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Recent questions in CBSE XI
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CBSE XI
CBSE XI
Math
Physics
Chemistry
Biology
What is a taxonomic key? How is it helpful in identification and classification of an organism?
class11
biology
sec-b
the living world
asked
Jun 24, 2019
by
swapnarajan1982
1
answer
Why are living things classified?
class11
biology
sec-b
the living world
asked
Jun 24, 2019
by
swapnarajan1982
1
answer
The unit of LIR [L is inductance , R is Resistance ]
cbse11
physics
ch1
units-and-measurement
asked
Jun 24, 2019
by
meena.clay6
1
answer
$\mu_0$ and $\in_0$ denote the permeability and permittivity of free space, dimension of $\mu_0 \in_0$ are
cbse11
physics
ch1
units-and-measurement
asked
Jun 24, 2019
by
meena.clay6
1
answer
Which of the following is not unit of time
cbse11
physics
ch1
units-and-measurement
asked
Jun 24, 2019
by
meena.clay6
1
answer
in $S= a+b+ct^2$ s is measured in and t in seconds . The unit of c is
cbse11
physics
ch1
units-and-measurement
asked
Jun 24, 2019
by
meena.clay6
1
answer
Dimensional formula of force
cbse11
physics
ch1
units-and-measurement
asked
Jun 24, 2019
by
meena.clay6
1
answer
State significant figure is the following $0.0006032\;m^2$
cbse11
physics
ch1
units-and-measurement
asked
Jun 24, 2019
by
meena.clay6
1
answer
In the relation $\large\frac{dx}{dy}$$=2 \omega \sin(\omega t +\phi)$, the dimensional formula for $(\omega t+\phi)$ is
cbse11
physics
ch1
units-and-measurement
asked
Jun 24, 2019
by
meena.clay6
1
answer
What is a monograph?
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
How does a manual serve as a taxonomic aid?
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
Name one chemical used as a fungicide for preserving herbaria.
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
Name the genus that comprises lion, tiger and leopard.
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
What is the technical term given to the family of cats?
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
What is a genus?
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
Define the term species.
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
Define “taxon”.
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
What is classification?
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
What is advantage of scientific names?
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
What is meant by nomenclature?
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
What is taxonomy?
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
Define bio diversity.
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
Name two animals which do not reproduce at all.
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
Give two example of organisms that reproduce by fragmentation.
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
What is meant by metabolism?
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
What are the two codes of nomenclature?
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
Name the highest category of classification.
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
Who gave the binomial system of classification?
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
Write the correct order of sequence of taxonomical categories.
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
class11,biology,sec-a,the living world
class11
biology
sec-a
the living world
asked
Jun 20, 2019
by
swapnarajan1982
1
answer
Name the three fields of systematics.
class 11
biology
the-living-world
sec-a
asked
Jun 20, 2019
by
meena.clay6
1
answer
What is the relationship between frequency and wavelength of light?
cbse
class11
chemistry
ch2
structure-of-atom
asked
May 20, 2019
by
meena.clay6
1
answer
Neutrons can be found in all atomic nuclei except in one case. Which is this atomic nucleus and what does it consists of?
cbse
class11
chemistry
ch2
structure-of-atom
asked
May 20, 2019
by
meena.clay6
1
answer
Which are isosters ?
cbse
class11
chemistry
ch2
structure-of-atom
asked
May 16, 2019
by
meena.clay6
1
answer
Calculate the wave number of lines having the frequency of $5 \times 10^{16}$ cycles per sec
cbse
class11
chemistry
ch2
structure-of-atom
asked
May 16, 2019
by
meena.clay6
1
answer
Calculate the ratio of K.E and P.E of an electron in an orbit?
cbse
class11
chemistry
ch2
structure-of-atom
asked
May 16, 2019
by
meena.clay6
1
answer
Calculate the accelerating potential that must be applied to a proton beam to give it an effective wavelength of 0.005 nm.
cbse
class11
chemistry
ch2
structure-of-atom
asked
May 16, 2019
by
meena.clay6
1
answer
calculate the Broglie wavelength of an electron moving with 1% of the speed of light ?
cbse
class11
chemistry
ch2
structure-of-atom
asked
May 16, 2019
by
meena.clay6
1
answer
What is common between $d_{xy}$ and $d_{x2-y2}$ orbitals ?
cbse
class11
chemistry
ch2
structure-of-atom
asked
May 16, 2019
by
meena.clay6
1
answer
Calculate energy of 2 moles of photons of radiation whose frequency is $5 \times 10^{34}\;Hz$
cbse
class11
chemistry
ch2
structure-of-atom
asked
May 16, 2019
by
meena.clay6
1
answer
What is relative mass and charge of an electron?
cbse
class11
chemistry
ch2
structure-of-atom
asked
May 15, 2019
by
meena.clay6
1
answer
Define the term scintillations?
cbse
class11
chemistry
ch2
structure-of-atom
asked
May 15, 2019
by
meena.clay6
1
answer
Why some atoms shows radioactivity?
cbse
class11
chemistry
ch2
structure-of-atom
asked
May 15, 2019
by
meena.clay6
1
answer
Which one of the following is not true ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
May 15, 2019
by
meena.clay6
1
answer
Equal moles of hydrogen and oxygen gases are placed in a container with a pin- hole through which both can escape. what fraction of the oxygen escapes in the time required for one half of the hydrogen to escape ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
May 15, 2019
by
meena.clay6
1
answer
What is limiting reagent?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
May 15, 2019
by
meena.clay6
1
answer
Calculate the amount of water in gm produced by the combustion of 8 gms of Ethane
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
May 15, 2019
by
meena.clay6
1
answer
What is heterogeneous mixture? Give an example.
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
May 15, 2019
by
meena.clay6
1
answer
If $500\;mL$ of a 5 M solution is diluted to 1500 mL, what will be the molarity of the solution obtained ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
May 14, 2019
by
meena.clay6
1
answer
An oxide of metal contains $60\%$ of the metal. What will be the equivalent weight of the metal ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
May 14, 2019
by
meena.clay6
1
answer
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