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Recent questions tagged q41
Questions
Calculate the volume occupied by 96g $CH_4$ at 16 atm and $27^{\large\circ}C$.(R = 0.08litre atm $K^{-1}mol^{-1}$.
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
ideal-gas-equation
easy
q41
asked
Feb 16, 2014
by
sharmaaparna1
1
answer
Find the axis,vertex,focus & equation of directrix for the parabola $y^2=4ax$?
jeemain
math
class11
coordinate-geometry-conic-sections
parabola
ch11
q41
easy
asked
Feb 5, 2014
by
sreemathi.v
1
answer
The differential equation for the family of curves $x^2+y^2-2ay=0$ where a is an arbitary constant is given $y'= \large\frac{dy}{dx}$
jeemain
math
class12
ch9
differential-equations
formation-of-differential-equations
q41
easy
asked
Feb 4, 2014
by
meena.p
1
answer
In which of the following octahedral complexes of CO(at.no=27),will be magnitude of $\Delta_0$ be the highest
jeemain
chemistry
class12
coordination-compounds
unit9
q41
medium
asked
Feb 3, 2014
by
sreemathi.v
1
answer
If two variables $x, y$ are related by $ax+by+c=0$ with $ab < 0$ then correlation coefficient between $x$ and $y$ is given by
jeemain
math
cbse
class11
statistics
analysis-of-frequency-distributions-(correlation-coefficient)
difficult
q41
asked
Jan 31, 2014
by
thanvigandhi_1
1
answer
For 12 pair of observation on $x$ and $y$ the $r$ calculated is $0.674$. The standard error is
jeemain
math
cbse
class11
statistics
medium
variance-and-standard-deviation
q41
asked
Jan 28, 2014
by
thanvigandhi_1
1
answer
In an amplifier, negative feedback is introduced with feedback fraction $\beta =0.01$. If voltage given with out negative feed back. is $2500$ what is voltage gain with negative feed back.
jeemain
physics
class12
unit19
ch14
q41
medium
transistors
semiconductor-electronics
asked
Jan 28, 2014
by
meena.p
1
answer
unpaired electrons $(e^-)$ are present in
jeemain
chemistry
class11
s-block-elements
unit10
q41
medium
asked
Jan 27, 2014
by
sreemathi.v
1
answer
The percentage of deuterium in heavy water
jeemain
chemistry
class11
hydrogen
unit9
q41
medium
asked
Jan 23, 2014
by
sreemathi.v
1
answer
What happens when chlorides are heated with $NH_4Cl$
jeemain
chemistry
class11
environmental-chemistry
unit14
q41
medium
asked
Jan 20, 2014
by
sreemathi.v
1
answer
Under a normal curve mean $ \pm 3\: \sigma $ covers an area equal to
jeemain
math
cbse
class12
probability
easy
q41
asked
Jan 15, 2014
by
thanvigandhi_1
1
answer
Out of first 100 elements,number of elements having electrons in 3d-orbitals are
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
quantum-mechanical-model
q41
easy
asked
Jan 10, 2014
by
sreemathi.v
1
answer
The % loss in weight after heating a pure sample of potassium chlorate (M wt:122.5) will be
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
atomic-and-molecular-masses
q41
easy
asked
Jan 8, 2014
by
sreemathi.v
1
answer
A sample of $MnSO_4.4H_2O$ is heated in air to give $Mn_3O_4$.The residue $Mn_3O_4$ is dissolved in 100ml of $N/10$ $FeSO_4$ containing $H_2SO_4$.The solution reacts completely with 50ml of $KMnO_4$.25ml of this $KMnO_4$ requires 30ml of N/10 $FeSO_4$ for complete oxidation.Determine the amount of $MnSO_4.4H_2O$ is the sample
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q41
difficult
asked
Jan 8, 2014
by
sreemathi.v
1
answer
If $a, b, c$----$l$ is a GP, find the sum of the series.
jeemain
math
class11
ch9
sequences-and-series
easy
geometric-progression
q41
asked
Jan 3, 2014
by
yamini.v
1
answer
The equation of the plane that meets the coordinated axis at the points $A,B,C$ respectively so that the centroid of the $\Delta ABC$ is $(\alpha,\beta,\gamma)$ is ?
