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Recent questions tagged q40
Questions
Which of the following metal is extracted on smelting of are in blast furnance ?
jeemain
cbse
chemistry
class12
unit6
general-principals-and-processes-of-isolation-of-metals
q40
medium
asked
Mar 17, 2014
by
meena.p
1
answer
Calculate the bond energy of $Cl-Cl$ bond from the following data: \[\] $CH_4(g) + Cl_2(g) \rightarrow CH_3Cl(g) + HCl(g); \Delta H = -100.3\: kJ$. Also the bond energies of $C-H,\: C-Cl,\: H-Cl$ bonds are 413, 326 and 431 kJ/mol respectively.
jeemain
physics
thermodynamics
cbse
class11
class12
q40
medium
asked
Mar 16, 2014
by
thanvigandhi_1
1
answer
Match the following column-I and column-II
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
vsepr(valence-shell-electron-pair-repulsion)theory
q40
difficult
mock
asked
Mar 11, 2014
by
sreemathi.v
1
answer
Which of the following can be used as plasticizers?
jeemain
aipmt
chemistry
cbse
unit5
class12
organic-chemistry-polymers
q40
medium
asked
Mar 7, 2014
by
thanvigandhi_1
1
answer
The species having pyramidal shape is
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
vsepr(valence-shell-electron-pair-repulsion)theory
q40
medium
asked
Mar 6, 2014
by
sreemathi.v
1
answer
Buckminsterfullerene is :
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
vsepr(valence-shell-electron-pair-repulsion)theory
q40
easy
asked
Mar 5, 2014
by
sreemathi.v
1
answer
A tertiary amine can be separated from a mixture of primary and tertiary amine using
jeemain
chemistry
unit13
class12
organic-chemistry
nitrogen
amines
q40
medium
asked
Mar 3, 2014
by
sreemathi.v
1
answer
If $c$ is the speed of electromagnetic waves in vacuum, their speed in a medium of dielectric constant $K$ and relative permeability $ \mu_r$ is
jeemain
aipmt
physics
cbse
class12
ch8
electromagnetic-waves
q40
medium
asked
Feb 27, 2014
by
thanvigandhi_1
1
answer
Identify the correct order of reactivity in electrophilic substitution action of the following compounds.
jeemain
chemistry
class11
organic-chemistry
q40
difficult
basic-organic-chemistry
ch12
asked
Feb 22, 2014
by
meena.p
1
answer
What is the correct name of the following molecule?
jeemain
chemistry
unit11
unit12
class12
organic-chemistry
oxygen
aldehyde-and-ketones
q40
medium
asked
Feb 20, 2014
by
sreemathi.v
1
answer
A container having 3 mole of gas occupies 60 litre at pressure P and temperature T . If 0.2 mole of gas are introduced at same P and T. Find the change in volume.
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
gas-laws
easy
q40
asked
Feb 15, 2014
by
sharmaaparna1
1
answer
Which one of the following solutions will have the lowest freezing point?
jeemain
chemistry
class12
ch2
solutions
q40
medium
colligative-properties
depression-of-freezing-point
asked
Feb 13, 2014
by
sreemathi.v
1
answer
A straight line drawn perpendicular to the axis and terminated at both end of the curve is a _________________ of the parabola.
