Recent questions in CBSE XI

Propane when treated with conc. Nitric acid at 723 K gives

asked May 9, 2017 by meena.p

1 answer

With the increase in branching, the boiling point

asked May 9, 2017 by meena.p

1 answer

The addition reaction of carbon-carbon double bonds are

asked May 9, 2017 by meena.p

1 answer

The reactivity of a hydrogen in an alkane depends on

asked May 9, 2017 by meena.p

1 answer

Alkane molecules are not attacked by electrophiles or neutrophiles because they are

asked May 9, 2017 by meena.p

1 answer

Wide range of different hydrocarbons are separated into fractions

asked May 9, 2017 by meena.p

1 answer

Aromatic compounds are known as

asked May 9, 2017 by meena.p

1 answer

Due to presence of double bonds, alkenes are

asked May 9, 2017 by meena.p

1 answer

Carbon monoxide is a gas which is

asked May 9, 2017 by meena.p

1 answer

which of the following compounds can be used as antifreeze in automobile radiators ?

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

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 ?

asked May 5, 2017 by meena.p

1 answer

Consider the following reaction : the produce Z is

asked May 5, 2017 by meena.p

1 answer

Among the following four compounds (A)Phenol (B)Methylphenol (C)meta−nitrophenol (D)Para−nitrophenol the acidity order is

asked May 5, 2017 by meena.p

1 answer

The functional isomers of ethane nitrile is

asked Apr 19, 2017 by meena.p

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Number of dibromo derivatives possible for propane are

asked Apr 19, 2017 by meena.p

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Which of the following conformations of n-butane is the least stable ?

asked Apr 19, 2017 by meena.p

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Total number of conformations of ethane are

asked Apr 19, 2017 by meena.p

1 answer

Which of the following compounds is isomeric with trimethyl amine ?

asked Apr 19, 2017 by meena.p

1 answer

Which of the following pairs of compounds are tautomers ?

asked Apr 19, 2017 by meena.p

1 answer

How many optically active stereoisomers are possible for butane- $2,3-diol?$

asked Apr 19, 2017 by meena.p

1 answer

An isomer of ethanol is:

asked Apr 19, 2017 by meena.p

1 answer

The isomers which can be inter converted through rotation around a single bond are:

asked Apr 19, 2017 by meena.p

1 answer

Which of the following compounds will exhibit cis-trans isomerism?

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 .

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

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 $y_1=a(t_1+t_2)$

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

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)

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.

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

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

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

asked Oct 17, 2014 by sreemathi.v

1 answer