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Recent questions tagged q30
Questions
The correct order of magnetic moments (spin only values in B.M) among is
jeemain
chemistry
class12
coordination-compounds
unit9
q30
medium
asked
Jan 31, 2014
by
sreemathi.v
1
answer
If $r_1$ and $r_2$ are regression coefficients of $y$ on $x$ and $x$ on $y$ respectively
jeemain
math
cbse
statistics
class11
difficult
variance-and-standard-deviation
q30
asked
Jan 28, 2014
by
thanvigandhi_1
1
answer
Find the current through resistance in the circuit.
jeemain
physics
class12
unit19
ch14
q30
medium
junction-diodes
semiconductor-electronics
asked
Jan 28, 2014
by
meena.p
1
answer
Which of the following has no reaction with water?
jeemain
chemistry
class11
s-block-elements
unit10
q30
easy
asked
Jan 27, 2014
by
sreemathi.v
1
answer
If a student gets marks : English 80, Hindi 70, Mathematics 85, Physics 75 and Chemistry 67 and the weights of subjects are 1,2,1,3,1 respectively then weighted A.M is
jeemain
math
cbse
class11
statistics
medium
measures-of-dispersion-(a.m)
q30
asked
Jan 25, 2014
by
thanvigandhi_1
1
answer
$^{\sim}(p \Rightarrow q)$ is equivalent to
jeemain
math
mathematical-reasoning
class11
ch14
difficult
implications-(tautology-contradiction.)
q30
asked
Jan 24, 2014
by
thanvigandhi_1
1
answer
$O_2^{2-}$ is the symbol of _________ ion.
jeemain
chemistry
class11
hydrogen
unit9
q30
easy
asked
Jan 23, 2014
by
sreemathi.v
1
answer
Given the following statement: All seats are hot. All belts are hot. Now, consider the claims: C1: Some seats are belts. C2: All hot are either seats or belts . 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
q30
asked
Jan 21, 2014
by
thanvigandhi_1
1
answer
Which is a false statement?
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q30
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
The beauty of Tajmahal is getting destroyed due to
jeemain
chemistry
class11
environmental-chemistry
unit14
q30
easy
asked
Jan 20, 2014
by
sreemathi.v
2
answers
The correct ground state electronic configuration of chromium atom is
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
quantum-mechanical-model
q30
easy
asked
Jan 10, 2014
by
sreemathi.v
1
answer
A solution contains 4g of $Na_2CO_3$ and NaCl 250ml.25ml of this solution required 50ml of N/10 HCl for complete neutralization.Calculate % composition of mixture.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
percentage-composition
q30
difficult
asked
Jan 7, 2014
by
sreemathi.v
1
answer
The probability that a non - leap year has 53 sundays is
jeemain
math
cbse
class11
probability
events
easy
q30
asked
Jan 6, 2014
by
thanvigandhi_1
1
answer
If the $ i^{th},j^{th}\; and\; k^{th} $ term of an AP and a GP are equal and are $x,y,z$ find the value of $x^{(y-z)}\;.y^{(z-x)}\;.z^{(x-y)}$
jeemain
math
class11
ch9
sequences-and-series
easy
relationship-between-ap-and-gm
q30
asked
Jan 2, 2014
by
yamini.v
1
answer
Evaluate : $\lim\limits_{h\to 0}\large\frac{(a+h)^2\sin(a+h)-a^2\sin a}{h}$
jeemain
math
class11
ch13
limits and derivatives
derivatives
easy
q30
asked
Dec 23, 2013
by
sreemathi.v
1
answer
In the circuit shown, the current through the 4$ \Omega$ resistor is 1 amp when the points P and M are connected to a d.c voltage source. The potential difference between the points M and and N is :
aipmt
modelpaper
physics
2008
q30
asked
Dec 15, 2013
by
thanvigandhi_1
0
answers
$I_1= \int \limits_{(-2-k)}^{k+3} x f[x (1-x)].dx; \; I_2= \int \limits_{(-2-k)}^{k+3} x f[x (1-x)].dx; \; \large\frac{I_1}{I_2}=?$
jeemain
math
class12
ch7
integral-calculus
integration-by-subsitution
medium
q30
asked
Dec 13, 2013
by
meena.p
1
answer
Arrange $F_2,Cl_2,Br_2,I_2$ in order of increasing SRP
jeemain
chemistry
unit8
redox-reactions-and-electrochemistry
q30
medium
asked
Dec 11, 2013
by
sreemathi.v
1
answer
The more reactivity of Phosphorouspentachloride $(PCl_5)$ is due to
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
valence-bond-theory
q30
medium
asked
Dec 9, 2013
by
sreemathi.v
1
answer
Exposure to light inhibits the process of germination in the seeds of the following plants :
jeemain
eamcet
biology
2002
q30
asked
Dec 8, 2013
by
thanvigandhi_1
0
answers
Which of the following is likely mechanism for the transformation shown below?
