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Recent questions tagged q28
Questions
The alkaline earth metal that has greatest affinity for nitrogen is
jeemain
chemistry
class11
s-block-elements
unit10
q28
easy
asked
Jan 27, 2014
by
sreemathi.v
1
answer
The mean age of a combined group of men and women is 30 years. If the mean of the age of men and women are respectively 32 and 27, then the percentage of women in the group is
jeemain
math
cbse
class11
statistics
difficult
measures-of-dispersion-(mean)
q28
asked
Jan 26, 2014
by
thanvigandhi_1
1
answer
If A.M of $x_1, x_2....x_n$ is $ \overline x$ then A.M of $ ax_1+b, ax_2+b, ax_3+b...ax_4+b$ is
jeemain
math
cbse
class11
statistics
medium
measures-of-dispersion-(a.m)
q28
asked
Jan 25, 2014
by
thanvigandhi_1
1
answer
For which of the sets of a, is the statement, “The difference between the roots of the equation $x^2+ax+1 = $ is less than $ \sqrt 5”$ true?
jeemain
math
mathematical-reasoning
class11
ch14
difficult
statements
q28
asked
Jan 24, 2014
by
thanvigandhi_1
1
answer
$H_2O_2$ forms prismatic crystals at
jeemain
chemistry
class11
hydrogen
unit9
q28
easy
asked
Jan 23, 2014
by
sreemathi.v
1
answer
Given the following statement: Statements: No shoe is a chappal. Some chappals are sandals. Now, consider the claims: C1: Some sandals are not chappals.. C2: Sandals which are not chappals are shoes. 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.
jeemain
math
mathematical-reasoning
class11
unit14
easy
q28
asked
Jan 21, 2014
by
thanvigandhi_1
1
answer
Which counter example cannot be used to show that the statement, if n is an odd integer then n is prime is false?
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q28
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
Which of the following is primary pollutant?
jeemain
chemistry
class11
environmental-chemistry
unit14
q28
easy
asked
Jan 20, 2014
by
sreemathi.v
1
answer
Which subshell has maximum energy (polyelectronic system)?
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
quantum-mechanical-model
q28
easy
asked
Jan 10, 2014
by
sreemathi.v
1
answer
A sample containing 0.4775g of $(NH_4)_2C_2O_4$ and inert materials was dissolved in water and made strongly alkaline with KOH ,which converted $NH_4^+$ to $NH_3$.The liberated ammonia was distilled into exactly 50.0ml of 0.05035M $H_2SO_4$.The excess $H_2SO_4$ was back titrated with 11.3ml of 0.1214M $NaOH$.Calculate percent of N,percent of $(NH_4)_2C_2O_4$.(Mol.wt of $(NH_4)_2C_2O_4=124.10$ and at .wt.of N=14.0078)
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
percentage-composition
q28
difficult
asked
Jan 7, 2014
by
sreemathi.v
1
answer
A and B are two events such that $ P(A) > 0, P(B) \neq 1$ then $ P( \overline A / \overline B )=$
jeemain
math
cbse
class12
probability
conditional-probability
easy
q28
asked
Jan 6, 2014
by
thanvigandhi_1
1
answer
If the harmonic mean H and geometric mean G of two positive numbers a and b are in ratio 3:5, then a and b are in the ratio
jeemain
math
class11
ch9
sequences-and-series
easy
relationship-between-ap-and-gm
q28
asked
Jan 2, 2014
by
yamini.v
1
answer
Light of wavelength $4000\: A^{\circ}$ and intensity $100 W/m^2$ is incident on a plate of threshold frequency $ 5.5 \times 10^{14}Hz$. The no. of photons incident per $m^2$ per second is
jeemain
physics
dual-nature-matter-radiation
cbse
class12
difficult
q28
asked
Jan 1, 2014
by
thanvigandhi_1
1
answer
The shortest distance between the lines $\large\frac{x-6}{1}=\frac{2-y}{2}=\frac{z-2}{2}$ and $\large\frac{x+4}{3}=\frac{y}{-2}=\frac{1-z}{2}$ is?
