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JEEMAIN PAST PAPERS
Which occurs in nature in free state
jeemain
chemistry
class12
d-and-f-block-elements
unit8
q55
difficult
asked
Jan 30, 2014
by
sreemathi.v
1
answer
Which of the following statement is not correct.
jeemain
chemistry
class12
d-and-f-block-elements
unit8
q54
difficult
asked
Jan 30, 2014
by
sreemathi.v
1
answer
Three identical charges $\;(q)\;$ are placed at corners of an equilateral triangle of side l . Find the work require to double the dimensions of traingle
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
potential-energy
easy
asked
Jan 30, 2014
by
yamini.v
1
answer
Which one of the following is reduced by hydrogen peroxide in acid medium
jeemain
chemistry
class12
d-and-f-block-elements
unit8
q53
difficult
asked
Jan 30, 2014
by
sreemathi.v
1
answer
Which one of the following is highest melting halide.
jeemain
chemistry
class12
d-and-f-block-elements
unit8
q52
difficult
asked
Jan 30, 2014
by
sreemathi.v
1
answer
Five point charges $\;(q\;each)\;$ are placed at five vertices of a regular hexagon of side 2a . What is the magnitude of net electric field at the centre of hexagon .
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-field
easy
asked
Jan 30, 2014
by
yamini.v
1
answer
The atomic numbers of the f-block elements are:
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
lanthanides
easy
f-block
actinides
asked
Jan 30, 2014
by
sreemathi.v
1
answer
The circuit given below represents
jeemain
physics
class12
unit19
ch14
q70
easy
junction-diodes
semiconductor-electronics
logic-gates
asked
Jan 30, 2014
by
meena.p
1
answer
Match the following:
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
important-compounds
easy
asked
Jan 30, 2014
by
sreemathi.v
1
answer
Charges 2 q and q are placed at $\;(a , 0)\;and\;(-a , 0)\;.$ The points where electric field is zero will lie in
jeemain
physics
class12
unit11
electrostatics
easy
asked
Jan 30, 2014
by
yamini.v
1
answer
Consider the following statement, which of the following choices is correct?
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
easy
electron-configuration
asked
Jan 30, 2014
by
sreemathi.v
1
answer
Match the following catalysts to the transition metal used.
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
general-properties
catalytic-properties
easy
asked
Jan 30, 2014
by
sreemathi.v
1
answer
In the circuit shown below two inputs A and B and output C is given. The circuit represents
jeemain
physics
class12
unit19
ch14
q69
easy
junction-diodes
semiconductor-electronics
logic-gates
asked
Jan 30, 2014
by
meena.p
1
answer
A proton is released from rest , 10 cm from a charged sheet carrying charge density of $\;-2.21\times10^{-9}\;c/m^2\;.$ It will strike the sheet after time $\;(approximately)$
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
continuous-charge-distribution
medium
asked
Jan 30, 2014
by
yamini.v
1
answer
For making good quality mirrors, plates of float glass are used. These are obtained by floating molten glass over a liquid metal which odes not solidify before glass. The metal used can be?
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
applications
easy
asked
Jan 30, 2014
by
sreemathi.v
1
answer
The standard reduction potentials (E$^{\circ}$ ) of the lanthanides for M$^{+3}$ (aq) + 3e$^{-} \overset{\Delta} \rightarrow$ M (s) all fall between –2.52 V (La) and –2.25 V (Lu). This helps explain which of the following properties of Lanthanides?
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
medium
f-block
lanthanides
standard-reduction-potential
asked
Jan 30, 2014
by
sreemathi.v
1
answer
Formation of interstitial compounds makes the transition metal more:
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
easy
interstital-compounds
general-properties
asked
Jan 30, 2014
by
sreemathi.v
1
answer
Two point charges $\;q_{1}=3\times10^{-6}\;C\;$ and $\;q_{2}=5\times10^{-6}\;C\;$ are located at $\;(3 , 5 ,1)\;$ and $\;(1 , 3 , 2)\;m$ . Find the force on $\;q_{1}\;$ due to $\;q_{2}\;.$
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
coulomb-law
easy
asked
Jan 30, 2014
by
yamini.v
1
answer
Match the following, where EAN stands for Effective Atomic Number, the number of electrons on the central metal ion, including ligands in the bonding:
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
medium
general-properties
effective-atomic-number
complex-compounds
asked
Jan 30, 2014
by
sreemathi.v
1
answer
Which of the following statements about magnetic properties is/are incorrect?
