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Recent questions tagged q25
Questions
Find the bond angle of $H_2S$.If the S-H bond moment is 0.72D and $\mu=0.95D$
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
bond-parameters
q25
difficult
asked
Mar 10, 2014
by
sreemathi.v
1
answer
Perlon is ?
jeemain
aipmt
chemistry
cbse
unit5
class12
organic-chemistry
polymers
q25
easy
asked
Mar 7, 2014
by
thanvigandhi_1
1
answer
If $'a'$ is the bond moment and $\theta$ is the bond angle between two bonds then the dipolemoment $\mu$ is given by
jeemain
chemistry
unit4
chemical-bonding-and-molecular-structure
q25
easy
asked
Mar 5, 2014
by
sreemathi.v
1
answer
If $a,b,c,d$ are in G.P, then show that $(a^2+b^2+c^2)(b^2+c^2+d^2)=(ab+bc+cd)^2$
cbse
class11
ch9
bookproblem
exercise9-3
medium
sec-b
q25
math
sequences-and-series
asked
Mar 3, 2014
by
rvidyagovindarajan_1
1
answer
Heating of below one produces
jeemain
chemistry
unit13
class12
organic-chemistry
nitrogen
amines
q25
medium
asked
Feb 28, 2014
by
sreemathi.v
1
answer
Some radio waves of frequency of about $1.5 \times 10^9\: Hz$ was received by a radio-telescope from distant star. If the speed of the waves is $3 \times 10^5\: km/s$ , then the wave- length of the wave will be:
jeemain
aipmt
physics
cbse
class12
ch8
electromagnetic-waves
q25
easy
asked
Feb 27, 2014
by
thanvigandhi_1
1
answer
The IUPAC name of $C_6H_5COCl$ is
jeemain
chemistry
class11
organic-chemistry
q25
medium
basic-organic-chemistry
ch12
asked
Feb 21, 2014
by
meena.p
1
answer
Which is a product X of the below reaction:
jeemain
chemistry
unit11
unit12
class12
organic-chemistry
oxygen
aldehyde-and-ketones
q25
easy
asked
Feb 20, 2014
by
sreemathi.v
1
answer
If $10^{-4} dm^3$ of water is introduced into a $1.0dm^3$ flask to 300K. How many moles of water are in the vapour phase when equilibrium is established? (Given Vapour pressure of $H_2O$ at 300K is 3170 Pa ; $R = 8.314JK^{-1}mol^{-1}$
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
liquifaction-of-gases
easy
q25
asked
Feb 14, 2014
by
sharmaaparna1
1
answer
Two aqueous solution X and Y are separated by a semipermeable membrane.If the vapour pressure of solution X is greater than the vapour pressure of solution Y,then the solvent water
jeemain
chemistry
class12
unit2
solutions
q25
easy
asked
Feb 12, 2014
by
sreemathi.v
1
answer
Find the joint equation of lines $x+y+1=0$ & $x+y-1=0$
jeemain
math
class11
coordinate-geometry
straight-lines
equations-of-a-line
ch10
q25
medium
asked
Feb 4, 2014
by
sreemathi.v
1
answer
General solution of following differential $\in a ^n$ differential equations of a family of circles passing through the origin and having centre on the x axis
jeemain
math
class12
ch9
differential-equations
formation-of-differential-equations
q25
easy
asked
Feb 3, 2014
by
meena.p
1
answer
The hybridisation of Fe in $[Fe(H_2O)_5NO]SO_4$ is
jeemain
chemistry
class12
coordination-compounds
unit9
q25
easy
asked
Jan 31, 2014
by
sreemathi.v
1
answer
The diode connected in forward bias has zero resistance and if connected in reverse biase has infinity resistance Find the effective resistance across A and B the given circuit.
jeemain
physics
class12
unit19
ch14
q25
medium
junction-diodes
semiconductor-electronics
asked
Jan 27, 2014
by
meena.p
1
answer
Which of the following alkaline earth metal hydroxide is amphoteric in nature?
jeemain
chemistry
class11
s-block-elements
unit10
q25
easy
asked
Jan 27, 2014
by
sreemathi.v
1
answer
$ ^{\sim}(p \leftrightarrow q)$ is equivalent to
jeemain
math
mathematical-reasoning
class11
ch14
difficult
implications-(tautology-contradiction.)
q25
asked
Jan 23, 2014
by
thanvigandhi_1
1
answer
Hard water is passed through an ionic exchange resin containing -$SO_3H$ group.The out coming water is free from the following ions.
