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Recent questions tagged q17
Questions
Arrange the following alkenes in the increasing order of their heat of hydrogenation
jeemain
chemistry
unit21
organic-chemistry
q17
medium
basic-organic-chemistry
class11
ch12
asked
Dec 3, 2013
by
sreemathi.v
1
answer
Rust of Jowar is caused by
jeemain
eamcet
biology
2001
q17
asked
Dec 1, 2013
by
thanvigandhi_1
0
answers
How does stability of chalcogens vary
jeemain
chemistry
unit15
p-block-elements
q17
easy
sec-a
asked
Nov 26, 2013
by
sreemathi.v
1
answer
For all values of $A,B,C$ and $P,Q,R$ the value of the determinant
$(x+a)^3\small\begin{vmatrix}\cos(A-P)&\cos (A-Q)&\cos(A-R)\\\cos(B-P)&\cos(B-Q)&\cos(B-R)\\\cos(C-P)&\cos(C-Q)&\cos(C-R)\end{vmatrix}$ is
jeemain
math
class12
ch4
determinants
q17
evaluate-determinants
difficult
asked
Nov 25, 2013
by
sreemathi.v
1
answer
Species belonging to this genus cause downy mildew disease :
jeemain
eamcet
biology
2000
q17
asked
Nov 24, 2013
by
thanvigandhi_1
0
answers
The genetical importance of raising haploids in higher plants through tissue culture lies their use in the production of
jeemain
eamcet
biology
1999
q17
asked
Nov 22, 2013
by
thanvigandhi_1
0
answers
If the matrix $\begin{bmatrix}a&b\\c&d\end{bmatrix}$ is commutative with the matrix $\begin{bmatrix}1&1\\0&1\end{bmatrix}$ then
jeemain
math
class12
ch3
matrices
q17
operations-on-matrices
medium
asked
Nov 22, 2013
by
sreemathi.v
1
answer
If $A$ and $B$ are square matrices of equal degree,then which one is correct among the following
jeemain
math
ch3
class12
matrices
q17
equality-of-matrices
easy
asked
Nov 20, 2013
by
sreemathi.v
1
answer
The equilibrium constant $K_c$ for the reaction of $H_2$ with $I_2$ is 57.0 at 700 K $ H_2(g) + I_2(g) \rightleftharpoons 2HI $; $K_c$ = 57 at 700K. select correct statement:
jeemain
aipmt
chemistry
equilibrium
medium
q17
biology
asked
Nov 15, 2013
by
mosymeow_1
1
answer
Two identical vessels A and B with frictionless pistons contains the same ideal gas at the same temperature and the same volume V. The masses of gas in A and B and $m_A$ and $m_B$ respectively. The gases are allowed to expand isothermally to the same final volume 2V. The change in pressures of the gas in A and B are found to be $\Delta P$ and $1.5 \Delta\;P$respectively. Then:
jeemain
eamcet
physics
2004
q17
asked
Nov 13, 2013
by
meena.p
1
answer
If $\alpha, \beta, \gamma$ are the roots of $x^3+2x^2-3x-1=0$, then $\alpha^{-2}+\beta^{-2}+\gamma^{-2}=$
jeemain
eamcet
math
2005
q17
asked
Nov 11, 2013
by
meena.p
1
answer
Study the following lists
jeemain
eamcet
biology
2010
q17
asked
Nov 10, 2013
by
thanvigandhi_1
0
answers
'Natalite' is used as:
jeemain
eamcet
chemistry
2005
q17
asked
Nov 8, 2013
by
meena.p
1
answer
$A= \begin {bmatrix} 1 & 2 & 2 \\ 2 & 1 & 2 \\ 2 & 2 & 1 \end {bmatrix}$ then $A^3-4A^2-6A$ is equal to :
jeemain
eamcet
math
2006
q17
asked
Nov 5, 2013
by
meena.p
1
answer
The vector $\hat i+x\hat j+3\hat k$ is rotated about angle $\theta$ and is doubled in magnitude, then it becomes $4\hat i+(4x-2)\hat j+2\hat k$. The value of $x=?$
jeemain
math
class12
ch10
vector-algebra
easy
addition-of-vectors
q17
asked
Nov 4, 2013
by
rvidyagovindarajan_1
1
answer
Which of the following set of variables give a straight line with a negative slope when plotted? (P= vapour pressure. T= Temperature in K)
jeemain
eamcet
chemistry
2006
q17
asked
Oct 30, 2013
by
meena.p
1
answer
Calculate the mass of $CaO$ that shall be obtained by heating 20 kg of 80 % pure lime-stone $(CaCO_3)$
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
law-of-chemical-combination
q17
easy
asked
Oct 30, 2013
by
sreemathi.v
1
answer
The temperature of a thin uniform circular disc, of one meter diameter is increased by $10^{\circ}C$. The percentage increase in moment of inertia of the disc about an axis passing through its center and perpendicular to the circular face: (linear coefficient of expansion $=11 \times 10^{-6}/^{\circ}C)$
jeemain
eamcet
physics
2006
q17
asked
Oct 29, 2013
by
meena.p
1
answer
Which of the following disease is caused by a fungus?
