Recent questions tagged q15

Let A and B be two independent events such that $P(A) = \large\frac{1}{5} \: P( A \cup B ) = \large\frac{7}{10}$. Ten $ P(\overline B)$ is equal to

asked Jan 8, 2014 by thanvigandhi_1

1 answer

1.20g sample of $Na_2CO_3$ and $K_2CO_3$ was dissolved in water to form 100ml of a solution.20ml of this solution required 40ml of 0.1N HCl for complete neutralization.Calculate the weight of $Na_2CO_3$ in mixture. If another 20 ml of this solution is treated with excess of $BaCl_2$,what will be the weight of precipitate?

asked Jan 6, 2014 by sreemathi.v

1 answer

If two events A and B $ P( A \cup B ) = 0.5\: and \: P(A \cap B ) = 0.4$ then $ P(A')+P(B')=$

asked Jan 2, 2014 by thanvigandhi_1

1 answer

Find the sum of series 4 + 44 + 444 + 4444 +------upto n terms.

asked Dec 31, 2013 by yamini.v

1 answer

If the distance of the point $P(1,-2,1)$ from the plane $x+2y-2z=a$, where $a>0,$ is $5$, then the foot of the $\perp$ from $P$ to this plane is ?

asked Dec 27, 2013 by rvidyagovindarajan_1

1 answer

If $(x)$ is differentiable and strictly increasing function then the value of $\lim\limits_{x\to 0}\large\frac{f(x^2)-f(x)}{f(x)-f(0)}$ is

asked Dec 20, 2013 by sreemathi.v

1 answer

On a new scale of temperature ( which is linear ) and called the W scale the freezing and boiling points of water are $ 39^{\circ}W \: and \: 239^{\circ} W$ respectively. What will be the temperature on the new scale, corresponding to a temperature of $39^{\circ}$C on the Celcius scale ?

asked Dec 15, 2013 by thanvigandhi_1

0 answers

Integrate : $ \int \limits _{-1}^5 \large\frac{|x|}{x}$$dx$

asked Dec 12, 2013 by meena.p

1 answer

Which of the following relation is correct?

asked Dec 10, 2013 by sreemathi.v

1 answer

Which of the following molecule is expected to exhibit the diamagnetic behavior?

asked Dec 9, 2013 by sreemathi.v

1 answer

The viruses with nucleic acid but without protein coat are known as :

asked Dec 6, 2013 by thanvigandhi_1

0 answers

Which one of the following oxides is expected to exhibit paramagnetic behavior?

asked Dec 6, 2013 by sreemathi.v

1 answer

Refer to the below reaction :

asked Dec 4, 2013 by sreemathi.v

1 answer

Rank the alkenes given below in terms of their relative stability starting with the most stable?

asked Dec 3, 2013 by sreemathi.v

1 answer

The virus which causes ring spot disease in cherry is transmitted through

asked Dec 1, 2013 by thanvigandhi_1

1 answer

DiBorane hybridazition is

asked Nov 26, 2013 by sreemathi.v

1 answer

If $A,B$ and $C$ are the angles of a $\Delta$le then $\begin{vmatrix}\sin 2A&\sin C&\sin B\\\sin C&\sin 2B&\sin A\\\sin B&\sin A&\sin 2C\end{vmatrix}$ = $\lambda\sin A\sin B\sin C$, then $\lambda$ is

asked Nov 25, 2013 by sreemathi.v

1 answer

The maize varieties. Dixie.11.22 where introduces into India from this country :

asked Nov 24, 2013 by thanvigandhi_1

0 answers

The haploid chromosome number in Saccharum officinale is as many times greater in the following as that of Zeamays

asked Nov 22, 2013 by thanvigandhi_1

0 answers

If $A=\begin{bmatrix}1&-2\\4&5\end{bmatrix}$ and $f(1)=t^2-3t+7$ then $f(A)+\begin{bmatrix}3&6\\-12&-9\end{bmatrix}$ is equal to

asked Nov 22, 2013 by sreemathi.v

1 answer

Consider the set A of all determinants of order 3 with entries 0 or 1 only.Let B be the subset of A consisting of all determinants with value 1.Let C be the subset of A consisting of all determinants with value -1.Then

asked Nov 20, 2013 by sreemathi.v

1 answer

What are the units of Equilibrium equations $K_p$ and $K_c$ when $\Delta n_g < 0$ respectively ?

asked Nov 15, 2013 by mosymeow_1

1 answer

There are two holes one each along the opposite sides of a wide rectangular tank. The cross- section of each hole is $0.01m^2$ and the vertical distance between the holes is one meter. The tank is filled with water the net force on the tank in newton when the water flows out of the holes is : (Density of water $=1000\;kg/m^3)$

asked Nov 13, 2013 by meena.p

1 answer

$E_1: a+b+c=0$, if 1 is a root of $ax^2+bx+c=0$ .$E_2:b^2-a^2=2ac,$ if $\sin \theta, \cos \theta$ are the roots of $ax^2+bx+c=0$ Which of the following is true?