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
medium
magnetic-properties
general-properties
asked
Jan 30, 2014
by
sreemathi.v
1
answer
The photo electric emission requires a threshold frequency $V_o$. For a certain metal $\lambda_1$ = 2200 $\overset{\circ}{A}$ and $\lambda_2$ = 1900 $\overset{\circ}{A}$ produce electrons with a maximum kinetic energy $KE_1$ and $KE_2$. If $KE_2 = 2KE_1$. Calculate $V_o$ and corresponding $\lambda_o$.
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
quantum-mechanical-model
difficult
q151
asked
Jan 30, 2014
by
sharmaaparna1
1
answer
If a transition-metal compound absorbs violet radiation of the visible region, its colour would be?
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
easy
general-properties
coloured-and-colourless-ions
asked
Jan 30, 2014
by
sreemathi.v
1
answer
What is the spin only magnetic moment value in Bohr magneton unit for $K_2Co(SCN)_4$?
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
medium
magnetic-properties
general-properties
asked
Jan 30, 2014
by
sreemathi.v
1
answer
Find the force on points of a triangle
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
coulomb-law
easy
asked
Jan 30, 2014
by
yamini.v
1
answer
What is the spin only magnetic moment value in (Bohr Magneton units) of Cr(CO)$_6$?
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
medium
magnetic-properties
general-properties
asked
Jan 30, 2014
by
sreemathi.v
1
answer
Which of the following ions is expected to be colourless - $Ti^{4+}, Cu^{2+}, V^{3+}$ and $Fe^{2+}$?
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
general-properties
coloured-and-colourless-ions
easy
asked
Jan 30, 2014
by
sreemathi.v
1
answer
Consider the situation of figure the work done in moving to particles from P to A is $\;W_{A}\;is\;W_{B}\;$ and $\;P\;to\;C\;W_{C}\;$ Find the correct relation .
jeemain
physics
class12
unit11
electrostatics
easy
asked
Jan 30, 2014
by
yamini.v
1
answer
Calculate the largest wavelength which can remove the electron from 1 Bohr's orbit. Given $E_1$ = 13.6 eV
sat
chemistry
atomic-structure
jeemain
physical-chemistry
class11
unit2
bhor's-model
medium
q151
asked
Jan 30, 2014
by
sharmaaparna1
1
answer
The Atomic numbers of Mn, Fe and Co are 25, 26 and 27 respectively. The order of Magnetic moments among the following is
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
easy
general-properties
magnetic-properties
asked
Jan 30, 2014
by
sreemathi.v
1
answer
The radius of (Atomic number of La = 57) is 1.06 A. Which one of the following given values will be closest to the radius of Lu$^{3+}$? Note: Atomic radius of Lu = 71.
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
easy
general-properties
atomic-and-ionic-radii
asked
Jan 30, 2014
by
sreemathi.v
1
answer
The electronic configuration of chromium in its ground state is
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
electron-configuration
easy
asked
Jan 30, 2014
by
sreemathi.v
1
answer
Math the following Groups with respect to its electron configuration:
jeemain
chemistry
inorganic-chemistry
class12
ch8
d-and-f-block-elements
electron-configuration
easy
asked
Jan 30, 2014
by
sreemathi.v
1
answer
The Output Y of the figure is :
jeemain
physics
class12
unit19
ch14
q68
easy
logic-gates
semiconductor-electronics
asked
Jan 30, 2014
by
meena.p
1
answer
The figure represents
jeemain
physics
class12
unit19
ch14
67
easy
logic-gates
semiconductor-electronics
asked
Jan 30, 2014
by
meena.p
1
answer
The Boolean equation for the circuit is
jeemain
physics
class12
unit19
ch14
q66
easy
logic-gates
semiconductor-electronics
asked
Jan 30, 2014
by
meena.p
1
answer
The variance of $n$ natural number is
jeemain
math
cbse
class11
statistics
variance
medium
q48
asked
Jan 29, 2014
by
thanvigandhi_1
1
answer
If you flip a fair coin 19 times, what is the probability that you will end up with an even number of heads?
