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Recent questions tagged q24
Questions
If a system absorbs reversibly 600 J of heat and performs 250 J of work, the increase in internal energy of the system is
jeemain
physics
thermodynamics
cbse
class11
class12
q24
easy
asked
Mar 15, 2014
by
thanvigandhi_1
1
answer
Which statement best describes the structure of $PF_3Cl_2$
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
vsepr(valence-shell-electron-pair-repulsion)theory
q24
difficult
asked
Mar 10, 2014
by
sreemathi.v
1
answer
Polymer which is used for the formation of baby toys is
jeemain
aipmt
chemistry
cbse
unit5
class12
organic-chemistry
polymers
q24
easy
asked
Mar 6, 2014
by
thanvigandhi_1
1
answer
$CO_2$ is isostructural with
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
vsepr(valence-shell-electron-pair-repulsion)theory
q24
easy
asked
Mar 5, 2014
by
sreemathi.v
1
answer
Show that the ratio of the first $n$ terms of a G.P. to the sum of the terms from $(n+1)^{th}$ to $(2n)^{th}$ term is $1:r^n$
cbse
class11
ch9
bookproblem
exercise9-3
sec-b
medium
q24
math
sequences-and-series
asked
Mar 2, 2014
by
rvidyagovindarajan_1
1
answer
Compound A has a molecular formula $C_7H_7NO$ on treatment with $Br_2/KOH$.A gives an amine B which respond to carbylamine test.B on diazotisation and coupling with phenol gives an azo dye.A can be
jeemain
chemistry
unit13
class12
organic-chemistry
nitrogen
amines
q24
medium
asked
Feb 28, 2014
by
sreemathi.v
1
answer
Electromagnetic waves are transverse in nature is evident by
jeemain
aipmt
physics
cbse
class12
ch8
electromagnetic-waves
q24
easy
asked
Feb 27, 2014
by
thanvigandhi_1
2
answers
The IUPAC name of the following compound
jeemain
chemistry
class11
organic-chemistry
q24
medium
basic-organic-chemistry
ch12
asked
Feb 21, 2014
by
meena.p
1
answer
Which is a product F of reaction
jeemain
chemistry
unit11
unit12
class12
organic-chemistry
oxygen
aldehyde-and-ketones
q24
easy
asked
Feb 19, 2014
by
sreemathi.v
1
answer
The ratio of the rate of diffusion of helium and methane under identical conditions of pressure and temperature is
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
liquifaction-of-gases
easy
q24
asked
Feb 14, 2014
by
sharmaaparna1
1
answer
Find a point such that it divides the line joining the points A(1,1) & B(3,3) in 2 : 3 ratio?
jeemain
math
class11
coordinate-geometry
straight-lines
distance-of-a-point-from-a-line
ch10
q24
medium
asked
Feb 4, 2014
by
sreemathi.v
1
answer
Different equation of all parabola with x axis as the axis and $(a,0)$ as the focus
jeemain
math
class12
ch9
differential-equations
solving-using-separation-of-variables
q24
difficult
asked
Feb 3, 2014
by
meena.p
1
answer
The following complex representation violates IUPAC rule
jeemain
chemistry
class12
coordination-compounds
unit9
q24
easy
asked
Jan 31, 2014
by
sreemathi.v
1
answer
What is current and voltage across the diode in The given circuit given drift current is $ 2 \times 10^{-3}A$
jeemain
physics
class12
unit19
ch14
q24
sec-a
medium
junction-diodes
semiconductor-electronics
asked
Jan 27, 2014
by
meena.p
1
answer
Lime water contains
jeemain
chemistry
class11
s-block-elements
unit10
q24
easy
asked
Jan 27, 2014
by
sreemathi.v
1
answer
$(p \wedge\: ^{\sim}q) \wedge (^{\sim}p V q)$ is
jeemain
math
mathematical-reasoning
class11
ch14
difficult
implications-(tautology-contradiction.)
q24
asked
Jan 23, 2014
by
thanvigandhi_1
1
answer
Exhausted permit does not contain __________ ion.
jeemain
chemistry
class11
hydrogen
unit9
q24
easy
asked
Jan 23, 2014
by
sreemathi.v
1
answer
Identify the contrapositive of the statement, If 2 lines are intersecting then they are not parallel.
