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Recent questions in CBSE XI
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CBSE XI
CBSE XI
Math
Physics
Chemistry
Biology
Propane when treated with conc. Nitric acid at 723 K gives
cbse
class11
chemistry
neet
hydrocarbon
asked
May 9, 2017
by
meena.p
1
answer
With the increase in branching, the boiling point
cbse
class11
chemistry
neet
hydrocarbon
asked
May 9, 2017
by
meena.p
1
answer
The addition reaction of carbon-carbon double bonds are
cbse
class11
chemistry
neet
hydrocarbon
asked
May 9, 2017
by
meena.p
1
answer
The reactivity of a hydrogen in an alkane depends on
cbse
class11
chemistry
neet
hydrocarbon
asked
May 9, 2017
by
meena.p
1
answer
Alkane molecules are not attacked by electrophiles or neutrophiles because they are
cbse
class11
chemistry
neet
hydrocarbon
asked
May 9, 2017
by
meena.p
1
answer
Wide range of different hydrocarbons are separated into fractions
cbse
class11
chemistry
neet
hydrocarbon
asked
May 9, 2017
by
meena.p
1
answer
Aromatic compounds are known as
cbse
class11
chemistry
neet
hydrocarbon
asked
May 9, 2017
by
meena.p
1
answer
Due to presence of double bonds, alkenes are
cbse
class11
chemistry
neet
hydrocarbon
asked
May 9, 2017
by
meena.p
1
answer
Carbon monoxide is a gas which is
cbse
class11
chemistry
neet
hydrocarbon
asked
May 9, 2017
by
meena.p
1
answer
which of the following compounds can be used as antifreeze in automobile radiators ?
cbse
class11
chemistry
neet
ethers
asked
May 5, 2017
by
meena.p
1
answer
An ether is more volatile than an alcohol having the same molecular formula. This is due to
cbse
class11
chemistry
neet
ethers
asked
May 5, 2017
by
meena.p
1
answer
The reaction of phenol with choloroform in the presence of dilute sodium hydroxide finally introduces, which of the following functional group ?
cbse
class11
chemistry
neet
ethers
asked
May 5, 2017
by
meena.p
1
answer
Consider the following reaction : the produce Z is
cbse
class11
chemistry
neet
ethers
asked
May 5, 2017
by
meena.p
1
answer
Among the following four compounds <br>(A)Phenol <br> (B)Methylphenol <br>(C)meta−nitrophenol <br> (D)Para−nitrophenol <br> the acidity order is
cbse
class11
chemistry
neet
ethers
asked
May 5, 2017
by
meena.p
1
answer
The functional isomers of ethane nitrile is
cbse
class11
chemistry
neet
isomers
asked
Apr 19, 2017
by
meena.p
1
answer
Number of dibromo derivatives possible for propane are
cbse
class11
chemistry
neet
isomers
asked
Apr 19, 2017
by
meena.p
1
answer
Which of the following conformations of n-butane is the least stable ?
cbse
class11
chemistry
neet
isomers
asked
Apr 19, 2017
by
meena.p
1
answer
Total number of conformations of ethane are
cbse
class11
chemistry
neet
isomers
asked
Apr 19, 2017
by
meena.p
1
answer
Which of the following compounds is isomeric with trimethyl amine ?
cbse
class11
chemistry
neet
isomers
asked
Apr 19, 2017
by
meena.p
1
answer
Which of the following pairs of compounds are tautomers ?
cbse
class11
chemistry
neet
isomers
asked
Apr 19, 2017
by
meena.p
1
answer
How many optically active stereoisomers are possible for butane-$2,3-diol?$
cbse
class11
chemistry
neet
isomers
asked
Apr 19, 2017
by
meena.p
1
answer
An isomer of ethanol is:
cbse
class11
chemistry
neet
isomers
asked
Apr 19, 2017
by
meena.p
1
answer
The isomers which can be inter converted through rotation around a single bond are:
cbse
class11
chemistry
neet
isomers
asked
Apr 19, 2017
by
meena.p
1
answer
Which of the following compounds will exhibit cis-trans isomerism?
cbse
class11
chemistry
neet
isomers
asked
Apr 19, 2017
by
meena.p
1
answer
Raju drops a pile of marbles from the top of a roof located 8.52m8.52m above the ground. Determine the time required for the marbles to reach the ground .
motion-in-a-straight-line
aims
aipmt
asked
Mar 19, 2017
by
humraz03
1
answer
which of the following reactions r redox reactions?
asked
May 20, 2016
by
stubbynaavi9112000
0
answers
3x2−11xy+10y2−7x+13y+k=0 denotes a pair of straight lines find the value of k
asked
May 12, 2015
by
harsha260997
1
answer
if the pair of straight lines x^2-2pxy-y^2=0 and x^2-2qxy-y^2=0 be such that each pair bisects the angles between the other pair prove that pq= -1
pair
of
straight
line
asked
Feb 21, 2015
by
tanvirahmedodesk
1
answer
Let $(x_1,y_1)$ be the point of intersection of the tangent to the parabola $y^2=4ax$ at the points $t_1$ and $t_2$ . Then $x_1=a{t_1}{t_2}$ and $y_1=a(t_1+t_2)$
parabola
asked
Feb 20, 2015
by
tanvirahmedodesk
1
answer
how to remember equation of tangent . can you show how did you find out Equation of tangent at $(a{t_1}^2,2a{t_1})$ is
parabola
asked
Feb 19, 2015
by
tanvirahmedodesk
1
answer
locus of the point of intersection of tangent to $y^2=4ax$ which intercept a constant length d on the directrix
asked
Jan 17, 2015
by
tanvirahmedodesk
1
answer
Find equation the circum circle of triangle ABC with A(1,0),B(-1,0)C(0,0)
straight
lines
asked
Oct 19, 2014
by
iyerrajen
1
answer
Show that the point $(x,y)$ given by $x=\large\frac{2at}{1+t^2}$ and $y=\large\frac{a(1-t^2)}{1+t^2}$ lies on a circle for all real values of $t$ such that $-1\leq t \leq 1$ where $a$ is any given real numbers.
