Email

Chat with tutors

Login

Ask Questions, Get Answers

X

Questions >> Archives

Archives

Sulphur dioxide and oxygen were allowed to diffuse through a porous partition . $\;20\;dm^{3}\;$ of $\;SO_{2}\;$ diffuses through the porous partition in 60 seconds .The volume of $\;O_{2}\;$ in $\;dm^{3}\;$ which diffuses under the similar condition in 30 seconds will be (atomic mass of sulphur =32 u):

asked May 25, 2014 by yamini.v

1 answer

Zirconium phosphate $\;[Zr_{3}(PO_{4})_{4}]\;$ dissociates into three zirconium cations of charge +4 and four phosphate anions of charge -3 . If molar solubility of zirconium phosphate is denoted by S and its solubility product by $\;K_{sp}\;$ then which of the following relationship between $\;S\;$ and $\;K_{sp}\;$ is correct ?

asked May 25, 2014 by yamini.v

1 answer

Which one of the following molecules is paramagnetic ?

asked May 25, 2014 by yamini.v

1 answer

Choose the correct statement with respect to the vapour pressure of a liquid among the following :

asked May 25, 2014 by yamini.v

0 answers

Ionization of energy of gaseous Na atoms is $\;495.5\;kJmol^{-1}\;$ .The lowest possible frequency of light that ionizes a sodium atom is $\;(h=6.626 \times 10^{-34}\;Js\;N_{A}=6.022 \times 10^{23}\;mol^{-1})\;$

asked May 25, 2014 by yamini.v

0 answers

If the function $\; f(x) = \{ \begin{array} \large\frac{\sqrt{2+cos x}-1}{(\pi-x)^{2}} ,& x \neq \pi \\ k ,& x=\pi \end{array} \;$ is continuous at $\;x=\pi \;$ , then k equals :

asked May 25, 2014 by yamini.v

0 answers

If m is non - zero number and $\;\int \large\frac{x^{5m-1}+2x^{4m-1}}{(x^{2m}+x^{m}+1)^{3}} \normalsize dx= \normalsize f(x)+c\;$ , then $\;\normalsize f(x)\;$ is :

asked May 25, 2014 by yamini.v

0 answers

The contrapositive of the statement " If i am not feeling well , then i will go to the doctor " is :

asked May 25, 2014 by yamini.v

0 answers

The principal value of $\;tan^{-1}(cot \large\frac{43 \pi}{4})\;$ is :

asked May 25, 2014 by yamini.v

0 answers

The function $\;f(x)=|sin 4x|+|cos 2x|\;$ , is a periodic function with period :

asked May 25, 2014 by yamini.v

0 answers

Let $\;\overline{x}\;,M\;$ and $\;\sigma^{2}\;$ be respectively the mean ,mode and variance of n observations $\;x_{1},x_{2},...,x_{n}\;$ and $\;d_{i}=-x_{i}-a\;,i=1,2,...,n\;$ , where a is any number. Statement I : Variance of $\;d_{1},d_{2},..,d_{n}\;$ is $\;\sigma^{2}\;$ Statement II :Mean and mode of $\;d_{1},d_{2},..,d_{n}\;$ are $\;\overline{x}-a\;$ and $\;-M-a\;$ , respectively

asked May 25, 2014 by yamini.v

0 answers

Let A and E be any two events with positive probabilities : Statement I : $\;\normalsize P(\large\frac{E}{A}) \geq \normalsize P(\large\frac{A}{E}) \normalsize P(E)\;$ Statement II : $\;\normalsize P(\large\frac{A}{E}) \geq \normalsize P(A \cap E)\;$ .

asked May 25, 2014 by yamini.v

0 answers

If $\;\overrightarrow{x}=3 \hat{i}-6 \hat{j}-\hat{k}\;, \overrightarrow{y}=\hat{i}+4 \hat{j}-3 \hat{k}\;$ and $\;\overrightarrow{z}=3 \hat{i}-4 \hat{j}-12 \hat{k}\;$ , then the magnitude of the projection of $\;\overrightarrow{x} \times \overrightarrow{y}\;$ on $\;\overrightarrow{z}\;$ is :

asked May 25, 2014 by yamini.v

0 answers

If the angle between the line $\;2(x+1)=y=z+4\;$ and the plane $\;2x-y+\sqrt{\lambda}z+4=0\;$ is $\;\large\frac{\pi}{6}\;$ ,then the value of $\;\lambda\;$ is :

asked May 24, 2014 by yamini.v

0 answers

Equation of the line of the shortest distance between the lines $\;\large\frac{x}{1}=\large\frac{y}{-1}=\large\frac{z}{1}\;$ ans $\;\large\frac{x-1}{0}=\large\frac{y+1}{-2}=\large\frac{z}{i}\;$ is :

asked May 24, 2014 by yamini.v

0 answers

The tangent at an extremely (in the first quadrant) of latus rectum of the hyperbola $\;\large\frac{x^{2}}{4}-\large\frac{y^{2}}{5}=0\;$ , meets x -axis and y -axis at A and B respectively .Then $\;(OA)^{2}-(OB)^{2}\;$ , where O is the origin , equals :