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q24
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
The most abundant hydrogen pollutant is
jeemain
chemistry
class11
environmental-chemistry
unit14
q24
easy
asked
Jan 20, 2014
by
sreemathi.v
1
answer
What is the contrapositive of the statement: If it rains, then I stay at home.
jeemain
math
mathematical-reasoning
class11
ch14
easy
statements
q24
asked
Jan 17, 2014
by
thanvigandhi_1
1
answer
Twelve tickets are numbered from 1 to 12. One tickets is drawn at random, then the probability of the number to be divisible by 2 or 3 is
jeemain
math
cbse
class12
probability
events
difficult
q24
asked
Jan 16, 2014
by
thanvigandhi_1
1
answer
A bag contains 3 black, 3 white and 2 red balls. One by one three balls are drawn without replacement. The probability that the third ball is red is equal to
jeemain
math
cbse
class12
probability
medium
q24
asked
Jan 16, 2014
by
thanvigandhi_1
1
answer
Assuming the velocity to be same,which sub-atomic particle possesses smallest de-Brogile wavelength
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
bhor's-model
q24
easy
asked
Jan 10, 2014
by
sreemathi.v
1
answer
A drop (0.05ml) of 12M HCl is spread over a thin sheet of aluminum foil (thickness 0.10mm and density of Al=2.70g/ml).Assuming whole of the HCl is used to dissolve Al,what will be the maximum area of hole produced in foil?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
laws-of-chemical-combinations
q24
difficult
asked
Jan 7, 2014
by
sreemathi.v
1
answer
Two dice are thrown, the probability that the sum of the points on the dice is 7 is
jeemain
math
cbse
class11
probability
random-experiements
easy
q24
asked
Jan 6, 2014
by
thanvigandhi_1
1
answer
If the $4^{th}$ term of a GP is the square of its second term and the first term is -2. Find the $7^{th}$ term of the GP.
jeemain
math
class11
ch9
sequences-and-series
easy
geometric-progression
q24
asked
Jan 2, 2014
by
yamini.v
1
answer
The two lines whose equations are given by $x=ay+b,\:\:z=cy+d\:\:\:and\:\:\:x=a'y+b',\:\:z=c'y+d'$ are $\perp$ if
jeemain
math
class12
ch11
3d-geometry
equations-of-lines
difficult
q24
asked
Dec 28, 2013
by
rvidyagovindarajan_1
1
answer
The value of $\lim\limits_{x\to 0}\large\frac{\int\limits_0^{x^2} \sec^2tdt}{x\sin x}$ is
jeemain
math
class12
unit8
continuity-and-differentiability
easy
q24
asked
Dec 23, 2013
by
sreemathi.v
1
answer
A boy is trying to start a fire by focusing sunlight on a piece of paper using an equiconvex lens of focal length 10 cm. The diameter of the sun is $ 1.39 \times 10^9m$ and its mean distance from the earth is $ 1.5 \times 10^{11}m$. What is the diameter of the sun's image on the paper ?
aipmt
modelpaper
physics
2008
q24
asked
Dec 15, 2013
by
thanvigandhi_1
0
answers
Integrate : $\int \limits_0^{\large\frac{\pi}{4}} $$\log |1+ \tan x| dx$
jeemain
math
class12
ch7
integral-calculus
integration-using-partial-fractions
easy
q24
asked
Dec 13, 2013
by
meena.p
1
answer
$Cu/CuSO_4\parallel AgNO_3/Ag$, Find $K_{eq}$ for the reaction. Given : $E^o_{Cu^{+2}/Cu}=0.34, E^o_{Ag^+/Ag}=0.8, T=298K$
jeemain
chemistry
unit8
redox-reactions-and-electrochemistry
q24
medium
asked
Dec 11, 2013
by
sreemathi.v
1
answer
The correct order of bond angles of $CH_4, NH_3$ and $H_2O$ are
jeemain
chemistry
unit4
chemical-bonding-and-molecular-structure
vsepr(valence-shell-electron-pair-repulsion)theory
q24
medium
asked
Dec 9, 2013
by
sreemathi.v
1
answer
Sleeping movements in Samanea saman leaves are regulated by
jeemain
eamcet
biology
2002
q24
asked
Dec 8, 2013
by
thanvigandhi_1
1
answer
Refer to the below reaction :
jeemain
chemistry
unit21
organic-chemistry
q24
difficult
basic-organic-chemistry
class11
ch12
asked
Dec 5, 2013
by
sreemathi.v
1
answer
Which of the following alkanes will give single product with a methylene insertion?
