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Recent questions tagged q40
Questions
Four numbers are chosen at random from {1,2,3............,40}. The probability that they are not consecutive, is
jeemain
eamcet
math
2007
q40
asked
Oct 25, 2013
by
meena.p
1
answer
Haemoglobin $(C_{2952}H_{9664}N_{812}O_{832}S_8Fe_4)$ is oxygen carrier. If a person has $5L$ blood and each mL of blood has $5\times 10^9$ R.B.C and each R.B.C has $2.8\times 10^8$ haemoglobin molecules, then how many grams of haemoglobin is present in the body of that person?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
atomic-and-molecular-masses
q40
medium
asked
Oct 25, 2013
by
sreemathi.v
1
answer
The equilibrium constant for the reaction $SO_2 (g)+\large\frac{1}{2}$$ O_2 (g) \rightleftharpoons SO_3(g)$ is $5 \times 10 ^{-2}\;atm$ The equilibrium consant of the reaction $250_3(g) \rightleftharpoons 2SO_2(g) +O_2 (g) $ would be
jeemain
eamcet
chemistry
2007
q40
asked
Oct 24, 2013
by
meena.p
1
answer
In an n-type semiconductor, the fermi energy level lies
jeemain
eamcet
physics
2007
q40
asked
Oct 23, 2013
by
meena.p
1
answer
If A and B are independent events of a random experiment such that $P(A \cap B)=\large\frac{1}{6}$ and $P(\bar A \cap \bar B)=\large\frac{1}{3},$ then $P(A)= $ (Here $\bar E$ is the complement of the event E)
jeemain
eamcet
math
2008
q40
asked
Oct 17, 2013
by
meena.p
1
answer
Study the following lists
jeemain
eamcet
biology
2012
q40
asked
Oct 16, 2013
by
thanvigandhi_1
1
answer
If $\tan\theta+\tan\big(\theta+\large\frac{\pi}{3}\big)$$+\tan\big(\theta+\large\frac{2\pi}{3}\big)$$=3$ then which of the following is equal to 1.
jeemain
math
class11
ch3
trigonometric-functions
q40
trignometric-identities
medium
asked
Oct 16, 2013
by
sreemathi.v
1
answer
If $m$ and $\sigma^2$ are the mean and variance of the random variable X, whose distribution is given by: X=x: 0 1 2 3 P(X=x): 1/3 1/2 0 1/6 then:
jeemain
eamcet
math
2009
q40
asked
Oct 9, 2013
by
meena.p
1
answer
$\sin 47^{\circ}+\sin 61^{\circ}-\sin 11^{\circ}-\sin 25^{\circ}$ is equal to
jeemain
math
class11
ch3
trigonometric-functions
q40
angles
easy
asked
Oct 8, 2013
by
sreemathi.v
1
answer
A highly rigid cubical block A of small mass M and side L is fixed rigidly to another cubical block B of the same dimensions and modulus of rigidity $\eta$ Such that the lower face of A completely covers the upper face of B. The lower face of B is rigidly held on horizontal surface. A small force is applied perpendicular to one of the side face of A. After the force is withdrawn block A executes small oscillations the time period of which is given by
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q40
medium
asked
Oct 7, 2013
by
meena.p
1
answer
In $F_2$ generation, 960 garden pea pods are produced during dihybrid cross due to self pollination of heterozygous parents. How many pods would be green and inflated?
jeemain
eamcet
biology
2013
q40
asked
Oct 4, 2013
by
thanvigandhi_1
1
answer
Suppose that a random variable X follows Poisson distribution. If $P(X=1)=P(X=2)$ then $P(X=5)=$
jeemain
eamcet
math
2010
q40
asked
Sep 27, 2013
by
meena.p
1
answer
If $f:IR \to IR$ is defined by $f(x)=7+ \cos (5x+3)$ for $ x \in IR,$ then the period of f is :
jeemain
eamcet
math
2011
q40
asked
Sep 20, 2013
by
meena.p
1
answer
The random variable takes the value $1,2,3,..........,m$. If $P(X=n)=\large\frac{1}{m}$ to each n, then the variance of $X$ is
jeemain
eamcet
math
2013
q40
asked
Sep 16, 2013
by
meena.p
1
answer
Water has a higher boiling point than corresponding hydrides $H_2S,H_2Se$ and $H_2Te$. This is because of ............. in water.
