Email
Chat with tutors
Login
Ask Questions, Get Answers
Menu
X
home
ask
tuition
questions
practice
papers
mobile
tutors
pricing
X
Recent questions in JEEMAIN and NEET
Questions
>>
JEEMAIN and NEET
JEEMAIN and NEET
Mathematics
Physics
Chemistry
Biology
NEET PAST PAPERS
JEEMAIN PAST PAPERS
Relative lowering of vapour pressure is directly proportional to
colligative-properties
lowering-vapour-pressure
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
basics
easy
asked
Feb 12, 2014
by
sreemathi.v
1
answer
Which one of the following aqueous solution posses lowest vapour pressure?
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
colligative-properties
lowering-vapour-pressure
vant-hoff
basics
easy
asked
Feb 12, 2014
by
sreemathi.v
1
answer
An object is placed at a distance of 10 cm to left on axis of a convex lens A of focal length 20 cm.Another convex lens of focal length 10 cm is placed co-axially to the right of the lens A at a distance of 5 cm from A. Find the magnification of final image
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
refraction-at-spherical-surfaces-and-lenses
difficult
asked
Feb 12, 2014
by
meena.p
1
answer
A solid conducting sphere of radius a having a charge q is surrounded by a concentric conducting spherical shell of inner radius 2a and outer radius as shown in figure . Find the amount of heat produced when switch is closed
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatics-of-conductors
difficult
asked
Feb 12, 2014
by
yamini.v
1
answer
The colligative properties depend upon
jeemain
chemistry
class12
ch2
solutions
q20
easy
colligative-properties
basics
asked
Feb 12, 2014
by
sreemathi.v
1
answer
Which one of the following is considered as colligative property?
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
basics
easy
colligative-properties
osmotic-pressure
asked
Feb 12, 2014
by
sreemathi.v
1
answer
A glass convex lens of refractive index $\large\frac{3}{2}$ has got a focal length equal to $50 \;cm$ Find the focal length of lens if it is immersed in ethyl alcohol of $refractive index \;1.36$
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
refraction-at-spherical-surfaces-and-lenses
medium
asked
Feb 12, 2014
by
meena.p
1
answer
How many moles of water are present in 90g of water?
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
composition-of-a-solution
easy
asked
Feb 12, 2014
by
sreemathi.v
1
answer
Calculate the amount of ammonium sulphate required to prepare 500ml of 1 molar solution of ammonium sulphate? (m.wt of $(NH_4)_2SO_4$ is 132.14gm/mol)
composition-of-a-solution
easy
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
asked
Feb 12, 2014
by
sreemathi.v
1
answer
A parallel beam of light travelling in water $(\mu =\large\frac{4}{3})$ is refracted through a spherical air bubble of radius R .. Find the location of image formed after refraction at two surfaces.
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
rafraction-at-sphericalsurfaces-and-lenses
difficult
asked
Feb 12, 2014
by
meena.p
1
answer
If the molar mass of glucose is 180.2 g mol$^{-1}$ and if 36 gm of glucose $C_6H_{12}O_6$ is present in 1000 gm of an aqueous solution of glucose,it is said to be
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
composition-of-a-solution
basics
easy
asked
Feb 12, 2014
by
sreemathi.v
1
answer
Six charges are placed at the certices of a regular hexagon as shown in the figure . The electric field on the line passing through point O and perpendicular to the plane of the figure as a function of distance x from point O is $\;(x > > a)$
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-field
difficult
asked
Feb 12, 2014
by
yamini.v
1
answer
One molal solution indicates
composition-of-a-solution
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
basics
asked
Feb 12, 2014
by
sreemathi.v
1
answer
A prism of crown glass refracting angle of $50^{\circ}$ and mean refractive index $=1.51$ is combined with one flint glass prism of refractive index $=1.65$ to produce no deviation Then the angle of flint glass is
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
refraction-by-prism
difficult
asked
Feb 12, 2014
by
meena.p
1
answer
Solubility of a substance in a solvent depends upon
composition-of-a-solution
solubility
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
basics
asked
Feb 12, 2014
by
sreemathi.v
1
answer
Two point charges a and b whose magnitudes are same positioned at a certain distance along the positive x-axis from each other . a is at origin and b is at a distance $\;x_{0}\;$ from a . Graph is drawn between electrical field strength and distance x from a . E is taken positive if it is along the line joining from a to b . Then
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-field
difficult
asked
Feb 12, 2014
by
yamini.v
1
answer
How much mass of urea $(NH_2CONH_2)$ is required in preparing 5 kg of 0.50 molal solution? (M.wt of urea=60g)
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
composition-of-a-solution
medium
asked
Feb 12, 2014
by
sreemathi.v
1
answer
If 50ml of 0.5M $H_2SO_4$ is diluted to 1000 ml, what is the molarity of diluted solution?