jeemain
math
class11
coordinate-geometry-conic-sections
parabola
ch11
q40
easy
asked
Feb 5, 2014
by
sreemathi.v
1
answer
General solution of differential equation: $r \sin \theta\; d\theta +(r^3 -2 r^2 \cos \theta +\cos \theta)dr=0$
jeemain
math
class12
ch9
differential-equations
solving-using-separation-of-variables
q40
difficult
asked
Feb 4, 2014
by
meena.p
1
answer
The coordination number and the oxidation state of the element 'E' in the complex $[E(en)_2(C_2O_4)]NO_2$ when 'en' is ethylenediamine
jeemain
chemistry
class12
coordination-compounds
unit9
q40
medium
asked
Feb 3, 2014
by
sreemathi.v
1
answer
If the two lines of regression are $ 5x+3y=55$ and $ 7x+y=45$ then find the correlation coefficient between $x$ and $y$
jeemain
math
cbse
class11
statistics
analysis-of-frequency-distributions-(correlation-coefficient)
difficult
q40
asked
Jan 31, 2014
by
thanvigandhi_1
1
answer
If in a moderately skewed distribution the value of mode and mean are $ 6 \lambda \: and \: 9 \lambda$ respectively, then value of median is
jeemain
math
cbse
class11
statistics
medium
measures-of-dispersion-(mode)
q40
asked
Jan 28, 2014
by
thanvigandhi_1
1
answer
In an n-p-n transistor only $3 \%$ of the charge carriers are allerved to recombine in the base region. The value of $ \alpha$ is
jeemain
physics
class12
unit19
ch14
q40
medium
transistors
semiconductor-electronics
pn-junction
asked
Jan 28, 2014
by
meena.p
1
answer
Tetra ethyl lead is prepared by using an alloy
jeemain
chemistry
class11
s-block-elements
unit10
q40
medium
asked
Jan 27, 2014
by
sreemathi.v
1
answer
In $H_2O_2$ molecule the $O-O$ bond length is
jeemain
chemistry
class11
hydrogen
unit9
q40
medium
asked
Jan 23, 2014
by
sreemathi.v
1
answer
Which of the following is not a false statement?
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q40
asked
Jan 21, 2014
by
thanvigandhi_1
1
answer
Cracking of rubber is due to
jeemain
chemistry
class11
environmental-chemistry
unit14
q40
medium
asked
Jan 20, 2014
by
sreemathi.v
1
answer
The mean of Poisson's distribution with parameter m is
jeemain
math
cbse
class12
probability
easy
q40
asked
Jan 15, 2014
by
thanvigandhi_1
1
answer
Which will be the most stable among $Cu^{+},Fe^+,Fe^{2+}$ and $Fe^{3+}$
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
quantum-mechanical-model
q40
easy
asked
Jan 10, 2014
by
sreemathi.v
1
answer
For the reaction :$A+2B\rightarrow C$,5 mole of A and 8 mole of B will produce
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q40
easy
asked
Jan 8, 2014
by
sreemathi.v
2
answers
1gm of $Fe_2O_3$ solid of 55.2% purity is dissolved in acid and reduced by heating the solution with Zn dust.The resultant solution is cooled and made up to 100ml,25ml of this solution requires 17ml of 0.0167M solution of an oxidant.Calculate the number of electrons taken up by the oxidant in the above reaction.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q40
difficult
asked
Jan 8, 2014
by
sreemathi.v
1
answer
Find the sum of first 25 terms of the sequence 5,5.5,5.55,5.555-----------
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q40
asked
Jan 2, 2014
by
yamini.v
0
answers
The direction ratio of the line $3x+1=6y-2,\:z=1$ is ?
jeemain
math
class12
ch11
3d-geometry
equations-of-lines
medium
q40
asked
Jan 1, 2014
by
rvidyagovindarajan_1
1
answer
$\lim\limits_{x\to 0}\large\frac{(\cos x)^{1/2}-(\cos x)^{1/3}}{\sin^2x}$ is
jeemain
math
class11
ch13
limits-and-derivatives
limits-of-trigonometric-functions
easy
q40
asked
Dec 23, 2013
by
sreemathi.v
1
answer
In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of :
aipmt
modelpaper
physics
2008
q40
asked
Dec 16, 2013
by
thanvigandhi_1
0
answers
$\int \limits_0^{x^2} t.f(t).dt =\large\frac{2}{5}.$$x^3$ then find $f\bigg(\large\frac{4}{25}\bigg)$
jeemain
math
class12
ch7
integral-calculus
integration-by-subsitution
easy
q40
asked
Dec 14, 2013
by
meena.p
1
answer
For strong electrolytes find $\Lambda_m^{\infty}$ of $CH_3COOH$
jeemain
chemistry
unit8
redox-reactions-and-electrochemistry
q40
easy
asked
Dec 12, 2013
by
sreemathi.v
1
answer
The term scutellum refers to :
jeemain
eamcet
biology
2002
q40
asked
Dec 9, 2013
by
thanvigandhi_1
0
answers
Consider the following reaction of 1-methyl cyclohexene with NBS.Four likely products of the reaction are shown below. One of the likely product is not shown however
jeemain
chemistry
unit21
organic-chemistry
q40
difficult
basic-organic-chemistry
class11
ch12
asked
Dec 5, 2013
by
sreemathi.v
1
answer
In Pyrus malus, the false fruit is formed from
jeemain
eamcet
biology
2001
q40
asked
Dec 1, 2013
by
thanvigandhi_1
1
answer
Select among the following one with largest size
jeemain
chemistry
unit15
p-block-elements
q40
medium
asked
Nov 27, 2013
by
sreemathi.v
1
answer
A true fruit along with false fruit is found in :
jeemain
eamcet
biology
2000
q40
asked
Nov 25, 2013
by
thanvigandhi_1
1
answer
Let the solubilities of AgCl in $H_2O$, 0.01 M $CaCl_2$, 0.01 M NaCl and 0.05 M $AgNO_3$ be $S_1, S_2, S_3 and S_4$ respectively. What is the correct relationship between these quantities?