jeemain
eamcet
chemistry
1991
fitb
q40
asked
Sep 12, 2013
by
meena.p
0
answers
Three uniform spheres of mass M and radius R each are kept in such a way that each touches the other two. The magnitude of the gravitational force on any of the sphere due to the other two sphere is
jeemain
physics
class11
unit6
gravitation
q40
medium
asked
Aug 21, 2013
by
meena.p
1
answer
An engine of weight 6.5 metric ton is going up an incline of $\large\frac{5}{13}$ at the rate of $9\; km/hr$ .The power of engine , if co-efficient of friction is $\large\frac{1}{12}$ is
jeemain
physics
class11
unit4
work-power-energy
q40
medium
asked
Jul 22, 2013
by
meena.p
1
answer
A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and wall is $\mu$ The weight of the block is
jeemain
physics
class11
unit3
laws-of-motion
q40
easy
asked
Jul 9, 2013
by
meena.p
1
answer
In an experiment the angles are measured using an instrument where $29$ divisions of main scale exactly coincide with $30$ division of vernier scale.If the smallest division in main scale is half a degree, then the least count of the instrument is
jeemain
physics
class11
ch2
units-and-measurement
q40
medium
accuracy-precision-and-errors-in-measurement
asked
Jun 18, 2013
by
meena.p
1
answer
If $f(x)=x^{2}-4x+5$ on $[0 ,3 ]$ then the absolute maximum value is
tnstate
class12
bookproblem
p233
objective
q40
asked
May 18, 2013
by
poojasapani_1
1
answer
If $\overrightarrow{a},\overrightarrow{b},\overrightarrow{c} $ are a right handed triad of mutually perpendicular vectors of magnitude $ a, b , c $ than value of $[\overrightarrow{a} \overrightarrow{b} \overrightarrow{c}]$ is
tnstate
class12
bookproblem
p268
objective
q40
modelpaper
jun-2008
asked
May 10, 2013
by
poojasapani_1
1
answer
6 coins are tossed simultaneously. Find the probability of getting 1) no heads 2) 3 heads
cbse
class12
additionalproblem
kvquestionbank2012
ch13
q40
p43
math
asked
Feb 5, 2013
by
meena.p
0
answers
Evaluate: \[\int \frac{1}{e^x-1}dx\]
cbse
class12
additionalproblem
kvquestionbank2012
ch7
q40
p26
math
asked
Feb 2, 2013
by
meena.p
0
answers
Show that the right circular cone of least curved surface area and given volume is $\sqrt 2 $ times the radius of the base.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q40
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
If $ y=f \bigg(\Large\frac{2x-1}{x^2+1}\bigg)\;\normalsize and\;f' (x)=\sin x^2,\;find\; \Large\frac{dy}{dx}$
cbse
class12
additionalproblem
kvquestionbank2012
ch5
q40
p14
difficult
math
sec-b
asked
Jan 28, 2013
by
meena.p
1
answer
Find the quadratic function defined by the equation $ f(x)=ax^2+bx+c\;if\;f(0)=6,f(2)=11,f(-3)=6,$ using determinants.
cbse
class12
additionalproblem
kvquestionbank2012
ch3
q40
p9
math
sec-b
asked
Jan 24, 2013
by
meena.p
0
answers
Integrating factor of the differential equation $\cos x\large\frac{dy}{dx}$$+y\sin x=1$ is:\[(A)\;\cos x\quad(B)\;\tan x\quad(C)\;\sec x\quad(D)\;\sin x\]
cbse
class12
ch9
sec-a
q40
p196
objective
exemplar
medium
math
asked
Jan 18, 2013
by
sreemathi.v
1
answer
If $\overrightarrow a$ is any non-zero vector ,then $(\overrightarrow a.\hat i)\hat i\;+(\overrightarrow a.\hat j)\hat j\;+(\overrightarrow a.\hat k)\hat k$ equals__________.