jeemain
chemistry
class11
hydrogen
unit9
q25
easy
asked
Jan 23, 2014
by
sreemathi.v
1
answer
Identify the contrapositive of the statement, If 2 is the only even prime number then 6 is divisible by 3.
jeemain
math
mathematical-reasoning
class11
ch14
medium
implications-(tautology-contradiction.)
q25
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
Global warming can be prevented by
jeemain
chemistry
class11
environmental-chemistry
unit14
q25
easy
asked
Jan 20, 2014
by
sreemathi.v
1
answer
Given the following statement: Some pins are clips. Some clips are pens. Now, consider the claims: C1 :Some pins are pens and C2: No pin is a pen. Now, mark according to the rules - \[\] i) Mark A if C1 is true, ii) Mark B if C2 is true,iii) Mark C if neither C1 nor C2 is true and iv) Mark D if both C1 and C2 are true.
class12
jeemain
math
mathematical-reasoning
unit14
easy
q25
asked
Jan 18, 2014
by
balaji.thirumalai
1
answer
In a binomial distribution the mean is 15 and variance is 10, then parameter $n$ is
jeemain
math
cbse
class12
probability
ch13
bionomial-distribution
difficult
q25
asked
Jan 16, 2014
by
thanvigandhi_1
1
answer
The mean and standard deviation of a binomial variate X are 4 and $ \sqrt 3$ respectively. The $P( X \geq 1 )$ is equal to
jeemain
math
cbse
class12
probability
medium
q25
asked
Jan 16, 2014
by
thanvigandhi_1
1
answer
Which orbital is nearest to the nucleus?
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
bhor's-model
q25
easy
asked
Jan 10, 2014
by
sreemathi.v
1
answer
The density (in $gml^{-1}$) of a 3.60M sulphuric acid solution that is 29% $H_2SO_4$.(Molar mass=98$gmol^{-1}$) by mass will be
sat
chemistry
liquids-solids-and-phase-change
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q25
difficult
asked
Jan 7, 2014
by
sreemathi.v
1
answer
The probability of guessing correctly atleast 8 out of 10 answers on a true - false examination is :
jeemain
math
cbse
class12
probability
bionomial-distribution
easy
q25
asked
Jan 6, 2014
by
thanvigandhi_1
1
answer
If 5, x, y, z, 1280 are in GP, what are the values of x, y, z.
jeemain
math
class11
ch9
sequences-and-series
easy
geometric-progression
q25
asked
Jan 2, 2014
by
yamini.v
1
answer
The equation of the plane passing through the point $(3,2,0) $ and the line $\large\frac{x-3}{1}=\frac{y-6}{5}=\frac{z-4}{4}$ is ?
jeemain
math
class12
ch11
3d-geometry
equations-of-planes
medium
q25
asked
Dec 28, 2013
by
rvidyagovindarajan_1
1
answer
The graph between stopping potential vs frequency is given for two different metals, then choose most appropriate statement
jeemain
physics
dual-nature-matter-radiation
cbse
class12
medium
q25
asked
Dec 27, 2013
by
thanvigandhi_1
1
answer
Let $f$ be differentiable for all $x$. If $f(1)=-2$ and $f'(x)\geq 2$ for $x\in [1,6]$ then
jeemain
math
class12
unit8
continuity-and-differentiability
easy
q25
asked
Dec 23, 2013
by
sreemathi.v
1
answer
The energy required to charge a parallel plate condenser of plate separation d and plate area of cross - section A such that the uniform electric field betwen the plates is E, is :
aipmt
modelpaper
physics
2008
q25
asked
Dec 15, 2013
by
thanvigandhi_1
1
answer
$I_1= \int \limits _0^{\pi} x \log \sin x dx;\; I_2=\int \limits_0^{\pi} \log \sin x dx . $ find $\large\frac{I_1}{I_2}$=?
jeemain
math
class12
ch7
integral-calculus
integration-by-subsitution
easy
q25
asked
Dec 13, 2013
by
meena.p
1
answer
The potential of hydrogen electrode at $25^{\circ} C$ will be:$(PH_2 =1\; atm, concentration\; of\; H^{+} = 0.1M)$
jeemain
chemistry
unit8
redox-reactions-and-electrochemistry
q25
medium
asked
Dec 11, 2013
by
sreemathi.v
1
answer
The structure of $N(CH_3)_3$ and $N(SiH_3)_3$ are respectively
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
molecular-orbital-theory
q25
medium
asked
Dec 9, 2013
by
sreemathi.v
1
answer
Which of the following is needed both in photosynthesis and respiration ?