asked May 24, 2014 by yamini.v

0 answers

A chord is drawn through the focus of the parabola $\;y^{2}=6x\;$ such that its distance from the vertex of this parabola is $\;\large\frac{\sqrt{5}}{2}\;$ , then its slope can be :

asked May 24, 2014 by yamini.v

0 answers

The equation of the circle described on the chord $\;3x+y+5=0\;$ of the circle $\;x^{2}+y^{2}=16\;$ as diameter is :

asked May 24, 2014 by yamini.v

0 answers

If a line L is perpendicular to the line $\;5x-y=1\;$ , and the area of the triangle formed by the line L and the coordinate axes is 5 , then the distance of line L from the line $\;x+5y=0\;$ is :

asked May 24, 2014 by yamini.v

0 answers

The circumcentre of a triangle lies at the origin and its centroid is the mid point of the line segment joining the points $\;(a^{2}+1,a^{2}+1)\;$ and $\;(2a ,-2a)\;, a \neq 0\;$ .Then for any a , the orthocentre of this triangle lies on the line :

asked May 24, 2014 by yamini.v

0 answers

If $\;\large\frac{dy}{dx} + y tan x=sin 2x\;$ and $\;y(0)=1\;$ , then $\;y(\pi)\;$ is equal to :

asked May 24, 2014 by yamini.v

0 answers

The area of the region above the x - axis bounded by the curve $\;y=tan x\;,0 \leq x \leq \large\frac{\pi}{2}\;$ and the tangent to the curve at $\;x= \large\frac{\pi}{4}\;$ is :

asked May 24, 2014 by yamini.v

0 answers

Let function F be defined as $\;F(x) =\int \limits_{1}^{x} \large\frac{e^{t}}{t} dt\;$ , x > 0 then the value of the integral $\;\int \limits_{1}^{x} \large\frac{e^{t}}{t+a} dt\;$ , where a > 0 , is :

asked May 24, 2014 by yamini.v

0 answers

If the volume of a spherical ball is increasing at the rate of $\;4 \pi \;cc/sec\;$ , then the rate of increase of its radius (in cm/sec) , when the volume is $\;288 \pi\;cc\;$ , is :

asked May 24, 2014 by yamini.v

0 answers

If non - zero real numbers b and c are such that min f(x) > max g(x) , where $\;f(x)=x^{2}+2bx+2c^{2}\;$ and $\;g(x)=-x^{2}-2cx+b^{2}\;(x \in R)\;$ ;then $\;|\large\frac{c}{b}|\;$ lies in the interval :

asked May 24, 2014 by yamini.v

0 answers

Let $\;f: R \to R\;$ be a function such that $\;|f(x)| \leq x^{2}\;$ , for all $\;x \in R\;$ .Then , at x= 0 , f is :

asked May 24, 2014 by yamini.v

0 answers

Let $\;f(n)=[\large\frac{1}{3} + \large\frac{3n}{100}]n\;$ , where [n] denotes the greatest integer less than or equal to n .Then $\;\sum_{n=1}^{56} f(n)\;$ is equal to :

asked May 24, 2014 by yamini.v

0 answers

The number of terms in an A.P. is even ; the sum of the odd terms in it is 24 and that the even terms is 30 . If the last term exceeds the first term by $\;10 \large\frac{1}{2}\;$ , then the number of terms in the A.P. is :

asked May 24, 2014 by yamini.v

1 answer

The coefficient of $\;x^{1012}\;$ in the expansion of $\;(1+x^{n}+x^{253})^{10}\;$ ,(where $\;n \leq 22\;$ is any positive integer),is :

asked May 24, 2014 by yamini.v

0 answers

Two women and some men participated in a chess tournament in which every participant played two games with each of the other participants .If the number of games that the men played between them - selves exceeds the number of games that the men played with the women by 66 , then the number of men who participated in the tournament lies in the interval :

asked May 24, 2014 by yamini.v

1 answer

If $\;\bigtriangleup_{r}=\begin{vmatrix} r & 2r-1 & 3r-2 \\[0.3em] \large\frac{n}{2} & n-1 & a \\[0.3em] \large\frac{1}{2}n(n-\normalsize 1) & (n-\normalsize 1)^{2} & \large\frac{1}{2} (n-\normalsize 1)(\normalsize 3n-\normalsize 4)\end{vmatrix}\;$ , then the value of $\;\sum_{r=1}^{n-1} \bigtriangleup_{r}\;$ :

asked May 24, 2014 by yamini.v

0 answers

Let A and B be any $\;3 \times 3\;$ matrices . If A is symmetric and B is skewsymmetric , then the matrix AB - BA is :

asked May 24, 2014 by yamini.v

0 answers

The equation $\;\sqrt{3x^{2}+x5}=x-3\;$ , where x is real , has :