jeemain
eamcet
biology
2011
q17
asked
Oct 26, 2013
by
thanvigandhi_1
1
answer
If $\alpha,\beta,\gamma$ are the roots of $x^3-2x^2+3x-4=0,$ then the value of $\alpha^2\beta^2+\beta^2 \gamma^2+\gamma^2 \alpha^2$ is
jeemain
eamcet
math
2007
q17
asked
Oct 24, 2013
by
meena.p
1
answer
Which of the following is a biodegradable polymer?
jeemain
eamcet
chemistry
2007
q17
asked
Oct 23, 2013
by
meena.p
0
answers
The oxide of an element contains 32.33 percent of the element and the vapor density of its chloride is 79.Calculate the atomic mass of the element.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
atomic-and-molecular-masses
q17
medium
asked
Oct 23, 2013
by
sreemathi.v
1
answer
Two gases A and B having same pressure P, volume V and absolute temperature T are mixed. If the mixture has the volume and temperature as V and T respectively , then the pressure of the mixture is
jeemain
eamcet
physics
2007
q17
asked
Oct 22, 2013
by
meena.p
1
answer
The value of the expression $\large\frac{\sin^3x}{1+\cos x}+\frac{\cos^3x}{1-\sin x}$ is
jeemain
math
class11
ch3
trigonometric-functions
q17
trignometric-equations
difficult
asked
Oct 21, 2013
by
sreemathi.v
1
answer
The sum of the fourth powers of the of the equation $x^3+x+1=0$ is
jeemain
eamcet
math
2008
q17
asked
Oct 17, 2013
by
meena.p
1
answer
Identify the wrong answer
jeemain
eamcet
biology
2012
q17
asked
Oct 16, 2013
by
thanvigandhi_1
1
answer
If $x\in(\pi,2\pi)$ and $\large\frac{\sqrt{1+\cos x}+\sqrt{1-\cos x}}{\sqrt{1+\cos x}-\sqrt{1-\cos x}}$$=\cot\big(a+\large\frac{x}{2}\big)$ then $'a'$ is equal to
jeemain
math
class11
ch3
trigonometric-functions
q17
trignometric-identities
medium
asked
Oct 15, 2013
by
sreemathi.v
1
answer
If $x,y,z$ are all positive and are the $p$th, $q$th and $r$th terms of a geometric progression respectively, then the value of the determinant $\begin{vmatrix} \log x & p & 1 \\ \log z & r &1 \\ \log z & r & 1 \end{vmatrix}=$
jeemain
eamcet
math
2009
q17
asked
Oct 9, 2013
by
meena.p
1
answer
If $A+B=\large\frac{\pi}{3}$ where $A,B\in R^+$ then the minimum value of $\sec A+\sec B$ is equal to
jeemain
math
class11
ch3
trigonometric-functions
q17
trignometric-equations
easy
asked
Oct 7, 2013
by
sreemathi.v
1
answer
As square box of water has a small hole located in one of the bottom corner. When the box is full and sitting on level surface complete opening of the hole results in a flow of water with speed $v_0.$ When box is half empty, it is lilted by $45^{\circ}$. So that the hole is at lowest position. Now the water will flow with speed of
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q17
medium
asked
Oct 3, 2013
by
meena.p
1
answer
Triple fusion was discovered in this plant possessing naked bulb, fleshy leaf bases and loculicidal capsule.
jeemain
eamcet
biology
2013
q17
asked
Oct 3, 2013
by
thanvigandhi_1
1
answer
If the system of equations :$(k+1)^3x+(k+2)^3y=(k+3)^3 \;;\;(k+1)x+(k+2)y=k+3\;;\;x+y=1$ is consistent, then the value of $k$ is :
jeemain
eamcet
math
2010
q17
asked
Sep 26, 2013
by
meena.p
1
answer
The solution of the differential equation $\large\frac{dy}{dx}=\frac{y}{x}+\frac{\phi (y/x)}{\phi ' (y/x)}$ is
jeemain
eamcet
math
2011
q17
asked
Sep 20, 2013
by
meena.p
1
answer
The system of equations $3x+2y+z=6, 3x+4y+3z=14, 6x+10 y +8z=a,$ has infinite number of solutions, if $a=$
jeemain
eamcet
math
2013
q17
asked
Sep 14, 2013
by
meena.p
1
answer
If $\overrightarrow {a}, \overrightarrow {b}, \overrightarrow {c}$ are mutually perpendicular unit vectors, then $ |\overrightarrow {a}+ \overrightarrow {b}+ \overrightarrow {c}|$=.................. .
