Recent questions tagged q14

A box contains 3 white and 2 red balls. If we draw one ball and without replacing the first ball, the probability of drawing red ball in the second draw is

asked Jan 8, 2014 by thanvigandhi_1

1 answer

A mixture of ethane $(C_2H_6)$ and ethene $(C_2H_4)$ occupies 40 litre at 1.00atm and at 400k.The mixture reacts completely with 130g of $O_2$ to produce $CO_2$ and $H_2O$.Assuming ideal gas behavior ,Calculate the mole fractions of $C_2H_4$ and $C_2H_6$ in the mixture.

asked Jan 6, 2014 by sreemathi.v

1 answer

An unbiased die is rolled four times. Out of four face values obtained, the probability that the minimum face is not less than 2 and the maximum face is not greater than 5 is

asked Jan 2, 2014 by thanvigandhi_1

1 answer

In a GP, the ratio of the sum of first 3 terms to the sum of first 6 terms is 125/152. Find the common of the GP.

asked Dec 31, 2013 by yamini.v

1 answer

The length of the perpendicular drawn from the point $(3,-1,11) $ on the line $\large\frac{x}{2}=\frac{y-2}{3}=\frac{z-3}{4}$ is?

asked Dec 27, 2013 by rvidyagovindarajan_1

1 answer

The equation of the plane passing through the line of intersection of the planes $x+2y+3z-2=0\:\:and\:\:x-y+z-3=0$ and which is at a distance of $\large\frac{2}{\sqrt 3}$ units from $(3,1,-1)$. is ?

asked Dec 26, 2013 by rvidyagovindarajan_1

1 answer

Let $f:R\rightarrow R$ be a function defined by $f(x)=max(x,x^3)$.The set of all points where $f(x)$ is not differentiable

asked Dec 20, 2013 by sreemathi.v

1 answer

If Q E and W denote respectively the heat added, change in internal energy and the work done in a closed cycle process, then :

asked Dec 15, 2013 by thanvigandhi_1

0 answers

Integrate: $\int \limits_{1/e}^e | \log_e x| dx $

asked Dec 12, 2013 by meena.p

1 answer

What is the direction of current in following galvanic cell?

asked Dec 10, 2013 by sreemathi.v

1 answer

Among the following the maximum covalent character is shown by the compound

asked Dec 9, 2013 by sreemathi.v

1 answer

Genetic recombination by transduction in bacteria was discovered first in this

asked Dec 6, 2013 by thanvigandhi_1

0 answers

The bond order of $[He_2]^{4-}$ is

asked Dec 6, 2013 by sreemathi.v

1 answer

Refer to the below reaction :

asked Dec 4, 2013 by sreemathi.v

1 answer

Examine the following reaction

asked Dec 3, 2013 by sreemathi.v

1 answer

Oxytetracycline is obtained from

asked Dec 1, 2013 by thanvigandhi_1

0 answers

Borax formulate :

asked Nov 26, 2013 by sreemathi.v

1 answer

If $A=\begin{bmatrix}3&4\\2&4\end{bmatrix},B=\begin{bmatrix}-2&-2\\0&-2\end{bmatrix}$ then $(A+B)^{-1}$ is equal to

asked Nov 25, 2013 by sreemathi.v

1 answer

Emasculation means :

asked Nov 24, 2013 by thanvigandhi_1

0 answers

Asafoetida is a

asked Nov 22, 2013 by thanvigandhi_1

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If $A=\begin{bmatrix}1&2&2\\2&1&2\\2&2&1\end{bmatrix}$ then $A^2-4A$ is equal to

asked Nov 22, 2013 by sreemathi.v

1 answer

The value of the determinant $\begin{vmatrix}1 &a&a^2-bc\\1&b&b^2-ca\\1 &c&c^2-ab\end{vmatrix}$ is

asked Nov 20, 2013 by sreemathi.v

1 answer

what would be the expression in place of ? in the Van't Hoff equation: $ log \frac{K_2}{K_1} = \frac {\Delta H^\circ}{2.303R} [?]$

asked Nov 15, 2013 by mosymeow_1

1 answer

Water in a river 20 m deep is flowing at a speed of $10\;ms^{-1}$. The shearing stress between the horizontal layers of water in the river in $Nm^{-2}$ is : (Coefficient of viscosity of water $=10^{-3}SI$ units)

asked Nov 13, 2013 by meena.p

0 answers

If x is real, then the minimum value of $\large\frac{x^2-x+1}{x^2+x+1}$, is :

asked Nov 11, 2013 by meena.p

1 answer

Which one of the following statements related to plant structure are true ?

asked Nov 10, 2013 by thanvigandhi_1

0 answers

3-hydroxybutanal is formed when (X) reacts with (Y) in dilute (Z) solution. What are X,Y and Z?