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
composition-of-a-solution
easy
asked
Feb 12, 2014
by
sreemathi.v
1
answer
What is the molarity of solution, if 60g of $Co(NO_3)_2.6H_2O$ dissolved in 4.3L of solution ?
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
composition-of-a-solution
easy
asked
Feb 12, 2014
by
sreemathi.v
1
answer
What is the mole fraction of benzene in solution containing 20% by mass in $CCl_4$?
jeemain
chemistry
class12
ch2
solutions
q10
easy
composition-of-a-solution
concentration
physical-chemistry
asked
Feb 12, 2014
by
sreemathi.v
1
answer
The dispersive power of crown and flint glasses are 0.03 and 0.05 respectively . If difference in refractive indices of blue and red colours is 0.014 for crown glass and 0.023 for flint glass . Then the angle of two prisms for a deviation of $10^{\circ}$ (with out dispersion )
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
refraction-by-prism
difficult
asked
Feb 12, 2014
by
meena.p
1
answer
What is mass percentage of benzene $(C_6H_6)$ in carbon tetrachloride $(CCl_4)$ if 20g of benzene is dissolved in 180g of $CCl_4$?
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
composition-of-a-solution
easy
asked
Feb 12, 2014
by
sreemathi.v
1
answer
A sample of $H_2SO_4$ solution is labeled 98% by weight. What is the normality of acid, given that the density of $H_2SO_4$ solution is 1.8g/ml.
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
composition-of-a-solution
easy
asked
Feb 12, 2014
by
sreemathi.v
1
answer
A sample of $H_2SO_4$ solution is labeled 98% by weight. What is the molarity of acid, given that the density of $H_2SO_4$ solution is 1.8g/ml.
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
composition-of-a-solution
easy
asked
Feb 12, 2014
by
sreemathi.v
1
answer
The ratio between the rms Speed of $H_2$ at 50K and that of $O_2$ at 800K is :
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
ideal-gas-equation
easy
q12
asked
Feb 12, 2014
by
sharmaaparna1
1
answer
Molarity of NaOH solution containing 5g of NaOH in 450ml of solution?
jeemain
chemistry
class12
unit2
solutions
q6
easy
asked
Feb 12, 2014
by
sreemathi.v
1
answer
In Van der waal's equation of state of the gas law the constant 'b' is a measure of :
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
gas-laws
easy
q11
asked
Feb 12, 2014
by
sharmaaparna1
1
answer
As the temperature is raised from $20^{\large\circ}C \;to \;40^{\large\circ}C$ , the average kinetic energy of neon atoms changes by a factor.
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
kinetic-molecular-theory-of-gases
easy
q10
asked
Feb 12, 2014
by
sharmaaparna1
1
answer
What is the mole fraction of water in 20% w/w ethylene glycol solution?
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
composition-of-a-solution
easy
asked
Feb 12, 2014
by
sreemathi.v
1
answer
According to kinetic theory of gases in an ideal gas between two successive collisions a gas molecule travels:
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
kinetic-molecular-theory-of-gases
easy
q9
asked
Feb 12, 2014
by
sharmaaparna1
1
answer
What is the mole fraction of ethylene glycol $(C_2H_6O_2)$ in a solution containing 20% ethylene glycol by mass?
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
composition-of-a-solution
easy
asked
Feb 12, 2014
by
sreemathi.v
1
answer
A uniform electric field of strength $\;\overrightarrow{E}\;$ exists in a region . An electron enters a point $A$ with velocity $v$ as shown . It moves through the electric field and reaches at point $B$ . Velocity of particle at $B$ is $2v$ at $30^{\circ}\;$ with x - axis . Then electric field $\;\overrightarrow{E}\;$ is
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-field
difficult
asked
Feb 12, 2014
by
yamini.v
1
answer
Which of the following is an example of solid solution?