jeemain
eamcet
math
1991
fitb
q17
asked
Sep 13, 2013
by
meena.p
0
answers
The inverse element of $\omega ^2$ in the multiplicative catine group $\{1, \omega,\omega ^2\}$ where $\omega$ is the cube roots of unity, is :
jeemain
eamcet
math
1991
q17
asked
Sep 13, 2013
by
meena.p
1
answer
$9.8\;g$ of $H_2 SO_4$ is present in two liters of a solution. The molarity of the solution is :
jeemain
eamcet
chemistry
1991
q17
asked
Sep 11, 2013
by
meena.p
1
answer
When the radius of a circular current carrying coil is doubled, and current in it is halved, the magnetic dipole moment of coil originally 4 units become ............... units.
jeemain
eamcet
physics
1991
fitb
q17
asked
Sep 11, 2013
by
meena.p
0
answers
A charge $\mathit{q}\;$ is placed at the center of line joining two equal charges Q. The system of 3 charges will be in equilibrium if $\mathit{q}\;$ is equal to:
jeemain
eamcet
physics
1991
q17
asked
Sep 10, 2013
by
meena.p
1
answer
Refer to the below equation :
jeemain
chemistry
unit22
organic-chemistry
halogens
q17
medium
asked
Sep 3, 2013
by
sreemathi.v
1
answer
Calculate work done to move a body of mass 10 kg along an incline $(\theta=30^{\circ})$ with constant velocity through a distance 10 m $(g=10 m/s^2)$
jeemain
physics
class11
ch6
work-power-energy
q17
easy
work
work-done-by-a-constant-force
asked
Jul 18, 2013
by
meena.p
1
answer
An object initially at rest explodes into three fragments. A,B and C The momentum of A is P$ \overrightarrow i $ that of B is $\sqrt 3$ P $\overrightarrow j$ where P is positive number. The momentum of C into be
jeemain
physics
class11
unit3
laws-of-motion
q17
medium
asked
Jul 5, 2013
by
meena.p
1
answer
An athletic coach told his team that muscle times speed is equal to power. What dimension does he view for muscle ?
jeemain
physics
class11
ch2
units-and-measurement
q17
easy
dimensional-formulae-and-analysis
asked
Jun 17, 2013
by
meena.p
1
answer
The radius of a cylinder is increasing at the rate of $2$ cm/sec and its altitude is decreasing at the rate of $3$cm/sec . The rate of change of volume when the radius is $3$cm and the altitude is $5$cm is
tnstate
class12
bookproblem
p230
objective
q17
modelpaper
jun-2007
asked
May 15, 2013
by
poojasapani_1
1
answer
The system of equations $ax+y+z=0; x+by+z=0; x+y+cz=0 $ has a non-trivial solution then $\large\frac{1}{1-a}+\frac{1}{1-b}+\frac{1}{1-c}=$
tnstate
class12
bookproblem
p264
objective
q17
modelpaper
mar-2007
mar-2009
asked
May 7, 2013
by
poojasapani_1
1
answer
Using vector method prove that : $d)\;\cos (A+B)=\cos A\cos B+\sin A\sin B$
cbse
class12
additionalproblem
kvquestionbank2012
ch10
q17
q17-d
p36
medium
sec-b
math
asked
Apr 22, 2013
by
sreemathi.v
1
answer
Using vector method prove that : $c)\;\cos (A+B)=\cos A\cos B-\sin A\sin B$
cbse
class12
additionalproblem
kvquestionbank2012
ch10
q17
q17-c
p36
medium
sec-b
math
asked
Apr 22, 2013
by
sreemathi.v
1
answer
Using vector method prove that : $b)\;\sin (A-B)=\sin A\cos B-\cos A\sin B$
cbse
class12
additionalproblem
kvquestionbank2012
ch10
q17
q17-b
p36
medium
sec-b
math
asked
Apr 22, 2013
by
sreemathi.v
1
answer
Find the vector equation of the plane through the points (2,1,-1) and (-1,3,4) and perpendicular to the plane x-2y+4z=10.
cbse
class12
modelpaper
2013
sec-b
q21
q21-2
65-1
q17
q17-2
65-2
q15
q15-2
65-3
math
asked
Mar 20, 2013
by
sreemathi.v
1
answer
Show that the lines $\begin{array}{1 1}\overrightarrow{r}=3\hat{i}+2\hat{j}-4\hat{k}+\lambda(\hat{i}+2\hat{j}+2\hat{k});\\\overrightarrow{r}=5\hat{i}-2\hat{j}+\mu(3\hat{i}+2\hat{j}+6\hat{k})\end{array} $ are intersecting. Hence find their point of intersection.
cbse
class12
modelpaper
2013
sec-b
q21
q21-1
65-1
q17
q17-1
65-2
q15
q15-1
65-3
math
asked
Mar 20, 2013
by
sreemathi.v
1
answer
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