jeemain
aipmt
chemistry
equilibrium
difficult
q40
biology
asked
Nov 23, 2013
by
mosymeow_1
1
answer
The following is a primary consumer
jeemain
eamcet
biology
1999
q40
asked
Nov 23, 2013
by
thanvigandhi_1
0
answers
Let $A=\begin{bmatrix}0 &0&-1\\0&-1&0\\-1&0&0\end{bmatrix}$.The only correct statement about the matrix A is
jeemain
math
class12
ch4
determinants
q40
adjoint-and-inverse
easy
asked
Nov 21, 2013
by
sreemathi.v
1
answer
For a $\Delta ABC$ it is given that : $\cos A+\cos B+\cos C=\large\frac{3}{2}$.What type of triangle is $ABC$?
jeemain
math
class11
ch3
trigonometric-functions
q40
trigonometric-identities
difficult
asked
Nov 19, 2013
by
sreemathi.v
1
answer
If $\overrightarrow a=\hat i+\hat j+\hat k\:\:\overrightarrow b=4\hat i+3\hat j+4\hat k\:\:and\:\:\overrightarrow c=\hat i+\alpha\hat j+\beta\hat k$ are linear dependent vectors and $|\overrightarrow c|=\sqrt 3$ then $ (\alpha,\beta)=?$
jeemain
math
class12
ch10
vector-algebra
medium
vector-product
q40
asked
Nov 12, 2013
by
rvidyagovindarajan_1
1
answer
From the following, identify DNA fragment showing palindromic sequence :
jeemain
eamcet
biology
2010
q40
asked
Nov 12, 2013
by
thanvigandhi_1
0
answers
A coin and six faced die, both unbiassed, are thrown simultaneously. The probability of getting a head on the coin and an odd number on the die, is :
jeemain
eamcet
math
2005
q40
asked
Nov 12, 2013
by
meena.p
1
answer
Which one of the following pairs of reactants does not form oxygen when they react with each other?
jeemain
eamcet
chemistry
2005
q40
asked
Nov 11, 2013
by
meena.p
0
answers
An n-p-n transistor power amplifier in C-E configuration gives :
jeemain
eamcet
physics
2005
q40
asked
Nov 8, 2013
by
meena.p
1
answer
A number n is chosen at random from $\{1,2,3,4.......,1000\}$. The probability that n is a number that leaves remainder 1 when divided by 7, is :
jeemain
eamcet
math
2006
q40
asked
Nov 6, 2013
by
meena.p
1
answer
The number of sigma and pi $(\pi)$ bonds presents in benzene respectively are :
jeemain
eamcet
chemistry
2006
q40
asked
Nov 5, 2013
by
meena.p
1
answer
Consider a p-n junction as a capacitor, formed with p and n-materials acting as thin metal electron and depletion layer width acting as separation between them. Basing on this , assume that n-p-n transistor is working as an amplifier in CE configuration . If $C_1$ and $C_2$ are the base - emitter and collector- emitter junction capacitances, then:
jeemain
eamcet
physics
2006
q40
asked
Oct 29, 2013
by
meena.p
1
answer
The correct order of plants which exhibits laticiferous cells and lysigenous cavities respectively is :
jeemain
eamcet
biology
2011
q40
asked
Oct 27, 2013
by
thanvigandhi_1
1
answer
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