jeemain
chemistry
unit21
organic-chemistry
q30
difficult
basic-organic-chemistry
class11
ch12
asked
Dec 5, 2013
by
sreemathi.v
1
answer
Identify the product
jeemain
chemistry
unit21
organic-chemistry
q30
medium
basic-organic-chemistry
class11
ch12
asked
Dec 4, 2013
by
sreemathi.v
1
answer
Identify the plant in which 'night break' is inhibitory to floral induction :
jeemain
eamcet
biology
2001
q30
asked
Dec 1, 2013
by
thanvigandhi_1
0
answers
Oxydazation states of oxygen are :
jeemain
chemistry
unit15
p-block-elements
q30
easy
asked
Nov 27, 2013
by
sreemathi.v
1
answer
One of the following is involved in denitrification reactions :
jeemain
eamcet
biology
2000
q30
asked
Nov 25, 2013
by
thanvigandhi_1
0
answers
Protoxylem in Selaginella stem is
jeemain
eamcet
biology
1999
q30
asked
Nov 23, 2013
by
thanvigandhi_1
0
answers
If $P$ is a $3\times 3$ matrix such that $P^T=2P+1$ where $P^T$ is the transpose of $p$ and $I$ is the $3\times 3$ identity matrix then there exists a column matrix $x=\begin{bmatrix}x\\y\\z\end{bmatrix}\neq \begin{bmatrix}0\\0\\0\end{bmatrix}$ such that
jeemain
math
ch3
class12
matrices
q30
transpose-of-a-matrix
easy
asked
Nov 20, 2013
by
sreemathi.v
1
answer
The number of all possible values of $\theta$ where $0 < \theta < \pi$ for which the system of equations $(y+z)\cos 3\theta=(xyz)\sin 3\theta$,$x\sin 3\theta=\large\frac{2\cos 3\theta}{y}+\frac{2\sin 3\theta}{z}$,$(xyz)\sin 3\theta=(y+2z)\cos 3\theta+y\sin 3\theta$ have a solution $(x_0,y_0,z_0)$ with $y_0,z_0\neq 0$ is
jeemain
math
class11
ch3
trigonometric-functions
q30
trignometric-equations
difficult
asked
Nov 18, 2013
by
sreemathi.v
1
answer
For the equilibrium $2SO_2 + O_2 \rightleftharpoons 2SO_3$ we start with 2 moles of $SO_2$ and 1 mole of $O_2$ at 3 atm. When equilibrium is attained, pressure changes to 2.5 atm. Hence, $K_p$ is:
jeemain
aipmt
chemistry
equilibrium
difficult
q30
biology
asked
Nov 15, 2013
by
mosymeow_1
1
answer
$2 \tan h^{-1} \large\frac{1}{2}$ is equal to :
jeemain
eamcet
math
2005
q30
asked
Nov 12, 2013
by
meena.p
1
answer
The carbon ratio of lutein, abscisic acid and $ GA_{27}$ is :
jeemain
eamcet
biology
2010
q30
asked
Nov 11, 2013
by
thanvigandhi_1
0
answers
At $550 K,$ the $K_c$ for the following reaction is $10^{4}\;mol^{-1}\;L$
jeemain
eamcet
chemistry
2005
q30
asked
Nov 11, 2013
by
meena.p
0
answers
If $\overrightarrow a,\overrightarrow b\:and\:\overrightarrow c$ are non zero vectors that are pair wise non-collinear and if $\overrightarrow a+3\overrightarrow b$ is collinear with $ \overrightarrow c$ and $\overrightarrow b+2\overrightarrow c $ is collinear with $\overrightarrow a$, then $\overrightarrow a+3\overrightarrow b+6\overrightarrow c=?$
jeemain
math
class12
ch10
vector-algebra
medium
addition-of-vectors
q30
asked
Nov 9, 2013
by
rvidyagovindarajan_1
1
answer
If $|\overrightarrow a+\overrightarrow b|=\sqrt {29}$ and $\overrightarrow a\times (2\hat i+3\hat j+4\hat k)=(2\hat i+3\hat j+4\hat k)\times \overrightarrow b,$ then $(\overrightarrow a+\overrightarrow b).(-7\hat i+2\hat j+3\hat k)=?$
jeemain
math
class12
ch10
vector-algebra
medium
addition-of-vectors
q30
asked
Nov 9, 2013
by
rvidyagovindarajan_1
1
answer
Two charges 2 C and 6C are separated by a finite distance. If a charge of $-4C$ is added to each of them, the initial force of $12 \times 10^3\;N$ will change to :
jeemain
eamcet
physics
2005
q30
asked
Nov 7, 2013
by
meena.p
1
answer
If, in a $\Delta \; ABC, \tan \large\frac{A}{2}=\frac{5}{6}$ and $\tan \large\frac{C}{2}=\frac{2}{5},$ then $a,b,c$ are such that:
jeemain
eamcet
math
2006
q30
asked
Nov 6, 2013
by
meena.p
1
answer
What volume of 0.20M $H_2SO_4$ is required to produce 34.0g of $H_2S$ by the reaction: $8KI+5H_2SO_4\rightarrow 4K_2SO_4+4I_2+H_2S+4H_2O$
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q30
easy
asked
Oct 31, 2013
by
sreemathi.v
1
answer
Which of the following compounds when heated with $CO$ at $150^{\circ}C$ and 500 atm pressure in presence of $BF_3$ forms ethyl propionate?