cbse
class12
ch10
q40
p219
exemplar
easy
sec-a
math
asked
Jan 17, 2013
by
sreemathi.v
1
answer
Evaluate the following:$\int\sin^{-1}\sqrt{\large\frac{x}{a+x}}dx\quad(Hint:Put\;x=a\tan^2\theta)$
cbse
class12
ch7
q40
p166
exemplar
sec-c
medium
math
asked
Jan 14, 2013
by
sreemathi.v
1
answer
If $y=x^4-10$ and if x changes from $2$ to $1.99$,what is the change in y
cbse
class12
ch6
q40
p139
objective
exemplar
easy
sec-a
math
asked
Jan 11, 2013
by
sreemathi.v
1
answer
An urn contains m white and n black balls,A ball is drawn at random and is put back into the urn along with k additional balls of the same color as that of the ball drawn,A ball is again drawn at random.Show that the probability of drawing a white ball now does not depend on k.
cbse
class12
ch13
q40
p276
short-answer
exemplar
sec-a
easy
math
asked
Jan 9, 2013
by
sreemathi.v
1
answer
A corner point of a feasible region is a point in the region which is the _________ of two boundary lines.
cbse
class12
ch12
q40
p257
fitb
exemplar
sec-a
easy
math
asked
Jan 8, 2013
by
sreemathi.v
1
answer
The vector equation of the line through the points $(3,4,-7)$ and $(1,-1,6)$ is ______________.
cbse
class12
ch11
q40
p239
fitb
exemplar
easy
sec-a
math
asked
Jan 6, 2013
by
sreemathi.v
1
answer
Differentiate the following w.r.t x: $\tan^{-1}\bigg(\large {\frac {a \cos x - b \sin x}{b \cos x + a \sin x}}\bigg)$, where $\frac{-\pi}{2} < x < \frac{\pi}{2}$ and $\frac{a}{b} \tan x > -1$
cbse
class12
ch5
q40
p110
short-answer
exemplar
sec-a
medium
math
asked
Dec 31, 2012
by
sreemathi.v
1
answer
If $x,y, z\in R,$ then the value of determinant $\small\begin{vmatrix}(2^x + 2^{-x})^2 & (2^x - 2^{-x})^2 & 1\\ (3^x + 3^{-x})^2 & (3^x - 3^{-x})^2 & 1\\(4^x + 4^{-x})^2 & (4^x - 4^{-x})^2 & 1\end{vmatrix}$ is
cbse
class12
ch4
sec-a
q40
p83
fitb
exemplar
difficult
math
asked
Dec 27, 2012
by
sreemathi.v
1
answer
If $A=\begin{bmatrix}3 & -5\\-4 & 2\end{bmatrix},$ then find $A^2-5A-14I.$Hence,obtain $A^3$.
cbse
class12
ch3
q40
p58
short-answer
exemplar
easy
sec-c
math
asked
Dec 23, 2012
by
sreemathi.v
1
answer
If $\cos(\tan^{-1}x+\cot^{-1}\sqrt 3)=0,$then the value of $x$ is _______________.
cbse
class12
ch2
q40
p40
fitb
exemplar
easy
sec-a
math
asked
Dec 21, 2012
by
sreemathi.v
1
answer
Let f:$R\rightarrow R$ be the functions defined by $f(x)=x^3+5.$ Then $f^{-1}(x)$ is
cbse
class12
ch1
q40
p15
objective
exemplar
math
sec-a
asked
Dec 19, 2012
by
sreemathi.v
1
answer
Evaluate $ \large \int\limits_0^1e^{2-3x}\;$$dx\;$ as a limit of a sum
cbse
class12
bookproblem
ch7
misc
q40
p353
sec-c
difficult
math
asked
Dec 2, 2012
by
sreemathi.v
1
answer
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