jeemain
eamcet
biology
2002
q25
asked
Dec 8, 2013
by
thanvigandhi_1
0
answers
Refer to the below reaction :
jeemain
chemistry
unit21
organic-chemistry
q25
difficult
basic-organic-chemistry
class11
ch12
asked
Dec 5, 2013
by
sreemathi.v
1
answer
Arrange in the decresing order of reactivity with HOCl
jeemain
chemistry
unit21
organic-chemistry
q25
medium
basic-organic-chemistry
class11
ch12
asked
Dec 3, 2013
by
sreemathi.v
1
answer
The peroxisomal enzyme which catalyzes the conversion of glycolate belongs to this category
jeemain
eamcet
biology
2001
q25
asked
Dec 1, 2013
by
thanvigandhi_1
0
answers
$2NaOH+2F_2\rightarrow 2NaF+x+y$.$x$ & $y$ are
jeemain
chemistry
unit15
p-block-elements
q25
easy
asked
Nov 27, 2013
by
sreemathi.v
1
answer
If $\Delta=\begin{vmatrix}x^n&x^{n+2}&x^{2n}\\1&x^p&p\\x^{n+5}&x^{p+6}&x^{2n+5}\end{vmatrix}=0$ then $p$ is given by
jeemain
math
class12
ch4
determinants
q25
properties-of-determinants
difficult
asked
Nov 26, 2013
by
sreemathi.v
1
answer
Wareing and his co-workers were associated with the discovery of :
jeemain
eamcet
biology
2000
q25
asked
Nov 24, 2013
by
thanvigandhi_1
0
answers
LRG 30 is an important variety of the following crop plant grown in Andhra Pradesh
jeemain
eamcet
biology
1999
q25
asked
Nov 22, 2013
by
thanvigandhi_1
0
answers
If $A(\theta)=\begin{bmatrix}1&\tan\theta\\-\tan\theta&1\end{bmatrix}$ and $AB=I$ then $(\sec^2\theta)B$ is equal to
jeemain
math
class12
ch4
determinants
q25
adjoint-and-inverse
medium
asked
Nov 22, 2013
by
sreemathi.v
1
answer
If $A=\begin{vmatrix}\alpha &0\\1 &1\end{vmatrix}$ and $B=\begin{vmatrix}1 &0\\5 &1\end{vmatrix}$then the value of $\alpha$ for which $A^2=B$ is
jeemain
math
ch3
class12
matrices
q25
operations-on-matrices
easy
asked
Nov 20, 2013
by
sreemathi.v
1
answer
Two sides of a $\Delta$le are given by the roots of the equation $x^2-2\sqrt 3x+2=0$,The angle between the sides is $\large\frac{\pi}{3}$.The perimeter of the triangle is
jeemain
math
class11
ch3
trigonometric-functions
q25
trignometric-equations
difficult
asked
Nov 18, 2013
by
sreemathi.v
1
answer
$ Solute + H_2O \rightleftharpoons solution; \Delta H=\pm x $ For the given equation, Solubility(S) of a solute in the solvent (say $H_2O$) is given by $S = A e^{-\frac{\Delta H}{RT}}$ For a given solution, variation of log S with temperature is shown graphically. Hence, Solute is:
jeemain
aipmt
chemistry
equilibrium
medium
q25
biology
asked
Nov 15, 2013
by
mosymeow_1
1
answer
If $ \large\frac{\tan 3A}{\tan A}$$=a$ then $\large\frac{\sin 3A}{\sin A}$ is equal to :
jeemain
eamcet
math
2005
q25
asked
Nov 12, 2013
by
meena.p
1
answer
Study the following combinations and identify correct matches :
eamcet
jeemain
biology
2010
q25
asked
Nov 11, 2013
by
thanvigandhi_1
0
answers
What is the quantity of electricity (in Coulombs) required to deposit all the silver from 250 mL of 1 M $AgNO_3$ solution ?
jeemain
eamcet
chemistry
2005
q25
asked
Nov 11, 2013
by
meena.p
1
answer
Fraunhofer lines are produced by the absorption of light in :
jeemain
eamcet
physics
2005
q25
asked
Nov 7, 2013
by
meena.p
0
answers
The set of all possible values of $'c'$ for which $\overrightarrow a=c \log_3 x\hat i-6\hat j+3\hat k$ and $\overrightarrow b=\log_3x\hat i+2\hat j+2c\log_3x\hat k$ making acute angle for $\forall x\in (0,\infty)$ is ?
jeemain
math
class12
ch10
vector-algebra
difficult
vector-product
q25
asked
Nov 6, 2013
by
rvidyagovindarajan_1
1
answer
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