Recent questions tagged q4

What is the negation of the statement - All triangles are not Equilateral triangles.

asked Jan 17, 2014 by thanvigandhi_1

1 answer

Determine the frequency of revolution of the electron in $2^{nd}$ Bohr's orbit in hydrogen atom

asked Jan 9, 2014 by sreemathi.v

1 answer

An experiment can result in only 3 mutually exclusive events A,B and C. If $ P(A) = 2P(B) = 3P(C) $ then $P(A) =$

asked Jan 3, 2014 by thanvigandhi_1

1 answer

Three mangoes and three apples are kept in a box. If two fruits are selected at random from the box, the probability that the selection will contain one mango and one apple is

asked Jan 3, 2014 by thanvigandhi_1

1 answer

A bag contains 5 black and 3 white balls. Two balls are drawn from the bag at random and without replacement. The probability of obtaining both white balls is :

asked Jan 2, 2014 by thanvigandhi_1

1 answer

Find the sum of the series 1, $\frac {7}{5}$, $\frac {13}{25}$, $\frac {19}{25}$,----,$\infty$.

asked Dec 30, 2013 by yamini.v

1 answer

The distance of the plane $2x-3y+6z+14=0$ from origin is ?

asked Dec 22, 2013 by rvidyagovindarajan_1

1 answer

$\lim\limits_{x\to 1}(1-x)\tan\large\frac{\pi x}{2}$=__________

asked Dec 20, 2013 by sreemathi.v

1 answer

A particle moves in a straight line with a constant acceleration. It changes its velocity from $ 10 \: ms^{-1} $ to $ 12 \: ms^{-1} $ while passing through a distance 135 m in $t$ second. The value of $t$ is :

asked Dec 14, 2013 by thanvigandhi_1

0 answers

Integrate $\int \limits_0^3 \sqrt {\large\frac{x}{3-x}}$$dx$

asked Dec 12, 2013 by meena.p

1 answer

Given the $rx_n, \;2Fe^{3+}(aq)+Sn^{2+}(aq)\rightarrow 2Fe^{2+}(aq)+Sn^{4+}(aq)$ what is the equ.constant of given $rx_n$

asked Dec 10, 2013 by sreemathi.v

1 answer

Match Column I (Name of the compound ) with Column II (structure/geometry of the molecule) and select the correct answer.

asked Dec 9, 2013 by sreemathi.v

1 answer

Endodermis is a part of :

asked Dec 6, 2013 by thanvigandhi_1

1 answer

Which of the following represent the correct order of decreasing lattice energy?

asked Dec 6, 2013 by sreemathi.v

1 answer

In $C_2H_5OH$, which type of hydrogen bond can be observed

asked Dec 6, 2013 by sreemathi.v

1 answer

An unknown compound decolourises bromine in carbon tetrachloride and it undergoes catalytic reduction to give decalin. When treated with warm, concentrated potassium permangate, this compound give cis-cyclohexane-1,2- dicarboxylic acid and oxalic acid. Propose a structure for the unknown compound.

asked Dec 4, 2013 by sreemathi.v

1 answer

Refer to the below equation:

asked Dec 2, 2013 by sreemathi.v

1 answer

The cells which help in rolling and unrolling of leaf lamina in grasses are

asked Dec 1, 2013 by thanvigandhi_1

1 answer

Metallic nature in V-A elements

asked Nov 26, 2013 by sreemathi.v

1 answer

If $A=\begin{bmatrix}3&3&3\\3&3&3\\3&3&3\end{bmatrix}$ then $A^4$ is equal to

asked Nov 25, 2013 by sreemathi.v

1 answer

Chicory is obtained from :

asked Nov 24, 2013 by thanvigandhi_1

0 answers

The following features are found in both Balanophora and Casuarina

asked Nov 22, 2013 by thanvigandhi_1

0 answers

The parameter on which the value of the determinant $\begin{vmatrix}1&x&x+1\\\cos(p-d)x&\cos px&\cos(p+d)x\\\sin(p-d)x&\sin px&\sin(P+d)x\end{vmatrix}$ does not defined upon is

asked Nov 22, 2013 by sreemathi.v

1 answer

Which of the following can exist beyond critical temperature and critical pressure?