jeemain
math
class12
ch11
3d-geometry
intersection-of-lines-and-planes
medium
q41
asked
Jan 1, 2014
by
rvidyagovindarajan_1
1
answer
$\lim\limits_{x\to 0}\big(\large\frac{a^x+b^x+c^x}{3}\big)^{\Large\frac{1}{x}}$ is
jeemain
math
class11
ch13
limits-and-derivatives
introduction of limits
easy
q41
asked
Dec 23, 2013
by
sreemathi.v
1
answer
The work function of a surface of a photosensitive material is 6.2 e.V. The wavelength of the incident radiation for which the stopping potential is 5 V lies in the :
aipmt
modelpaper
physics
2008
q41
asked
Dec 16, 2013
by
thanvigandhi_1
0
answers
$f(x^2) =x^3 (2+x^2),$$ f(x^2)= \int \limits_0^{x^3} f(t) dt,$ find $f(8)=?$
jeemain
math
class12
ch7
integral-calculus
definite-integrals-by-substitution
medium
q41
asked
Dec 16, 2013
by
meena.p
1
answer
$NaOH$(aq base) was added to an aqueous HCl solution gradually and the conductivity of solution was measured.The plot of conductivity vs volume of NaOH added
jeemain
chemistry
unit8
redox-reactions-and-electrochemistry
q41
difficult
asked
Dec 12, 2013
by
sreemathi.v
1
answer
In which plant, two curved hooks are formed on the seed ?
jeemain
eamcet
biology
2002
q41
asked
Dec 9, 2013
by
thanvigandhi_1
0
answers
Seeds with spongy aril containing air spaces are found in
jeemain
eamcet
biology
2001
q41
asked
Dec 2, 2013
by
thanvigandhi_1
0
answers
The no of $\pi$ bonds in the product formed by passing acetylene through dil $H_2SO_4$ containing mercuric sulphate
jeemain
chemistry
unit15
p-block-elements
q41
medium
asked
Nov 27, 2013
by
sreemathi.v
1
answer
The remnant of nucellus in seed is :
jeemain
eamcet
biology
2000
q41
asked
Nov 26, 2013
by
thanvigandhi_1
0
answers
$NH_4OH$ is a weak base but it becomes still weaker in the aqueous solution of
sat
chemistry
chemical-equilibrium
jeemain
aipmt
equilibrium
easy
q41
biology
asked
Nov 23, 2013
by
mosymeow_1
1
answer
The morphogenetic property of cytokinin was experimentally proved first by
jeemain
eamcet
biology
1999
q41
asked
Nov 23, 2013
by
thanvigandhi_1
0
answers
Let $A=\begin{bmatrix}1 &-1&1\\2&1&-3\\1&1&1\end{bmatrix}$ and $10B=\begin{bmatrix}4 &2&2\\-5&0&\alpha\\1&-2&3\end{bmatrix}$ if $B$ is the inverse of matrix A then $\alpha$ is
jeemain
math
class12
ch4
determinants
q41
adjoint-and-inverse
easy
asked
Nov 21, 2013
by
sreemathi.v
1
answer
If $a,b,c$ are lengths of sides of a $\Delta\:ABC$ and for any non collinear vectors $\overrightarrow u\:\:and\:\:\overrightarrow v$ if $(a-b)\overrightarrow u+(b-c)\overrightarrow v+(c-a)(\overrightarrow u\times\overrightarrow v)=0$, then the $\Delta$ is ?
jeemain
math
class12
ch10
vector-algebra
medium
vector-product
q41
asked
Nov 13, 2013
by
rvidyagovindarajan_1
1
answer
Statement (S) : Populations of a species inhabiting different geographical areas are in a continuous process of adaptation to their surrounding environments and this leads to the evolution of a new species. Reasons (R) : Geographical barriers obstruct interbreeding of populations of a species leading to reproductive isolation and evolution of new species.
jeemain
eamcet
biology
2010
q41
asked
Nov 12, 2013
by
thanvigandhi_1
0
answers
A number n is chosen at random from $S=\{1,2,3,.....,50\}$.Let $A= \bigg \{ n \in S:n +\large\frac{50}{n} $$ > 27 \bigg\}$$,B= (n \in S:n$ is a Prime) and $C=\{n \in S:n \;is\; a\; square \}$. Then correct order of their probabilities is :
jeemain
eamcet
math
2005
q41
asked
Nov 12, 2013
by
meena.p
1
answer
In the random experiment of tossing two unbiased dice let E be the event of getting the sum B and F be the event of getting even numbers on both the dice. Then : $I.P(E)=\large\frac{7}{36}$$ ; \quad II.P(F)=\large\frac{1}{3}$ Which of the following is a correct statement ?
jeemain
eamcet
math
2006
q41
asked
Nov 6, 2013
by
meena.p
1
answer
Which of the following statements are true about protostomes?
