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Recent questions tagged cbse
Questions
From Joules law of heating when current I flows through G. resistance R for time t. then Q produced is
cbse
class
12
physics
current-electricity
asked
Mar 20, 2019
by
meena.clay6
1
answer
Kirchhoff's current law for a junction as shown
cbse
class
12
physics
current-electricity
asked
Mar 20, 2019
by
meena.clay6
1
answer
n identical cells each of E and internal resistance r be connected in services The current through load resistance R
cbse
class
12
physics
current-electricity
asked
Mar 20, 2019
by
meena.clay6
1
answer
The electric potential inside a conductivity sphere
cbse
class 12
physics
electrostatic-potential-and-capacitance
asked
Mar 20, 2019
by
meena.clay6
1
answer
Torque acting on a electric dipole in a uniform electric fiels $\hat E$
cbse
class 12
physics
electric charges and fields
asked
Mar 20, 2019
by
meena.clay6
1
answer
Coulombs states that Force between charges is
cbse
class 12
physics
electric charges and fields
asked
Mar 20, 2019
by
meena.clay6
1
answer
Expression for electric field at any point on axial line of electric dipole is
cbse
class 12
physics
electric charges and fields
asked
Mar 20, 2019
by
meena.clay6
1
answer
Net flux through closed surface S is
cbse
class 12
physics
electric charges and fields
asked
Mar 20, 2019
by
meena.clay6
1
answer
How many moles of electron weight one kiligram ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 19, 2019
by
meena.clay6
1
answer
What is molarity of a solution contain $5.84\;gms$ of $NaCl$ in 200 ml of solution ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 19, 2019
by
meena.clay6
1
answer
What is the percentage of carbon , hydrogen and oxygen in ethanol ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 19, 2019
by
meena.clay6
1
answer
What do you mean by gram atomic mass. one million silver atoms weigh $1.79 \times 10^{16}\;g$ . Calculate the gram atomic mass of silver.
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 19, 2019
by
meena.clay6
1
answer
How can we say that sugar is solid and water is liquid ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 19, 2019
by
meena.clay6
1
answer
write the number of moles in 8g of helium
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 19, 2019
by
meena.clay6
1
answer
$4g$ of impure $CaCO_3$ on treatment with excess HCl produces $0.88\; g\; CO_2$. What is the percent purity of $CaCO_3$ sample?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 19, 2019
by
meena.clay6
1
answer
Vapour density of a gas is 22. What is its molecular mass?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
Which pair of species have same percentage of carbon?$(A) CH_3COOH \;and\; C_6H_{12}O_6\\ (B) CH_3COOH\; and\; C_2H_5OH \\ (C) HCOOCH_3 \;and\; C_{12}H_{22}O_{11} \\ (D) C_6H_{12}O_6 \;and C_{12}H_{22}O_{11}$
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
How many moles of electrons weigh one kilogram?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
The density of $2M$ solution of sodium chloride (NaCl) $1.13\; g\; mol/litre$. Calculate molality of the solution. $M= 2$ mol per litre.
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
Calculate the molecular mass of Ethane $(C_2H_6)$
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
Distinguish between pure substance and mixture
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
What is limiting reagent?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
What is a stoichiometry?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 18, 2019
by
meena.clay6
1
answer
How are physicial properties different from chemical properties ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 15, 2019
by
meena.clay6
1
answer
What is the difference between molecules and compounds ? give examples of each
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 15, 2019
by
meena.clay6
1
answer
How much copper can be obtained from 100 g of copper sulphate $(CuSO_4)?$ (Atomic mass of $Cu=63.5\;amu$)
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
Write any four postulates of Daltons atomic theory
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
Calculate the percentage composition of element in methanol $(CH_2OH)$
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
Calculate the formula mass of KCl (Potassium chloride)
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
State Law of Multiple proportions
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
Write the formula used to calculate the % composition of elements
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
What is meant by dimensional analysis?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
$6.02 \times 10^{20}$ molecules of urea are present in 100 mL of its Solution. The concentration of solution is
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 14, 2019
by
meena.clay6
1
answer
When 22.4 L of $H_2(g)$ is mixed with $11.2\;L$ of $Cl_2(g)$ each of at STP the moles of HCl(g) formed is equal to
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 12, 2019
by
meena.clay6
1
answer
If the concentration of glucose $(C_6H_{12}O_6)$ in blood is $0.9\;g\;L^{-1}$. What will be the molarity of glugose in blood ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 12, 2019
by
meena.clay6
1
answer
What will be the molarity of a solution , which contains 5.85 g of Nacl per 500 mL?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 12, 2019
by
meena.clay6
1
answer
The molarity of con.HCl is $1.15\;M$. What volume of con. HCl is required to make 1.00 of 0.1M HCl
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 12, 2019
by
meena.clay6
2
answers
The molarity of con. HCl is 1.15 M; What volume of con. HCl is required to make 1.00 of $0.1\;M\;HCl$
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 11, 2019
by
meena.clay6
1
answer
How much AgCl will be formed by adding 200 ml of 5 M HCl to the solution containing 1.7 gms of $Ag NO_3$?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 11, 2019
by
meena.clay6
1
answer
What is weight of NaOH present in 250 cc of a 2M Solution ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 11, 2019
by
meena.clay6
1
answer
Calculate the number of moles of $H_2SO_4$ present in $50\; ml$ of $0.2 \;m\;H_2SO_4$
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 11, 2019
by
meena.clay6
1
answer
How are physical properties different from chemical properties ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 7, 2019
by
meena.clay6
1
answer
How can we separate the componenets of a compound ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 7, 2019
by
meena.clay6
1
answer
What is the difference between molecules and compounds ?
cbse
class11
chemistry
ch1
some-basic-concepts-of-chemistry
asked
Feb 6, 2019
by
meena.clay6
1
answer
The value of Planck's constant is $6.63 \times 10^{-34} Js$. The speed of light is $3 \times 10^{17} nms^{-1}$. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of $6 \times 10^{15} s^{-1}$ ?
neet
chemistry
past papers
2013
46
cbse
class11
ch2
structure-of-atom
asked
Aug 20, 2018
by
pady_1
1
answer
Find energy of each of the photons which correspond to light of frequency $3\times 10^{15}Hz$.
sat
chemistry
atomic-structure
cbse
class11
ch2
structure-of-atom
asked
Jul 19, 2018
by
swapnarajan1982
1
answer
Atoms consists of protons, neutrons and electrons. If the mass of neutrons and electrons were made half and two times respectively to their actual masses, then the atomic mass of ${_6}C^{12}$
sat
chemistry
atomic-structure
cbse
class11
ch2
structure-of-atom
asked
Jul 17, 2018
by
swapnarajan1982
1
answer
$2\sin ^2\large\frac{3\pi}{4}$$+2\cos^2\large\frac{\pi}{4}$$+2\sec^2\large\frac{\pi}{3}$ =
cl38429
sat
trigonometry
cbse
math
class11
ch3
trigonometric-functions
bookproblem
exercise3-3
q4
sec-b
medium
asked
Jul 3, 2018
by
pady_1
1
answer
What is the maximum distance she travelled carrying a flag ?
math
cbse
class
x
asked
Jan 25, 2018
by
seenvasreddy
1
answer
in an A.P(arithmatic progression). write its next three terms. a + b, (a + 1)
math
class
x
cbse
asked
Dec 30, 2017
by
seenvasreddy
1
answer
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