Corm and rhizome are used as a means of vegetative propagation respectively in

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ANAND_YADAV Asked Jul 25, 2023

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Vegetative propagation in water hyacinth takes place by

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ALOK_RAJ Asked Nov 28, 2023

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The plot of 1/x_A versus 1/y_A (where x_A and y_A are the mole fractions of A in liquid and vapour phases respectively) is linear whose slope and intercept respectively are given as

ALOK_RAJ Asked Nov 28, 2023

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ANAND_YADAV Asked Jul 29, 2023

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An experiment measures quantities $x, y, z$ and then $t$ is calculated from the data as $t=\frac{x y^{2}}{z^{3}}$. If percentage errors in $x , y$ and $z$ are respectively $1 \%, 3 \%, 2 \%$, then percentage error in $t$ is :

ANAND_YADAV Asked Jul 29, 2023

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ALOK_RAJ Asked Nov 27, 2023

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Write two polymers in each case which are (a) thermoplastic type (b) used as fibres.

ALOK_RAJ Asked Nov 27, 2023

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Chandan Asked Aug 13, 2023

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The equivalent conductance of NaCl at concentration C and at infinite dilution are $\lambda_C$ and $\lambda_{\infty}$, respectively. The correct relationship between $\lambda_C$ and $\lambda_{\infty}$ is given as (where, the constant B is positive)

Chandan Asked Aug 13, 2023

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LEELADHAR YADAV Asked Aug 13, 2023

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Consider a relation R defined on set of square matrices A of order 2 satisfying $A^2=I$. If A, B are two such matrices then relation R is defined as $(A, B) \in R \Rightarrow(A B)^{\top}=A^{\top} B^{\top}$. Prove that relation R is reflexive and symmetric.

LEELADHAR YADAV Asked Aug 13, 2023

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AnjaliYadav Asked Jan 2, 2022

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In a fertilized ovule of angiosperms n, 2n and 3n conditions occur respectively in

AnjaliYadav Asked Jan 2, 2022

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The oxidation number of Sulphur in S6, S2F2 and H2S respectively are —

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Chandan Asked Oct 7, 2023

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Hydrogen and oxygen are known to form two componds. The hydrogen contents of the two compounds are 42.9% and 27.3% respectively, Show that this data is in agreement with law of multiple proportions.

Chandan Asked Oct 7, 2023

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Chandan Asked Aug 13, 2023

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In ${PO}_4^{3-}$ ion, the formal charge on each oxygen atom and bond order of P-O bond are respectively

Chandan Asked Aug 13, 2023

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Chandan Asked Aug 13, 2023

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The ionic radii (in Å) of N3-, O2- and F- are respectively

Chandan Asked Aug 13, 2023

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ALOK_RAJ Asked Aug 3, 2023

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The wavelengths and frequency of radiation of photons in transitions 1, 2 and 3 for hydrogen like atom are $\lambda_{1}, \lambda_{2}, \lambda_{3}$ and $v_{1}, v_{2}, v_{3}$ respectively.

ALOK_RAJ Asked Aug 3, 2023

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Shakti Asked Dec 20, 2021

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Sulphur exist in different allotropic forms like S2, S6 and S8 etc. If equal moles of these three forms are taken in separate containers, then the ratio of number of atoms present in them respectively is

Shakti Asked Dec 20, 2021

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Aayush Asked Apr 18

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There are three glass cubes of edges 20 cm, 16 cm and 12 cm respectively. These are melted to form a new cube. Find the edge of the new cube.

Aayush Asked Apr 18

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test Asked Jun 8, 2022

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A compound contains equal masses of the elements A, B and C if the atomic weights of A, B and C are 20, 40 and 60 respectively. The empirical formula of the compound is

test Asked Jun 8, 2022

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Pranav Kumar Asked Sep 4, 2021

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The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and ceiling at the rate of Rs 7.50 per m^2.

Pranav Kumar Asked Sep 4, 2021

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John Michael Asked Aug 11, 2023

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Describe the alternative means of communication in natural calamity. Or, Write a note a Ham radio and satellite communication.