asked Nov 11, 2013 by meena.p

1 answer

Identify the plant in which the tangential walls of collocytes are excessively thickened but radial walls are thin :

asked Nov 10, 2013 by thanvigandhi_1

0 answers

Identify the correct order in which the covalent radius of the following elements increases:

asked Nov 8, 2013 by meena.p

0 answers

An iron sphere of mass $20 \times 10^{-3}\;kg$ falls through a viscous liquid with terminal velocity $0.5\;ms^{-1}.$ The terminal velocity $(in\; ms^{-1})$ of another iron sphere of mass $54 \times 10^{-2}\;kg$ is :

asked Nov 7, 2013 by meena.p

1 answer

The difference between two roots of the equation $x^3-13x^2+15x+189=0$ is 2. Then the roots of the equation are :

asked Nov 5, 2013 by meena.p

1 answer

If $\overrightarrow a\:\:and\:\:\overrightarrow b$ are unit vectors and $\theta$ is angle between them then $\large\frac{1}{2}$$|\overrightarrow a-\overrightarrow b|$=?

asked Nov 1, 2013 by rvidyagovindarajan_1

1 answer

Electronlysis of X gives Y at anode. Vacuum distillation of Y gives $H_2O_2$. The number of peroxy (O-O) bonds present in X and Y respectively are :

asked Oct 30, 2013 by meena.p

1 answer

An air bubble of radius 1 cm rises from the bottom portion through a liquid of density $1.5 g/cc$ at a constant speed of $0.250 \;cm^{-1}$.If the density of air is neglected, the coefficient of viscosity of the liquid is approximately, (In pas):

asked Oct 29, 2013 by meena.p

1 answer

The molality of 1M solution of NaCl (specific gravity $1.0585g/ml$) is :

asked Oct 28, 2013 by sreemathi.v

1 answer

Study the following lists

asked Oct 26, 2013 by thanvigandhi_1

1 answer

The set of values of x for which the inequalities $x^2-3x-10 < 0, 10 x - x^2 -16 >0 $ hold simultaneously, is

asked Oct 24, 2013 by meena.p

1 answer

138 g of ethyl alcohol is mixed with 72 g of water. The ratio of mole fraction of alcohol to water is

asked Oct 23, 2013 by meena.p

1 answer

On dissolving 2.0g of metal in sulphuric acid 4.51g of the metal sulphate was formed.The specific heat of the metal is 0.057cal/g.What is the exact atomic mass of the metal?

asked Oct 23, 2013 by sreemathi.v

1 answer

A horizontal pipe of non-uniform cross- section allows water to flow through it with a velocity $1\; ms^{-1}$ when pressure is $50\;kPa$ at a point. If the velocity of flow has to be $2 ms^{-1}$ at some other point the pressure at that point should be

asked Oct 22, 2013 by meena.p

1 answer

The value of $\sum\limits_{n=1}^{\infty}\large\frac{\tan\bigg(\Large\frac{\theta}{2^n}\bigg)}{2^{n-1}\cos\bigg(\Large\frac{\theta}{2^{n-1}}\bigg)}$ is equal to

asked Oct 18, 2013 by sreemathi.v

1 answer

If $ \alpha+\beta=-2$ and $\alpha^3+\beta^3=-56$, then the quadratic equation whose roots are $\alpha$ and $\beta$ is

asked Oct 16, 2013 by meena.p

1 answer

A student observed four plants (A, B, C, D). The number of stamens in a flower of 'A' is equal to those of a flower of 'B' . Out of the ten stamens arranged in two bundles in a flower of 'C', the stamen number in the bundle which possesses most of the stamens is three times to that of inner whorl of a flower of 'A'. In 'D' , the number of stamens is equal to those present in the inner whorl of plant 'B'. Identify A,B,C and D plants respectively.

asked Oct 16, 2013 by thanvigandhi_1

1 answer

$\large\frac{\tan 3x}{\tan x}$ lies between

asked Oct 14, 2013 by sreemathi.v

1 answer

Let A and B be two symmetric matrices of same order. Then the matrix $AB-BA$ is :

asked Oct 9, 2013 by meena.p

1 answer

If $\alpha+\beta+\gamma=\pi$ then the value of $\sin^2\alpha+\sin^2\beta-\sin^2\gamma$ is equal to

asked Oct 7, 2013 by sreemathi.v

1 answer

Velocity of the liquid coming out of a small hole of u vessel containing two different liquids of density $2 \rho$ ans $\rho$ as shown is

asked Oct 3, 2013 by meena.p

1 answer

There are 25 flowers in an inflorescence of Allium. Each anther lobe of every stamen contains 60 pollen grains. What is the total number of pollen grains produced in its inflorescence?

asked Oct 2, 2013 by thanvigandhi_1

1 answer

$f(x)=\begin {vmatrix} 2 \cos x & 1 & 0 \\ x-\frac{\pi}{2} & 2 \cos x & 1 \\ 0 & 1 & 2 \cos x \end {vmatrix}=>f'(\pi)=$

asked Sep 26, 2013 by meena.p

1 answer

If $I_n=\int \limits _0^{\pi/4} \tan ^n \theta d \theta$ for $n=1,2,3........$ then $I_{n-1}+I_{n+1}=.............$

asked Sep 20, 2013 by meena.p

1 answer

If $A=\begin{bmatrix} -8 & 5 \\ 2 & 4 \end{bmatrix}$ satisfies the equation $x^2+4x-p=0,$ then $p=$

asked Sep 14, 2013 by meena.p

1 answer

The length of portion of tangent at any point on the curve $x^{\Large\frac{2}{3}}$$+y^{\Large\frac{2}{3}}$$=a^{\Large\frac{2}{3}}$ intercepted between the axes is ................ .

asked Sep 13, 2013 by meena.p

0 answers

Tha smallest value of $x^2-3x+3$ in the interval $(-3,\large\frac{3}{2})$ is equal to :

asked Sep 13, 2013 by meena.p

1 answer

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