jeemain
math
class12
ch11
3d-geometry
intersection-of-lines-and-planes
medium
q28
asked
Dec 29, 2013
by
rvidyagovindarajan_1
1
answer
Let $f : R\rightarrow [0,\infty]$ be such that $\lim\limits_{x\to 5}f(x)$ exists and $\lim\limits_{x\to 5}\large\frac{(f(x))^2-9}{\sqrt{|x-5|}}$ = 0. Then $\lim\limits_{x\to 5}f(x)$ equals
jeemain
math
class11
ch5
limits and derivatives
introductxion to limits
easy
q28
asked
Dec 23, 2013
by
sreemathi.v
1
answer
A cell can be balanced again 110 cm and 100 cm of potentiometer wire, respectively with and without being short circuited through a resistance of 10$\Omega$. Its internal resistance is :
aipmt
modelpaper
physics
2008
q28
asked
Dec 15, 2013
by
thanvigandhi_1
0
answers
Integrate :$\int \limits_6^8 \large\frac{[x^2]}{[x^2-28 x +196]+[x^2]}$$ dx$
jeemain
math
class12
ch7
integral-calculus
integration-using-partial-fractions
easy
q28
asked
Dec 13, 2013
by
meena.p
1
answer
$E_{AgI/Ag/I^-}=$?,$E^o_{Ag^+/Ag}=0.8V,K_{spAg I}=10^{-18}$
jeemain
chemistry
unit8
redox-reactions-and-electrochemistry
q28
medium
asked
Dec 11, 2013
by
sreemathi.v
1
answer
Where is an electron added during change of $NO^+$ to $NO$
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
valence-bond-theory
q28
medium
asked
Dec 9, 2013
by
sreemathi.v
1
answer
When malic acid is the respiratory substance :
jeemain
eamcet
biology
2002
q28
asked
Dec 8, 2013
by
thanvigandhi_1
0
answers
Refer to the below reaction:
jeemain
chemistry
unit21
organic-chemistry
q28
difficult
basic-organic-chemistry
class11
ch12
asked
Dec 5, 2013
by
sreemathi.v
1
answer
Refer to the below reaction :
jeemain
chemistry
unit21
organic-chemistry
q28
medium
basic-organic-chemistry
class11
ch12
asked
Dec 3, 2013
by
sreemathi.v
1
answer
Which of the following codons is not associated with the termination of protein synthesis ?
jeemain
eamcet
biology
2001
q28
asked
Dec 1, 2013
by
thanvigandhi_1
0
answers
$SF_6$ is more reactive than $TeF_6$.The above statement is
jeemain
chemistry
unit15
p-block-elements
q28
easy
asked
Nov 27, 2013
by
sreemathi.v
1
answer
The 4- carbon compound formed during RuBP regeneration reactions of Calvin cycle is :
jeemain
eamcet
biology
2000
q28
asked
Nov 24, 2013
by
thanvigandhi_1
0
answers
Butler extensively studied the following disease
jeemain
eamcet
biology
1999
q28
asked
Nov 23, 2013
by
thanvigandhi_1
0
answers
Let $\omega\neq 1$ be a cube root of unity and $S$ be the set of all non-singular matrices of the form $\begin{vmatrix}1&a&b\\\omega&1&c\\\omega^2&\omega&1\end{vmatrix}$ where each of a,b and c is either $\omega$ or $\omega^2$.Then the number of distinct matrices in the set S is
jeemain
math
ch3
class12
matrices
q28
invertible-matrices
easy
asked
Nov 20, 2013
by
sreemathi.v
1
answer
If $\sin^{-1}\big(x-\large\frac{x^2}{2}+\frac{x^3}{4}-........)$$+\cos^{-1}(x^2-\large\frac{x^4}{2}+\frac{x^6}{4}.......)=\large\frac{\pi}{2}$.For $0<\mid x\mid<\sqrt 2$ then $x$ equals
jeemain
math
class12
inverse-trigonometric-functions
q28
inverse-trigonometric-properties
difficult
asked
Nov 18, 2013
by
sreemathi.v
1
answer
For a very small extent of dissociation of $PCl_5(g) \rightleftharpoons PCl_3(g) + Cl_2(g)$ is a gaseous phase reaction then degree of dissociation, x:
jeemain
aipmt
chemistry
equilibrium
medium
q28
biology
asked
Nov 15, 2013
by
mosymeow_1
1
answer
If $\cos 2x =(\sqrt 2 +1) \bigg(\cos x - \large\frac{1}{\sqrt 2}\bigg), \cos x \neq \large\frac{1}{2}$ then $x \in :$
jeemain
eamcet
math
2005
q28
asked
Nov 12, 2013
by
meena.p
1
answer
The right sequence of carriers which involve in the transport of excess $Na^+$ ions out of the cell in salt resistant plants is :
jeemain
eamcet
biology
2010
q28
asked
Nov 11, 2013
by
thanvigandhi_1
0
answers
Observe the following reaction : $2A +B \longrightarrow C$. The rate of formation of C is $2.2 \times 10^{-3}\;mol \;L^{-1} min ^{-1}.$ What is the value of $-\large\frac {d[A]}{dt}$ (in mol $L^{-1}\; min^{-1}$)?