jeemain
math
probability
cbse
class11
events
ch13
medium
sec-a
asked
Jan 29, 2014
by
balaji
1
answer
The correlation coefficient of two variables $x$ and $y$ is 0.8. The regression coefficient of $y$ on $x$ is 0.2 then the regression coefficient of $x$ and $y$ is
jeemain
math
cbse
class11
statistics
correlation-coefficient
medium
q47
asked
Jan 29, 2014
by
thanvigandhi_1
1
answer
The correlation coefficient between $x$ and $y$ is from the following data is \[\] $ \Sigma x = 40\: \: \Sigma y=50\: \: \Sigma xy = 220\: \: \Sigma x^2=200\: \: \Sigma y^2 = 262\: \: n=10$
jeemain
math
cbse
class11
statistics
correlation-coefficient
medium
q46
asked
Jan 29, 2014
by
thanvigandhi_1
1
answer
A ring of radius R is having charges $\; q \;and \; 3 q\;$ distributed on its two half parts . The electric potential at a point on the axis $\;\sqrt{3}\;R\;$ from its centre is
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatic-potential
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
The geometric mean of $ 2.262.....2^n$ is
jeemain
math
cbse
class11
statistics
measures-of-dispersion-(g.m)
medium
q45
asked
Jan 29, 2014
by
thanvigandhi_1
1
answer
The sum of absolute deviation about median is
jeemain
math
cbse
class11
statistics
easy
measures-of-dispersion-(median)
q84
asked
Jan 29, 2014
by
thanvigandhi_1
1
answer
The coefficient of correlation $r$ is independent of
jeemain
math
cbse
class11
statistics
easy
coefficient-of-correlation
q83
asked
Jan 29, 2014
by
thanvigandhi_1
1
answer
The variance of 6, 8, 10, 12, 14 is
jeemain
math
cbse
class11
statistics
variance
easy
q82
asked
Jan 29, 2014
by
thanvigandhi_1
1
answer
If $b_{yx}=1.6$ and $b_{xy}=0.4$ and the angle between two regression lines is $ \theta$ then $ \tan \theta$ is
jeemain
math
cbse
class11
statistics
variance-and-standard-deviation
medium
q44
asked
Jan 29, 2014
by
thanvigandhi_1
1
answer
If 25% of item are less than 10 and 25% are more than 40, then coefficient of quartile deviation is
jeemain
math
cbse
class11
statistics
easy
measures-of-dispersion-(q.d)
q81
asked
Jan 29, 2014
by
thanvigandhi_1
1
answer
If the coefficient of variation of a distribution is 45% and the mean is 12 then its standard deviation is
jeemain
math
cbse
class11
statistics
easy
variance-and-standard-deviation
q80
asked
Jan 29, 2014
by
thanvigandhi_1
1
answer
The average marks of boys in a class is 52 and that of girls is 42. The average marks of boys and girls combined is 50. The percentage of boys in the class is
jeemain
math
cbse
class11
statistics
measures-of-dispersion
difficult
q33
asked
Jan 29, 2014
by
thanvigandhi_1
1
answer
A proton , a deutron and alpha particle are accelerated through potentials of $\;V , 2V ,4V\;$respectively . Their velocity will bear a ratio .
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatic-potential-energy
medium
asked
Jan 29, 2014
by
yamini.v
1
answer
The mean of the numbers $ a, b, 8, 5, 10$ is $6$ and the variance is $6.80$. Then which one of the following gives possible values of $a$ and $b$ ?
jeemain
math
cbse
class11
statistics
variance-and-standard-deviation
difficult
q32
asked
Jan 29, 2014
by
thanvigandhi_1
1
answer
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