asked Nov 8, 2013 by meena.p

0 answers

The heat evolved for the rise of water when one end of the capillary tube of radius r is immersed vertically into water is : (Assume surface tension=T and density of water to be p)

asked Nov 7, 2013 by meena.p

1 answer

If $\sqrt {9x^2+6x+1} < (2-x) ,$ then :

asked Nov 5, 2013 by meena.p

1 answer

$(\overrightarrow a+\overrightarrow b+\overrightarrow c).[(\overrightarrow a+\overrightarrow b)\times (\overrightarrow a+\overrightarrow c)]=?$

asked Nov 1, 2013 by rvidyagovindarajan_1

1 answer

The disperse phase, dispersion medium and nature of colloidal solution (lyophilic or lyophobic) of 'gold sol' respectively are :

asked Oct 30, 2013 by meena.p

1 answer

Two soap bubbles combine to form a single bubble. In this process, the change in volume and surface area are respectively V and A. If P is the atmospheric pressure, and T is the surface tension of the soap solution, the following relation is true.

asked Oct 29, 2013 by meena.p

1 answer

Consider the following reaction: $2NH_3(g)+CO_2(g)\rightarrow (NH_2)_2CO(aq)+H_2O(l)$. If $637.2\;g$ $NH_3$ and $1142\;g$ $CO_2$ are allowed to react, then which one is the limiting reagent ?

asked Oct 28, 2013 by sreemathi.v

1 answer

If $\alpha$ and $\beta$ are the roots of the equation $ax^2+bx+c=0$ and , if $px^2+qx+r=0$ has roots $\large\frac{1- \alpha}{\alpha}$ and $\large\frac{1-\beta}{\beta}$, then r is equal to

asked Oct 24, 2013 by meena.p

1 answer

The decreasing order of bond dissociation energies of C - C, C -H and H -H bound is

asked Oct 23, 2013 by meena.p

1 answer

A chloride of an element contains 49.5% chlorine.The specific heat of the element is $0.056$.Calcuate the equivalent mass,valency.

asked Oct 23, 2013 by sreemathi.v

1 answer

The liquid does not wet the solid surface if the angle of contact is

asked Oct 22, 2013 by meena.p

1 answer

If $A+B+C=\pi$ then $\sin 2A+\sin 2B-\sin 2C$ is equal to

asked Oct 18, 2013 by sreemathi.v

1 answer

Let $\alpha$ and $\beta$ be the roots of the quadratic equation $ax^2+bx+c=0$. Observe the lists given below:

asked Oct 16, 2013 by meena.p

1 answer

Identify the correct statements

asked Oct 16, 2013 by thanvigandhi_1

0 answers

Find the value of $\sin 67\large\frac{1}{2}^{\large\circ}$ & $\cos 67\large\frac{1}{2}^{\large\circ}$

asked Oct 14, 2013 by sreemathi.v

1 answer

If $f(x) =2x^4-13 x^2+ax+b$ is divisible by $x^2-3x+2$, then $(a,b) = $

asked Oct 9, 2013 by meena.p

2 answers

The maximum value of $\sin(\cos x)$ is equal to

asked Oct 7, 2013 by sreemathi.v

1 answer

A steel wire $1.5\;m$ long and radius $1\;mm$ is attached with a load of $3 \;Kg$ at one end and the other end of he wire is fixed. It is wirled in a vertical circle with frequency $2\;Hz$. find the elongation of the wire when the weight is at the lowest position. $[Y=2 \times 10^{11} N/m^2 \quad g=10m/s^2]$

asked Oct 3, 2013 by meena.p

1 answer

Identify the correct combination of characters found in cucurbita

asked Oct 2, 2013 by thanvigandhi_1

1 answer

Let $\alpha \neq 1$ be a real root of the equation $x^3-ax^2+ax-1=0,$ where $a \neq -1 $ is a real number. Then a root of this equation, among the following, is :

asked Sep 26, 2013 by meena.p

1 answer

The area (in square units) of the region bounded by the curves $x=y^2$ and $x=3-2y^2$ is

asked Sep 20, 2013 by meena.p

1 answer

If $\alpha$ and $\beta$ are the roots of the equation $x^2-2x+4=0,$ then $\alpha^9+\beta ^9=$

asked Sep 14, 2013 by meena.p

1 answer

The remainder obtained when the polynomial $1+x+x^3+x^9+x^{27}+x^{81}+x^{243}$ is divided by $x-1$, is .................. .

asked Sep 13, 2013 by meena.p

1 answer

The value of the integral $\int \sqrt x e^{\sqrt x} dx$ is :

asked Sep 13, 2013 by meena.p

1 answer

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