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Questions asked by meena.clay6
Questions
652
questions
0
answers selected
When is the energy of electron regarded as zero.
cbse
class11
chemistry
ch2
structure-of-atom
asked
Jul 3, 2019
1
answer
How many unpaired electrons are present in Pd (Z = 46) ?
cbse
class11
chemistry
ch2
structure-of-atom
asked
Jul 3, 2019
1
answer
Which element does not have any neutron?
cbse
class11
chemistry
ch2
structure-of-atom
asked
Jul 3, 2019
1
answer
Yellow light emitted from a sodium lamp has a wavelength $(\lambda)$ of 580 nm. Calculate thefrequency $(ν)$ and wave number of the yellow light.
cbse
class11
chemistry
ch2
structure-of-atom
asked
Jul 3, 2019
0
answers
Volt is equivalent to
cbse11
physics
ch1
units-and-measurement
asked
Jul 2, 2019
1
answer
If $x=at+bt^2$ where x is distance in km and t is time , then unit of b is
cbse11
physics
ch1
units-and-measurement
asked
Jul 2, 2019
1
answer
The nearest star to our solar system is 4.29 light years away. How much is this distance in terms of parsecs?
cbse11
physics
ch1
units-and-measurement
asked
Jul 2, 2019
1
answer
Which is different from others by units
cbse11
physics
ch1
units-and-measurement
asked
Jul 2, 2019
1
answer
In a certain system of units, 1 unit of time is 5 seconds, 1 unit of mass is 20 kg and 1 unit of length is 10 m. In this system one unit of length is 10m. In this system of power will correspond to
cbse11
physics
ch1
units-and-measurement
asked
Jul 2, 2019
1
answer
The SI unit of the inductance, the Henry cannot be written as
cbse11
physics
ch1
units-and-measurement
asked
Jul 2, 2019
1
answer
The error in measuring radius of sphere is $0.2\%$. What is permissible error in it volume
cbse11
physics
ch1
units-and-measurement
asked
Jul 1, 2019
1
answer
The dimensions of Reynolds's number are
cbse11
physics
ch1
units-and-measurement
asked
Jul 1, 2019
1
answer
Compare the wavelengths for the first three lines in the Balmer series with those which arise from similar
cbse
class11
chemistry
ch2
structure-of-atom
asked
Jun 28, 2019
1
answer
A 1 MeV proton is sent against a gold leaf (Z = 79). Calculate the distance of closest approach for head on collision.
cbse
class11
chemistry
ch2
structure-of-atom
asked
Jun 28, 2019
1
answer
Atomic number of an element is equal to the number of
cbse
class11
chemistry
ch2
structure-of-atom
asked
Jun 27, 2019
1
answer
The angular momentum of electrons in d orbital is equal to
cbse
class11
chemistry
ch2
structure-of-atom
asked
Jun 27, 2019
1
answer
Write 3 points of difference between electromagnetic waves and matter waves
cbse
class11
chemistry
ch2
structure-of-atom
asked
Jun 27, 2019
1
answer
Calculate the total number of angular nodes and radial nodes present in 30 orbitals
cbse
class11
chemistry
ch2
structure-of-atom
asked
Jun 27, 2019
1
answer
An element with mass number 81 contains $31.7 \%$ more neutrons as compared to protons. Assign the atomic symbol.
cbse
class11
chemistry
ch2
structure-of-atom
asked
Jun 26, 2019
1
answer
The dimension of electrical resistance is
cbse11
physics
ch1
units-and-measurement
asked
Jun 26, 2019
1
answer
The time period (T) depends upon the density 'd' radius 'r' and surface tension S obtain the formats for T by dimensional method
cbse11
physics
ch1
units-and-measurement
asked
Jun 26, 2019
1
answer
Convert 1 newton into dynes
cbse11
physics
ch1
units-and-measurement
asked
Jun 25, 2019
1
answer
The percentage errors in measurement of mass and speed are $2 \%$ and $3\%$. The error in K.E obtained is
cbse11
physics
ch1
units-and-measurement
asked
Jun 25, 2019
1
answer
Unit of modulus of rigidity are
cbse11
physics
ch1
units-and-measurement
asked
Jun 25, 2019
1
answer
In a vernier callipers one main scale division is x cm and n division of vernier scale coincides with $(n-1) $ divisions of main scale least in cm is
cbse11
physics
ch1
units-and-measurement
asked
Jun 25, 2019
1
answer
If force acceleration and time are taken as fundamental quantities , then dimension of length will be
cbse11
physics
ch1
units-and-measurement
asked
Jun 25, 2019
1
answer
The error in measurement of radius sphere is $0.3\%$ What is the permission error in its surface area
cbse11
physics
ch1
units-and-measurement
asked
Jun 25, 2019
1
answer
The unit of LIR [L is inductance , R is Resistance ]
cbse11
physics
ch1
units-and-measurement
asked
Jun 24, 2019
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
1
answer
Which of the following is not unit of time
cbse11
physics
ch1
units-and-measurement
asked
Jun 24, 2019
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
1
answer
Dimensional formula of force
cbse11
physics
ch1
units-and-measurement
asked
Jun 24, 2019
1
answer
State significant figure is the following $0.0006032\;m^2$
cbse11
physics
ch1
units-and-measurement
asked
Jun 24, 2019
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
1
answer
Name the three fields of systematics.