John Michael Asked Aug 11, 2023

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Sanjeev Yadav ji Asked Aug 3, 2023

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Grass is soft, smooth and not rough. It is easily cut. But the poet here has used it as a symbol. What does grass symbolise here?

Sanjeev Yadav ji Asked Aug 3, 2023

by Sanjeev Yadav ji

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ALOK_RAJ Asked Nov 9, 2021

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Hardware used to translate words, sounds, images and actions that people understand into a form that the system unit can process is known as _________.

ALOK_RAJ Asked Nov 9, 2021

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ALOK_RAJ Asked Nov 27, 2023

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Name a polymer used in the manufacture of paints and lacquers.

ALOK_RAJ Asked Nov 27, 2023

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Aayush Asked Feb 7

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If in the equation $y=a \sin (\omega t-K x)$, y and x stands for distance and t for time respectively, then find the dimension of $a, \omega$, and $K$.

Aayush Asked Feb 7

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Ankit Asked Sep 18, 2023

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The sum of focal distance of any point on the ellipse with major and minor axes as 2a and 2b, respectively is equal to

Ankit Asked Sep 18, 2023

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John Michael Asked Aug 12, 2023

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Mean of 100 items is 49 . It was discovered that three items which should have been 60,70 and 80 were wrongly read as 40,20 and 50 respectively. The correct mean is

John Michael Asked Aug 12, 2023

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ALOK_RAJ Asked Jul 25, 2023

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Pollination of flowers by means of ants is known as ______

ALOK_RAJ Asked Jul 25, 2023

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Chandan Asked Aug 26, 2023

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Infinite numbers of flasks are connected to one another as shown above. The volumes and pressures in each flask vary as shown. The stopcocks are initially closed. The common pressure, when all the stopcocks are opened, is

Chandan Asked Aug 26, 2023

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ALOK_RAJ Asked Aug 3, 2023

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The sound energy has wide application in medical science, as well as in many other fields. The sound of high frequency used in medical science is called ultrasound.

ALOK_RAJ Asked Aug 3, 2023

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Ankit Asked Oct 2, 2023

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The speed of a particle as a function of time is represented by V=A$_1$ cosA$_2$t. What are the dimension and S. I. units of constant A$_1$ and A$_2$?

Ankit Asked Oct 2, 2023

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ALOK_RAJ Asked Aug 4, 2023

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n mole of PCl3 and n mole of Cl2 are allowed to react at constant temperature T to have a total equilibrium pressure P1 as :

ALOK_RAJ Asked Aug 4, 2023

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ANAND_YADAV Asked Aug 2, 2023

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The displacement 'x' and time of travel 't' for a particle moving an a straight line are related as $t=$ $\sqrt{(x+1)(x-1)}$. Its acceleration at a time $t$ is

ANAND_YADAV Asked Aug 2, 2023

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ALOK_RAJ Asked Aug 26, 2023

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P is a variable point on a circle with Centre at C. CA and CB are perpendiculars from C to x and y-axis respectively.

ALOK_RAJ Asked Aug 26, 2023

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Chandan Asked Aug 7, 2023

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Two balls A and B are thrown with speeds u and u/2 respectively.

Chandan Asked Aug 7, 2023

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AnjaliYadav Asked Sep 25, 2022

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The Vander Waals constant 'a' for the gases CH4, N2, NH3 and O2 are 2.25,1.39, 4.17 and 1.3 $L ^{2}$ $atm-mol^{-2}$ respectively. The gas which shows highest critical temperature is :

AnjaliYadav Asked Sep 25, 2022

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Aayush Asked Mar 29

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Parwez (V.P.) has some cocks and goats. If the total numbers of heads and feet are 76 and 212 respectively, then find the number of cocks he has.

Aayush Asked Mar 29

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Aayush Asked Feb 2

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The ground state and first excited state energies of hydrogen atom are $-13 \cdot 6 eV$ and $-3.4 eV$ respectively.

Aayush Asked Feb 2

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ALOK_RAJ Asked Nov 28, 2023

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The pH of pure water at $25^{\circ} {C}$ and $35^{\circ} {C}$ are 7 and 6 respectively. The heat of formation of water from H+ and OH- is

ALOK_RAJ Asked Nov 28, 2023

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