jeemain
chemistry
unit21
organic-chemistry
q24
medium
basic-organic-chemistry
class11
ch12
asked
Dec 3, 2013
by
sreemathi.v
1
answer
The organism which lives as an endosymbiont in Barley is
jeemain
eamcet
biology
2001
q24
asked
Dec 1, 2013
by
thanvigandhi_1
1
answer
$CO+Cl_2\overset{sun\;light}{\rightarrow}$$x$. $x$ is
jeemain
chemistry
unit15
p-block-elements
q24
easy
asked
Nov 27, 2013
by
sreemathi.v
1
answer
If a point $(x,y)$ moves on a curve and satisfies the equation $\small\begin{vmatrix}a&b&ax+by\\b&c&bx+cy\\ax+by&bx+ay&0\end{vmatrix}=0$ then
jeemain
math
class12
ch3
matrices
q24
elementary-operation-(transformation)-of-a-matrix
difficult
asked
Nov 26, 2013
by
sreemathi.v
1
answer
The terminal acceptor of electrons in non- cyclic photophosphorilation is :
jeemain
eamcet
biology
2000
q24
asked
Nov 24, 2013
by
thanvigandhi_1
0
answers
The general method of proporgation for cultivated varities of Musa is through
jeemain
eamcet
biology
1999
q24
asked
Nov 22, 2013
by
thanvigandhi_1
0
answers
If $x,y,z$ are different from zero and $\Delta =\begin{vmatrix}a&b-y&c-z\\a-x&b&c-z\\a-x&b-y&c\end{vmatrix}=0$ then the value of the expression $\large\frac{a}{x}+\frac{b}{y}+\frac{c}{z}$ is
jeemain
math
class12
ch4
determinants
q24
system-of-linear-equations
medium
asked
Nov 22, 2013
by
sreemathi.v
1
answer
Let $\omega=-\large\frac{1}{2}$$+i\large\frac{\sqrt 3}{2}$.Then the value of the determinant $\begin{vmatrix}1&1&1\\1&-1-\omega^2&\omega^2\\1&\omega^2&\omega^4\end{vmatrix}$ is
jeemain
math
ch4
class12
determinants
q24
evaluate-determinants
easy
asked
Nov 20, 2013
by
sreemathi.v
1
answer
The refracting angle of a prism is A and the refractive index of the material of the prism is $\cot (A/2)$. The angle of minimum deviation of the prism is :
jeemain
eamcet
physics
2004
q24
asked
Nov 20, 2013
by
meena.p
1
answer
$A + B \rightleftharpoons C + D$ One mole each of A and B and 3 moles each of C and D are placed in 1L flask, if equilibrium constant is 2.25. Equilibrium concentrations of A and C will be in the ratio:
jeemain
aipmt
chemistry
equilibrium
difficult
q24
biology
asked
Nov 15, 2013
by
mosymeow_1
1
answer
The extreme values of $4 \cos (x^2) \cos \bigg( \large\frac{\pi}{3}$$+x^2\bigg) - \cos \bigg(\large\frac{\pi}{3}$$-x^2\bigg)$ over R, are :
jeemain
eamcet
math
2005
q24
asked
Nov 12, 2013
by
meena.p
1
answer
False statement related to Cycas is :
jeemain
eamcet
biology
2010
q24
asked
Nov 11, 2013
by
thanvigandhi_1
0
answers
Assertion (A) : The pH of a buffer solution containing equal moles of acetic acid and sodium acetate is 4.8 ($pK_a$ of acetic acid is 4.8). Reason (R) : The ionic product of water at $25^{\circ}C$ is $10^{-14}\;mol^{2}.L^{-2}.$
jeemain
eamcet
chemistry
2005
q24
asked
Nov 11, 2013
by
meena.p
0
answers
The focal length of an equi-convex lens is greater than the radius of curvature of any of the surfaces. Then the refractive index of the material of the lens is :
jeemain
eamcet
physics
2005
q24
asked
Nov 7, 2013
by
meena.p
1
answer
In a rt. angled $\Delta$ $ABC$, the hypotenuse $|\overrightarrow {AB}|=p$,then $\overrightarrow {AB}.\overrightarrow {AC}+\overrightarrow {BC}.\overrightarrow {BA}+\overrightarrow {CA}.\overrightarrow {CB}=?$
jeemain
math
class12
ch10
vector-algebra
medium
vector-product
addition-of-vectors
q24
asked
Nov 6, 2013
by
rvidyagovindarajan_1
1
answer
$cosec 15^{\circ}+ \sec 15^{\circ}$ is equal to :
jeemain
eamcet
math
2006
q24
asked
Nov 5, 2013
by
meena.p
1
answer
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