class 11
biology
the-living-world
sec-a
asked
Jun 20, 2019
1
answer
How many triangles can be drawn having its angle as $45^{\circ},64^{\circ}$ and $72^{\circ}$
sat
math
lines-angles-and-triangles
no calculator
asked
May 28, 2019
1
answer
$\cot (-300)=$
sat
math
trigonometry
no calculator
asked
May 28, 2019
1
answer
In 1985 Allen was thrice as old as Judy, but in 1989 he was twice as she was. How old was Allen in 1990 ?
sat
math
linear-equations
no calculator
asked
May 28, 2019
1
answer
If $0 < x< \large\frac{\pi}{2}$ and $\large\frac{\cos x}{1-\sin^2x} = \frac{5}{2}$, what is the value of $\cos x$?
sat
math
trigonometry
no calculator
asked
May 28, 2019
1
answer
The number of terms tournaments won by Harry from the year 2000 to 2004 is shown in the figure given below . What was percentage increase from the year 2001 to 2002 ?
sat
math
problem-solving-and-data-analysis
calculator
asked
May 28, 2019
1
answer
The number of terms tournaments won by Harry from the year 2000 to 2004 is shown in the figure given below . What is the ratio of the tournaments won in the year 2000 to that of the tournaments won in the year 2002 ?
sat
math
problem-solving-and-data-analysis
calculator
asked
May 28, 2019
1
answer
Price per share of stocks A and B on January 1 for 6 years is shown below. What was the average yearly increase in the value of a share of stock A from 2005 to 2010 ?
sat
math
problem-solving-and-data-analysis
no calculator
asked
May 28, 2019
1
answer
Price per share of stocks A and B on January 1 for 6 years is given below. In what year was the percentage increase in the value of a share of stock B the greatest ?
sat
math
problem-solving-and-data-analysis
no calculator
asked
May 28, 2019
1
answer
If $i=-\sqrt{-1}$ then $\large\frac{(5+i)(5-i)}{3-i}$=
sat
math
linear-equations
calculator
asked
May 28, 2019
1
answer
Which value of x will make the fraction undefined ?<br> $\qquad \qquad \qquad \large\frac{x^2}{9x^2-1}$
sat
math
quadratic-equations
no calculator
asked
May 28, 2019
1
answer
Marian's current age is 3 times what Dave's age would be two years from now. Marian is currently 14 year older than Ram. What is the sum of their present ages ?
sat
math
linear-equations
no calculator
asked
May 28, 2019
1
answer
Which of the following are greater than x where $x= \large\frac{5}{11} \\(i) \frac{1}{x} , (ii) \frac{x-1}{x},(iii)\frac{x-1}{x+1}$
sat
math
problem-solving-and-data-analysis
no calculator
asked
May 28, 2019
1
answer
Find the value of $cosec \bigg(\large\frac{2\pi}{3}\bigg)$
sat
math
trigonometry
calculator
asked
May 28, 2019
1
answer
In 1987, a factory produced $18,500$ screws. In 1988 the factory could only 15,000 screws. What is the percentage of decrease in production from 1987 ?
sat
math
problem-solving-and-data-analysis
no calculator
asked
May 28, 2019
1
answer
The following equation represents different curves. <br> $(a)\; x+4y =9 \qquad (b) y^2 = 8(x+3) \qquad (c)\; x^2+y^2 + 2x+3y+8=0$ <br><br> The coordinates of the x-intercept which lies on the curve (b) is
sat
math
circles
no-calculator
asked
May 28, 2019
1
answer
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