cbse
class11
math
conic-sections
circle
exemplar
sec-b
medium
q2
asked
Oct 17, 2014
by
sreemathi.v
1
answer
Equation of the hyperbola with eccentricity $\large\frac{3}{2}$ and foci at $(\pm 2,0)$ is
cbse
class11
math
conic-sections
hyperbola
exemplar
sec-a
easy
q59
asked
Oct 17, 2014
by
sreemathi.v
1
answer
The distance between the foci of a hyperbola is $16$ and its eccentricity is $\sqrt 2$.Its equation is
cbse
class11
math
conic-sections
hyperbola
exemplar
sec-a
easy
q58
asked
Oct 17, 2014
by
sreemathi.v
1
answer
The eccentricity of the hyperbola whose latus rectum is $8$ and conjugate axis is equal to half of the distance between the foci is
cbse
class11
math
conic-sections
hyperbola
exemplar
sec-a
easy
q57
asked
Oct 17, 2014
by
sreemathi.v
1
answer
If $e$ is the eccentricity of the ellipse $\large\frac{x^2}{a^2}+\frac{y^2}{b^2}\normalsize =1\;(a < b)$,then
cbse
class11
math
conic-sections
ellipse
exemplar
sec-a
easy
q56
asked
Oct 17, 2014
by
sreemathi.v
1
answer
The length of the latus rectum of the ellipse $3x^2+y^2=12$ is
cbse
class11
math
conic-sections
ellipse
exemplar
sec-a
easy
q55
asked
Oct 16, 2014
by
sreemathi.v
1
answer
The equation of the ellipse whose focus is $(1,-1)$,the directrix the line $x-y-3=0$ and eccentricity $\large\frac{1}{2}$ is
cbse
class11
math
conic-sections
ellipse
exemplar
sec-a
medium
q54
asked
Oct 16, 2014
by
sreemathi.v
2
answers
If the vertex of the parabola is the point $(-3,0)$ and the directrix is the line $x+5=0$,then its equation is
cbse
class11
math
conic-sections
parabola
exemplar
sec-a
easy
q53
asked
Oct 16, 2014
by
sreemathi.v
1
answer
If the parabola $y^2=4ax$ passes through the point $(3,2)$,then the length of its latus rectum is
cbse
class11
math
conic-sections
parabola
exemplar
sec-a
easy
q52
asked
Oct 16, 2014
by
sreemathi.v
1
answer
If the focus of a parabola is $(0,-3)$ and its directrix is $y=3$,then its equation is
cbse
class11
math
conic-sections
parabola
exemplar
sec-a
easy
q51
asked
Oct 16, 2014
by
sreemathi.v
1
answer
The equation of a circle with origin as centre and passing through the vertices of an equilateral triangle whose median is of length $3a$ is
cbse
class11
math
conic-sections
circle
exemplar
sec-a
easy
q50
asked
Oct 16, 2014
by
sreemathi.v
1
answer
Equation of the circle with centre on the $y$-axis and passing through the origin and the point $(2,3)$ is
cbse
class11
math
conic-sections
circle
exemplar
sec-a
medium
q49
asked
Oct 16, 2014
by
sreemathi.v
1
answer
Equation of a circle which passes through $(3,6)$ and touches the axes is
cbse
class11
math
conic-sections
circle
exemplar
sec-a
medium
q48
asked
Oct 16, 2014
by
sreemathi.v
1
answer
The area of the circle centred at $(1,2)$ and passing through $(4,6)$ is
cbse
class11
math
conic-sections
circle
exemplar
sec-a
easy
q47
asked
Oct 16, 2014
by
sreemathi.v
1
answer
The equation of the hyperbola with vertices at $(0,\pm 6)$ and eccentricity $\large\frac{5}{3}$ is _________ and its foci are ___________
cbse
class11
math
conic-sections
hyperbola
exemplar
sec-a
medium
q46
asked
Oct 16, 2014
by
sreemathi.v
1
answer
The equation of the parabola having focus at $(-1,-2)$ and the directrix $x-2y+3=0$ is _________
cbse
class11
math
conic-sections
parabola
exemplar
sec-a
medium
q45
asked
Oct 16, 2014
by
sreemathi.v
1
answer
The equation of the ellipse having foci $(0,1),(0,-1)$ and minor axis of length $\sqrt 5$ is ____________
cbse
class11
math
conic-sections
ellipse
exemplar
sec-a
medium
q44
asked
Oct 16, 2014
by
sreemathi.v
1
answer
An ellipse is described by using an endless string which is passed over two pins.If the axes are 6 cm and 4 cm,the length of the string and distance between the pins are ____________
cbse
class11
math
conic-sections
ellipse
exemplar
sec-a
medium
q43
asked
Oct 16, 2014
by
sreemathi.v
1
answer
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