asked Nov 13, 2013 by mosymeow_1

1 answer

A 2 kg ball moving at $24 ms^{-1}$ undergoes inelastic head-on collision with a 4 kg ball moving in the opposite direction at $48\;ms^{-1}$. If the coefficient of restitution is $2/3$, their velocities in $ms^{-1}$ after impact are :

asked Nov 13, 2013 by meena.p

1 answer

$x=\large\frac{1}{2}$$ \bigg(\sqrt 3+\large\frac{1}{\sqrt 3} \bigg)$ then $\large\frac{\sqrt {x^2-1}}{x-\sqrt {x^2-1}}$ is equal to :

asked Nov 11, 2013 by meena.p

1 answer

Study the following lists

asked Nov 10, 2013 by thanvigandhi_1

0 answers

Observe the following statements regarding purification of bauxite:

asked Nov 8, 2013 by meena.p

0 answers

The equation of trajectory of a projectile is $y= 10 x - \bigg(\large\frac{5}{9} \bigg)x^2$. If we assume $g=10\;ms^{-2},$ the range of projectile (in meter) is :

asked Nov 7, 2013 by meena.p

0 answers

The equation of trajectory of a projectile is $y=10x-\bigg(\large\frac{5}{9}\bigg)x^2$. If we assume $g=10\;ms^{-2}, the range of projectile (in metre) is :

asked Nov 7, 2013 by meena.p

0 answers

n-Butane is produced by the monobromination of ethane followed by word reaction .Calculate the volume of ethane at NTP to produce 55g n-butane if the bromination takes place with 90% yield and worth reaction with 85% yield.

asked Nov 6, 2013 by sreemathi.v

1 answer

If $x= \sqrt {\large\frac{2+\sqrt 3}{2 -\sqrt 3}}$, then $x^2(x-4)^2$ is equal to

asked Nov 5, 2013 by meena.p

1 answer

Which of the following is used for making optical instruments?

asked Oct 29, 2013 by meena.p

1 answer

If $\theta$ is the angle between the vectors $\overrightarrow a$ and $\overrightarrow b$, and $ |\overrightarrow a.\overrightarrow b|=|\overrightarrow a\times\overrightarrow b|$, then $\theta$=?

asked Oct 28, 2013 by rvidyagovindarajan_1

1 answer

A motor is used to deliver water at a certain rate through a given horizontal pipe. To deliver n-times the water through the same pipe in the same time the power of the motor must be increased as follows :

asked Oct 28, 2013 by meena.p

1 answer

Study the following table showing the components of water potential of three mesophyll cells - A,B and C

asked Oct 25, 2013 by thanvigandhi_1

1 answer

$\sqrt {2+\sqrt {5}-\sqrt{6-3 \sqrt {5}+\sqrt {14-6 \sqrt{5}}}}$ is equal to

asked Oct 24, 2013 by meena.p

1 answer

The chemical formula of feldspar is

asked Oct 23, 2013 by meena.p

1 answer

How many molecules of water and oxygen atoms are present in 0.9g of water?

asked Oct 22, 2013 by sreemathi.v

1 answer

A rifle of 20 kg mass can fire 4 bullets per second. The mass of each bullets per second. The mass of each bullet is $35 \times 10^{-3}\;kg$ and its final velocity is $400\;ms^{-1}.$ Then what force must be applied on the rifle so that it does not move backwards while firing the bullets?

asked Oct 22, 2013 by meena.p

1 answer

A piece of copper weighs $0.635g.$How many atoms of copper does it contain?

asked Oct 22, 2013 by sreemathi.v

1 answer

Let $A$ and $B$ denote the statements $A=\cos \alpha+\cos \beta+\cos\gamma=0,B=\sin\alpha+\sin\beta+\sin\gamma=0$.If $\cos(\beta-\gamma)+\cos(\gamma-\alpha)+\cos(\alpha-\beta)=-\large\frac{3}{2}$ then

asked Oct 17, 2013 by sreemathi.v

1 answer

Given that $a,b \in \{0,1,2,.........,9\}$ with $ a+b \neq 0$ and that $\bigg(a, \large\frac{b}{10}$$ \bigg)^x=\bigg(\large\frac{a}{10},\frac{b}{100}\bigg)^y$$-1000$ Then $\large\frac{1}{x}-\frac{1}{y}=$

asked Oct 16, 2013 by meena.p

1 answer

Assertion (A) : Presence of xylem vessels is a primitive character. Reasons (R) : Xylem vessels are present in some pteridophytes like selaginella.

asked Oct 15, 2013 by thanvigandhi_1

1 answer

If $\large\frac{\sin^4x}{2}+\frac{\cos^4x}{3}=\frac{1}{5}$ then

asked Oct 14, 2013 by sreemathi.v

1 answer

The number of subsets of $\{1,2,3......,9\}$ containing at least one odd number is :

asked Oct 8, 2013 by meena.p

1 answer

The value of $\cos(45^{\circ}-A)\cos(45^{\circ}-B)-\sin(45^{\circ}-A)\sin(45^{\circ}-B)$ is equal to

asked Oct 4, 2013 by sreemathi.v

1 answer

A sample of liquid has an initial volume of $1.5 \;l$. The volume is reduced to $0.2 ml$ . When the pressure increased by $140\;R\;pa$. What is bulk modulus of liquid

asked Oct 2, 2013 by meena.p

1 answer

Identify the correct pair of statements from the following

asked Oct 1, 2013 by thanvigandhi_1

1 answer

Let $n= 1 !+ 4 !+7 !+.............+400 !$. Then ten's digits of $n$ is :

asked Sep 26, 2013 by meena.p

1 answer

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