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
easy
composition-of-a-solution
asked
Feb 12, 2014
by
sreemathi.v
1
answer
For an ideal gas , number of moles per litre in terms of its pressure P , gas constant R and temperature T is
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
ideal-gas-equation
easy
q8
asked
Feb 12, 2014
by
sharmaaparna1
1
answer
Calculate the dispersive power for crown glass from given data. $\mu_v= 1.523 $ and $\mu_R=1.5145$
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
refraction-by-prism
medium
asked
Feb 12, 2014
by
meena.p
1
answer
Which of the following is in an example of liquid solution?
composition-of-a-solution
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
basics
easy
asked
Feb 12, 2014
by
sreemathi.v
1
answer
Find the dispersion produced by a thin prism of $18^{\circ}$ having refractive index fro red light $= 1.56$ and for violet light $=1.68$
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
refraction-by-prism
medium
asked
Feb 12, 2014
by
meena.p
1
answer
Kinetic theory of gases proves
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
kinetic-molecular-theory-of-gases
easy
q7
asked
Feb 12, 2014
by
sharmaaparna1
1
answer
In the diagram shown , the charge +Q is fixed another charge +2q and mass M is projected from a distance R from the fixed charge . Minimum separation between the charges if the velocity becomes $\;\large\frac{1}{\sqrt{3}}\;$ times of the projected velocity , at this moment
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
force-between-multiple-charges
difficult
asked
Feb 12, 2014
by
yamini.v
1
answer
Which of the following is an example of gaseous solution?
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
basics
composition-of-a-solution
asked
Feb 12, 2014
by
sreemathi.v
1
answer
Value of gas Constant R is
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
ideal-gas-equation
easy
q6
asked
Feb 12, 2014
by
sharmaaparna1
1
answer
What should be the value of refractive index n of a glass rod placed in air, so that the light entering through the flat surface of rod does not cross the curved surface of rod.
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
refraction
difficult
asked
Feb 12, 2014
by
meena.p
1
answer
Figure shows two conducting thin concentric shells of radii r and 3r . The outer shell carries charge q . Inner shell is neutral . Find the charge that will flow from inner shell to outer after the switch S is closed .
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatics-of-conductors
medium
asked
Feb 12, 2014
by
yamini.v
1
answer
For what relation will the circle touch each other $S_1=x^2+y^2+2gx+2fy=0$ and $S_2=x^2+y^2+2g'x+2f'y=0$?
jeemain
math
class11
coordinate-geometry-conic -sections
circle
ch11
q156
difficult
asked
Feb 12, 2014
by
sreemathi.v
1
answer
Calculate the density of $CO_2\; at \;100^{\large\circ}C$ and 800mm Hg pressure.
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
ideal-gas-equation
easy
q5
asked
Feb 12, 2014
by
sharmaaparna1
1
answer
An electric dipole of dipole moment P is placed in a uniform electric field E in stable equilibrium position . It's moment of inertia about the centroidal axis is I . If it is displaced slightly from it mean position find the period of small oscillations .
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-flux-and-dipole
difficult
asked
Feb 12, 2014
by
yamini.v
1
answer
Find the relation so that the two circles $x^2+y^2+2gx+2fy+c=0$ and $x^2+y^2+2g_1x+2f_1+c_1=0$cut each other orthogonally.
jeemain
math
class11
coordinate-geometry-conic -sections
circle
ch11
q155
easy
asked
Feb 12, 2014
by
sreemathi.v
1
answer
What should be the value of angle $\theta$ so that light entering normally through the surface AC of a prism of refractive index $(n= \large\frac{3}{2})$ does not cross the second refracting surface AB.
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
refraction-by-prism
medium
asked
Feb 12, 2014
by
meena.p
1
answer
Find the angle of intersection of two circles?
jeemain
math
class11
coordinate-geometry-conic -sections
circle
ch11
q154
difficult
asked
Feb 12, 2014
by
sreemathi.v
1
answer
Find angle of refraction in a medium $(\mu =2)$ . If light is incident in vacuum making angle equal to twice the critical angle.
jeemain
physics
class12
unit16
ray-optics-and-optical-instruments
refraction
easy
asked
Feb 12, 2014
by
meena.p
1
answer
Page:
« prev
1
...
275
276
277
278
279
280
281
...
393
next »
Home
Ask
Tuition
Questions
Practice
Your payment for
is successful.
Continue
...