$ after impact are :

asked Nov 13, 2013 by meena.p

1 answer

The horizontal and vertical displacements x and y of a projectile at a given time t are given by $x=6t$ meter and $y=8 t -5t^2$ metre. The range of the projectile in meter is :

asked Nov 13, 2013 by meena.p

1 answer

At a given instant of time two particles are having the position vectors $4 \hat i+4 \hat j+57 \hat k$ metres and $2 \hat i+2 \hat j+5 \hat k$ respectively. If the velocity of the first particle be $0.4 \hat i ms^{-1},$ the velocity of second particle in meter per second if they collide after 10 sec is :

asked Nov 13, 2013 by meena.p

1 answer

Match the following :

asked Nov 13, 2013 by thanvigandhi_1

0 answers

The position of a particle at time t is given by the equation $x(t) =\large\frac{v_0}{A}$$(1-e^{At})\; v_0=$ constant and $A > 0$ . Dimensions of $v_0$ and $A$ respectively are:

asked Nov 13, 2013 by meena.p

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If $\large\frac{dy}{dx}=\frac{y+ x \tan \Large\frac{y}{x}}{x}$ then $\sin \large\frac{y}{x}$ is equal to :

asked Nov 13, 2013 by meena.p

1 answer

Observe the following statements:I. If $dy+2xy\;dx=2e^{-x^{2}} dx $ then $ye^{x^{2}}=2x+c$ II. If $ye^{-x^{2}}-2x=c$ then $dx=(2e^{-x^{2}}-2xy)dy$ Which of the following is a correct statement ?

asked Nov 13, 2013 by meena.p

1 answer

If $x^2 y-x^3 \large\frac{dy}{dx}$$=y^4 \cos x$ then $x^3\;y$ is equal to :

asked Nov 13, 2013 by meena.p

1 answer

If $dx+dy=(x+y)(dx-dy)$ then $\log (x+y)$ is equal to:

asked Nov 13, 2013 by meena.p

1 answer

The area (in square units) bonded by the curves $y^2=4x$ and $x^2=4y$ in the plane is :

asked Nov 13, 2013 by meena.p

1 answer

If $\int \sin ^{-1} \bigg( \large\frac{2x}{1+x^2}\bigg) $$dx-=f(x)-\log (1+x^2)+c$ then $f(x) $ is equal to :

asked Nov 13, 2013 by meena.p

1 answer

$\int \limits_0^{\pi} \large\frac{\theta \sin \theta}{1+\cos ^2 \theta} $$ d \theta$ is equal to :

asked Nov 13, 2013 by meena.p

1 answer

$\int \limits_0^{\pi/2} \large\frac{200 \sin x+100 \cos x}{\sin x+\cos x}$$dx$ is equal to :

asked Nov 13, 2013 by meena.p

1 answer

$\int \large\frac{x^{49} \tan^{-1} (x^{50})}{(1+x^{100})}$$dx=k(\tan^{-1}(x^{50})^2+c$ then k is equal to :

asked Nov 13, 2013 by meena.p

1 answer

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