jeemain
eamcet
chemistry
2006
q30
asked
Oct 30, 2013
by
meena.p
1
answer
Along the X-axis, three charges $\large\frac{q}{2},-q$ and $\large\frac{q}{2}$ are placed at $x=0,x= a$ and $x=2a$ respectively. The resultant electric potential at $x=a+r$ if ( a << r) is : $( \varepsilon_0$ is the permittivity of free space)
jeemain
eamcet
physics
2006
q30
asked
Oct 29, 2013
by
meena.p
1
answer
Identify two correct statements from the following :
jeemain
eamcet
biology
2011
q30
asked
Oct 27, 2013
by
thanvigandhi_1
1
answer
$\sec\;h^{-1} (\sin \theta)$ is equal to
jeemain
eamcet
math
2007
q30
asked
Oct 24, 2013
by
meena.p
0
answers
An organic compound containing C and it has 92.3% carbon .Its empirical formula is :
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
percentage-composition
q30
medium
asked
Oct 24, 2013
by
sreemathi.v
2
answers
Calculate the emf of the cell $ Cu(s)|Cu^{2+} (aq)| |Ag^{+}(aq)| Ag(s) $ Given $E^{\circ}_{Cu^{2+}/Cu} =+0.34 \;V, E^{\circ}_{Ag^{+}/Ag}=0.80\;V$
jeemain
eamcet
chemistry
2007
q30
asked
Oct 24, 2013
by
meena.p
1
answer
Two unit negative charges are placed on a straight line. A positive charge q is placed exactly at the mid point between these unit charges. If the system of these three charges is in equilibrium, the value of (q in C) is
jeemain
eamcet
physics
2007
q30
asked
Oct 23, 2013
by
meena.p
1
answer
$\large\frac{1+ \tan h \Large\frac{x}{2}}{1- \tan h \Large\frac{x}{2}}=$
jeemain
eamcet
math
2008
q30
asked
Oct 17, 2013
by
meena.p
1
answer
If the number of stomata is 30 and the epidermal cell are 120 per unit area of a leaf, then the stomatal index is
jeemain
eamcet
biology
2012
q30
asked
Oct 16, 2013
by
thanvigandhi_1
1
answer
If $p$ and $q$ are +ve real numbers such that $p^2+q^2=1$ then the maximum value of $(p+q)$ is
jeemain
math
class11
ch3
trigonometric-functions
q30
trignometric-equations
medium
asked
Oct 16, 2013
by
sreemathi.v
1
answer
$P$ is a point on the segment joining the feet of two vertical poles of heights $a$ and $b$. The angles of elevation of the tops of the poles from P are $45^{\circ}$ each. Then the square of the distance between the tops of the poles is :
jeemain
eamcet
math
2009
q30
asked
Oct 9, 2013
by
meena.p
1
answer
The value of $\theta(0 \;< \theta\;<360^{\circ})$ satisfying $cosec \;\theta-2=0$ are
jeemain
math
class11
ch3
trigonometric-functions
q30
angles
easy
asked
Oct 8, 2013
by
sreemathi.v
1
answer
A uniform rod of length $2.0 m$ specific $0.5$ and mass$2 \;kg$ is hinged at one end to bottom of tank of water (Specific gravity =1.0) filled upto a height of $1m$. as shown when $\theta \neq 0$. the force exerted by hinge on the rod is $(g=10 \;m/s^2)$
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q30
difficult
asked
Oct 4, 2013
by
meena.p
1
answer
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