jeemain
eamcet
biology
2011
q41
asked
Oct 27, 2013
by
thanvigandhi_1
1
answer
If A and B are mutually exclusive events with $P(B) \neq 1,$ then $P(A | \bar {B})$ is equal to (Here $\bar B$ is the complement of the event B)
jeemain
eamcet
math
2007
q41
asked
Oct 25, 2013
by
meena.p
1
answer
In nature,abundance of $^1H_1$ and $^2H_1$ are 99.985 and 0.015 percent respectively and water obtained from it contains $H_2O$ and $D_2O$.The number of $D_2O$ molecules in 400mL water (if density is assumed to be 1.0g/mL) will be :
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q41
medium
asked
Oct 25, 2013
by
sreemathi.v
1
answer
Let S be the sample space of the random experiment of throwing simultaneously two unbiased dice with six faces ( numbered 1 to 6) and let $E_k=\{(a,b) \in S : ab =k\}\;for\; k \leq 1$ . If $p_k=P(F_k)\; for\; k \leq 1$ then the correct, among the following , is
jeemain
eamcet
math
2008
q41
asked
Oct 17, 2013
by
meena.p
1
answer
Identify the Facultative parasite from the below given
jeemain
eamcet
biology
2012
q41
asked
Oct 16, 2013
by
thanvigandhi_1
1
answer
If $\large\frac{\sin^4\theta}{2}+\frac{\cos^4\theta}{2}=\frac{1}{5}$ then
jeemain
math
class11
ch3
trigonometric-functions
q41
trignometric-equations
medium
asked
Oct 16, 2013
by
sreemathi.v
1
answer
If $X$ is a binomial variate with the range $\{0,1,2,3,4,5,6\}$ and $P(X=2)=4P(X=4),$ then the parameter p of X is :
jeemain
eamcet
math
2009
q41
asked
Oct 9, 2013
by
meena.p
1
answer
The value of $\cos 12^{\large\circ}+\cos 84^{\large\circ}+\cos 156^{\circ}+\cos 132^{\large\circ}$ is
jeemain
math
class11
ch3
trigonometric-functions
q41
angles
easy
asked
Oct 8, 2013
by
sreemathi.v
1
answer
A object of mass $5.0\;g$ is projected into air using a rubber string of cross sectional area of $1;mm^2$. The length of the chord when it was unstretched is 10.0 cm. It is then stretched to 12 cm to project the object . The young's modulus of rubber is $5.0 \times 10^8 n/m^2$. The velocity of projectile is (assuming all the energy of string is transferred to projectile)
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q41
difficult
asked
Oct 7, 2013
by
meena.p
1
answer
In amoeboid movement, according to Goldacre and Lorsch cytoplasm solates due to
jeemain
eamcet
biology
2013
q41
asked
Oct 5, 2013
by
thanvigandhi_1
1
answer
If the mean and variance of a binomial variable X are 2 and 1 respectively, the $P(X \geq 1)=$
jeemain
eamcet
math
2010
q41
asked
Sep 27, 2013
by
meena.p
1
answer
$\cos A =\large\frac{3}{4}$$=>32 \sin \bigg(\large\frac{A}{2}\bigg)$$ \sin \bigg(\large\frac{5A}{2}\bigg)=$
jeemain
eamcet
math
2011
q41
asked
Sep 20, 2013
by
meena.p
1
answer
If $X$ is a Poisson variate and $P(X=1)=2P(X=2)$ then $P(X=3)=$
jeemain
eamcet
math
2013
q41
asked
Sep 16, 2013
by
meena.p
1
answer
The reaction between .............. Baeyer reagent gives ethylene glycol.
jeemain
eamcet
1991
fitb
q41
asked
Sep 12, 2013
by
meena.p
0
answers
Infinite numbers of masses, each of mass m,are placed along straight line at distances of r,2r,4r,8r etc from a reference point O.Find the gravitational field at point O
jeemain
physics
class11
unit6
gravitation
q41
medium
asked
Aug 21, 2013
by
meena.p
1
answer
A bucket of water weighing 20 kg is slowly raised from depth of 20 m to ground level by a roap. The mass of rope is 1.2 kg per meter. Find the work done
jeemain
physics
class11
unit4
work-power-energy
q41
medium
asked
Jul 22, 2013
by
meena.p
1
answer
A block of mass m is in contact with the cart C as shown. The coefficient of static friction between the block and cart is $\mu$. The acceleration $\alpha$ of the cart that will prevent the block from falling satisfies
jeemain
physics
class11
unit3
laws-of-motion
q41
medium
asked
Jul 9, 2013
by
meena.p
1
answer
Curie is a unit of
jeemain
physics
class11
ch2
units-and-measurement
q41
easy
international-system-of-units
asked
Jun 18, 2013
by
meena.p
1
answer
The curve $y=e^{-x} $ is
tnstate
class12
bookproblem
p233
objective
q41
asked
May 20, 2013
by
poojasapani_1
1
answer
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