asked May 24, 2014 by yamini.v

0 answers

For all complex numbers z of the form $\;1+i \alpha\;, \alpha \in R\;$ , if $\;z^{2}=x+iy\;$ , then :

asked May 24, 2014 by yamini.v

1 answer

Let $\;f: R \to R \;$ be defined by $\;f(x) = \large\frac{|x|-1}{|x|+1}\;$ then f is :

asked May 24, 2014 by yamini.v

0 answers

Interference pattern is absorbed at ' P ' due to superimposition of two rays coming out from a source ' S ' as shown in the figure . The value of ' l ' for which maxima is obtained at ' P ' is : (R is perfect reflecting surface)

asked May 24, 2014 by yamini.v

0 answers

A lamp emits monochromatic green light uniformly in all directions . The lamp is $\;3 \%\;$ efficient in converting electrical power to electromangetic waves and consumes 100 W of power .The amplitude of the electric filed associated with the electromagnetic radiation at a distance of 5 m from the lamp will be nearly :

asked May 24, 2014 by yamini.v

0 answers

A sinusoidal voltage $\;V(t)=100\;sin (500 t)\;$ is applied across a pure inductance of $\;L=0.02 \;H\;$ . The current through the coil is :

asked May 24, 2014 by yamini.v

0 answers

Consider two thin identical conducting wires covered with very thin insulating material . One of the wires is bent into a loop and produces magnetic field $\;B_{1}\;$ , at its center when a current I passes through it .The second wire is bent into a coil with three identical loops adjacent to each other and produces magnetic field $\;B_{2}\;$ at the center of the loops when current $\;\large\frac{I}{3}\;$ passes through it . The ratio $\;B_{1} : B_{2}\;$ is :

asked May 24, 2014 by yamini.v

0 answers

A positive charge ' q ' of mass ' m ' is moving along the $\;+ x\;$ axis .We wish to apply a uniform magnetic field B for time $\;\Delta t\;$ so that the charge reverses its direction crossing the y- axis at a distance d . Then :

asked May 24, 2014 by yamini.v

0 answers

The circuit as shown here has two batteries of 8.0 V and 16.0 V and three resistors $\;3 \Omega,9 \Omega\;$ and $\;9 \Omega\;$ and a capacitor $\;5.0\;\mu F\;$ . How much is the current I in the circuit in steady state ?

asked May 24, 2014 by yamini.v

0 answers

The space between the plates of a parallel plate capacitor is filled with a ' dielectric ' whose dielectric constant varies with distance as for the relation : $\;K(x)=K_{0}+\lambda x\;$ ( $\lambda\;$ )=a constant . The capacitance C , of this capacitor , would be related to its ' vacuum ' capacitance $\;C_{0}\;$ as for the relation :

asked May 24, 2014 by yamini.v

1 answer

A spherically symmetric charge distribution is characterised by a charge density having the following variation : $\;\rho(r)=\rho_{0}(1-\large\frac{r}{R})\;for\;r < \normalsize R\;$ $\;\rho(r) =0 \;\; r \geq R\;$ where r is the distance from the center of the charge distribution and $\;\rho_{0}\;$ is a constant .The electric field at an internal point $(r < R)$ is :

asked May 23, 2014 by yamini.v

1 answer

A source of sound A emitting waves of frequency 1800 Hz is falling towards ground with a terminal speed v .The observer B on the ground directly beneath the source receives waves of frequency 2150 Hz .The source A receives waves , reflected from ground , of frequency nearly : (Speed of sound =343 m/s)

asked May 23, 2014 by yamini.v

0 answers

Which of the following expressions corresponds to simple harmonic motion along a straight line , where x is the displacement and a,b,c are positive constants ?

asked May 23, 2014 by yamini.v

1 answer

At room temperature a diatomic gas is found to have an r.m.s. speed of $\;1930\;ms^{-1}\;$ .The gas is :

asked May 23, 2014 by yamini.v

1 answer

A car not engine absorbs 1000 J of heat energy from a reservoir at $\;127^{0}C\;$ and rejects 600 J of heat energy during each cycle .The efficiency of engine and temperature of sink will be :

asked May 23, 2014 by yamini.v

0 answers

Hot water cools from $\;60^{0}\;$ to $\;50^{0}\;$ in the first 10 minutes and to $\;42^{0}\;$ in the next 10 minutes .The temperature of the surroundings is :

asked May 23, 2014 by yamini.v

0 answers

Two soap bubbles coalesce to form a single bubble . If V is the subsequent change in volume of contained air and S the change in total surface area , T is the surface tension and P atmospheric pressure ,which of the following relation is correct ?

asked May 23, 2014 by yamini.v

1 answer

A cylindrical vessel of cross - section A contains water to a height h.There is a hole in the bottom of radius ' a ' .The time in which it will be emptied is :

asked May 23, 2014 by yamini.v

0 answers

Page:

« prev
1
...
25
26
27
28
29
30
31
...
36
next »

Feedback Terms Facebook Twitter About Us

Your payment for is successful.

...