jeemain
eamcet
chemistry
2005
q28
asked
Nov 11, 2013
by
meena.p
0
answers
The number of distinct real values of $\lambda$ for which the vectors $-\lambda^2\hat i+\hat j+\hat k,\:\hat i-\lambda^2\hat j+\hat k\:and\:\hat i+\hat k-\lambda^2 \hat k$ are coplanar is?
jeemain
math
class12
ch10
vector-algebra
easy
addition-of-vectors
q28
asked
Nov 8, 2013
by
rvidyagovindarajan_1
1
answer
If two identical bar magnets, each of length l, pole strength m, and magnetic moment M are placed perpendicular to each other with their unlike poles in contact, the magnetic moment of the combination is :
jeemain
eamcet
physics
2005
q28
asked
Nov 7, 2013
by
meena.p
1
answer
If $x=\tan 15^{\circ},y=cosec 75^{\circ}$ and $z=4 \sin 18^{\circ}$ then :
jeemain
eamcet
math
2006
q28
asked
Nov 6, 2013
by
meena.p
1
answer
What volume of a solution of hydrochloric acid containing 73g of acid per litre would sufficient for the exact neutralization of sodium hydroxide obtained by allowing 0.46g of metallic sodium to act upon water ?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q28
easy
asked
Oct 31, 2013
by
sreemathi.v
1
answer
What is the correct order of occurrence (% by weight) in air of Ne, Ar and Kr?
jeemain
eamcet
chemistry
2006
q28
asked
Oct 30, 2013
by
meena.p
1
answer
Two short managers AB and CD are in the X-Y plane and are parallel to X-axis and coordinate of their centers respectively are (0,2) and (2,0). Line joining the north- south poles of CD is opposite to that of AB and lies along the positive X-axis. The resultant field induction due to AB and CD at a point P(2,2) is $100 \times 10^{-7}\;T$. When the poles of the magnet CD are reversed, the resultant field induction is $50 \times 10^{-7}T$. The value of magnetic moments of AB and CD (in $AM^2$) are :
jeemain
eamcet
physics
2006
q28
asked
Oct 29, 2013
by
meena.p
1
answer
A student observed 31 Quisqualis plants each with 36 nodes, 15 Hibiscus plants each with 21 nodes and 77 Calotropis plants each with 11 nodes. All these plants contains leaves at every node. What will be the total number of leaves of these three plants put together?
jeemain
eamcet
biology
2011
q28
asked
Oct 26, 2013
by
thanvigandhi_1
1
answer
If $a,b,c$ are in AP. $b-a,c-b$ and a are in GP. then $a:b:c$ is
jeemain
eamcet
math
2007
q28
asked
Oct 24, 2013
by
meena.p
1
answer
An organic compound contains 49.30% carbon,6.84% hydrogen and its vapour density is 73.Molecular formula of compound is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
percentage-composition
q28
medium
asked
Oct 24, 2013
by
sreemathi.v
1
answer
Which of the following is not tetrahedral ?
jeemain
eamcet
chemistry
2007
q28
asked
Oct 24, 2013
by
meena.p
1
answer
A bar magnet of magnetic moment M and moment of inertia I is freely suspended such that the magnetic axial line in the direction of magnetic meridian. If the magnet is displaced by a very small angle ($ \theta$), the angular acceleration is (Magnetic induction of earth's horizontal field$=B_H$)
jeemain
eamcet
physics
2007
q28
asked
Oct 23, 2013
by
meena.p
1
answer
$\{ x \in \Re : \cos 2x+ 2 \cos ^2 x =2 \}=$
jeemain
eamcet
math
2008
q28
asked
Oct 17, 2013
by
meena.p
1
answer
Identify the wrong statement
jeemain
eamcet
biology
2012
q28
asked
Oct 16, 2013
by
thanvigandhi_1
1
answer
Find $\tan 75^{\large\circ}+\cot 75^{\large\circ}$
jeemain
math
class11
ch3
trigonometric-functions
q28
angles
medium
asked
Oct 15, 2013
by
sreemathi.v
1
answer
In any $\Delta ABC,a(b \cos C-c \cos B)=$
jeemain
eamcet
math
2009
q28
asked
Oct 9, 2013
by
meena.p
0
answers
If $\sin x+\sin^2x=1$ then $\cos^8x+2\cos^6x+\cos^4x$ is equal to
jeemain
math
class11
ch3
trigonometric-functions
q28
trigonometric-identities
easy
asked
Oct 8, 2013
by
sreemathi.v
1
answer
In a baro meter as shown in the figure a small hole is made at a point S Density of mercury is $\rho$. The mercury comes out from this hole with speed v equal to
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q28
medium
asked
Oct 4, 2013
by
meena.p
1
answer
Identify the role of lectins in the formation of root nodules in legumes.
jeemain
eamcet
biology
2013
q28
asked
Oct 3, 2013
by
thanvigandhi_1
1
answer
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