Recent questions tagged q5

Electronic configuration of Deuterium is

asked Jan 22, 2014 by sreemathi.v

1 answer

In which region of atmosphere,lowest temperature are observed?

asked Jan 20, 2014 by sreemathi.v

1 answer

Mary says "The number I am thinking is divisible by 2 or it is divisible by 3". This statement is false if the number Mary is thinking of is

asked Jan 18, 2014 by thanvigandhi_1

1 answer

In which of the following statements is the $"\text{or}"$ inclusive?

asked Jan 17, 2014 by thanvigandhi_1

1 answer

A hydrogen atom in the ground state is hit by a particle exciting the electron to 4s orbital.The electron then drops to 2s orbital.What is the frequency of radiation emitted and absorbed in the process?

asked Jan 9, 2014 by sreemathi.v

1 answer

If $X$ follows a binomial distribution with parameters $n$ and $p$. $p \lt 0 \lt 1$ If $ P(X=r)/P(X=n-r)$ is independent of $ n \:$ and$\: r$ , then value of p is :

asked Jan 6, 2014 by thanvigandhi_1

1 answer

A,B and C take one shot each at a target. Their probability of hitting the target are respectively 0.4, 0.5 and 0.8. The probability that at least two of them hit the target is

asked Jan 3, 2014 by thanvigandhi_1

1 answer

A coin is tossed thrice. The probability of getting head at least once is

asked Jan 2, 2014 by thanvigandhi_1

1 answer

If the 7th term of an AP is 23 and the 12th term is 38, find the first term 'a' and common difference 'd'.

asked Dec 30, 2013 by yamini.v

1 answer

If the line $\large\frac{x-2}{3}=\frac{y-1}{-5}=\frac{z-2}{2}$ lie in the plane $x+3y-\alpha z+\beta=0, \;\;then\:\:(\alpha,\beta)=?$

asked Dec 23, 2013 by rvidyagovindarajan_1

1 answer

$\lim\limits_{x\to -\infty}\bigg[\large\frac{x^4\sin(1/x)+x^2}{(1+|x|^3)}\bigg]$=

asked Dec 20, 2013 by sreemathi.v

1 answer

A particle shows distance - time curve as given in the figure. The maximum instantaneous velocity of the particle is around the point :

asked Dec 14, 2013 by thanvigandhi_1

0 answers

Integrate : $\int\limits_0^5 \sqrt {\large\frac{x^3}{5-x}}dx$

asked Dec 12, 2013 by meena.p

1 answer

Calculate the stability constant of the complex $[Zn(NH_3)_4]^{2+}$ formed in the $rx_n$:$Zn^{2+}+4NH_3\rightleftharpoons[Zn(NH_3)_4]^{2+}$. The stability constant 'K' is

asked Dec 10, 2013 by sreemathi.v

1 answer

VSEPR notation of $PCl_5, H_2O$ and $ICl_4^-$ are

asked Dec 9, 2013 by sreemathi.v

1 answer

The type of vascular bundles in the stem of Dracaena

asked Dec 6, 2013 by thanvigandhi_1

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Which of the following represent the correct order of increase in covalent character?

asked Dec 6, 2013 by sreemathi.v

1 answer

In which physical state of a compound, the magnitude of hydrogen bonding is very high

asked Dec 6, 2013 by sreemathi.v

1 answer

Refer to the below reaction:

asked Dec 4, 2013 by sreemathi.v

1 answer

Arrange in decreasing order of reactivity with HCl

asked Dec 2, 2013 by sreemathi.v

1 answer

The seat of origin of the lateral root is

asked Dec 1, 2013 by thanvigandhi_1

0 answers

The Bond angle of Ammonia

asked Nov 26, 2013 by sreemathi.v

1 answer

If $\begin{bmatrix}0&a\\b&0\end{bmatrix}^4=I$ then

asked Nov 25, 2013 by sreemathi.v

1 answer

The variety 'VaraLakshmi' belongs to this crop :

asked Nov 24, 2013 by thanvigandhi_1

0 answers

The following plant produces both offsets and bulbils

asked Nov 22, 2013 by thanvigandhi_1

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$A=\begin{bmatrix}1&0&0\\0&1&1\\0&-2&4\end{bmatrix}$ and $I=\begin{bmatrix}1&0&0\\0&1&0\\0&0&1\end{bmatrix}$ and $A^{-1}=[\large\frac{1}{6}$$(A^2+cA+dI)]$ then the value of $c$ and $d$ are

asked Nov 22, 2013 by sreemathi.v

1 answer

Why does the solubilities of anhydrous salts decrease with increase in temperature?

asked Nov 13, 2013 by mosymeow_1

1 answer

The block of mass 2 kg is initially at rest on a horizontal force $\overrightarrow {F}=(9-x^2) \hat i$ newtons acts on it, when the block is at $x=0$. The maximum kinetic energy of the block between $x=0$ and $x=3m$ in joule is :

asked Nov 13, 2013 by meena.p

1 answer

If $a,bc \neq 0$ and belong to the set $\{0,1,2,3.......,9\},$ then $\log _{10} \bigg(\large \frac{a+10 b +10^2 c}{10^{-4} a +10^{-3}b +10^{-2} c}\bigg)$ is equal to :

asked Nov 11, 2013 by meena.p

1 answer

From the following identify the plants having inflorescences with male, female and sterile flowers :

asked Nov 10, 2013 by thanvigandhi_1

0 answers

Sodium is heated in air at $300 ^{\circ}C$ to form x.x absorbs $CO_2$ and forms $Na_2CO_3$ and Y. Which of the following is Y?

asked Nov 8, 2013 by meena.p

0 answers

The machine gun fires 240 bullets per minute. If the mass of each bullet is 10 g and the velocity of the bullets is $600\; ms^{-1}$ the power (in kW) of the gun is :

asked Nov 7, 2013 by meena.p

1 answer

A gas mixture of $3l$ of propane $(C_3H_8)$ and butane $C_4H_{10}$ on complete combustion at $25C^{\large\circ}$ produced $10l$ $CO_2$.Find out the composition of gas mixture.

asked Nov 6, 2013 by sreemathi.v

1 answer

$\sqrt {12-\sqrt {68+48 {\sqrt {2}}}}$ is equal to :

asked Nov 5, 2013 by meena.p

1 answer

Which of the following is not correct?

asked Oct 29, 2013 by meena.p

1 answer

$(\hat i\:\hat j\:\hat k)+(\hat j\:\hat k\: \hat i)+(\hat k\:\hat j\:\hat i)=?$

asked Oct 28, 2013 by rvidyagovindarajan_1

1 answer

A bullet of mass 10g id fired horizontally with a velocity $1000 ms^{-1}$ from a rifle situated at a height 50 m above the ground. If the bullet reaches the ground with a velocity $500 ms^{-1}$, the work done against air resistance in the trajectory of the bullet is : $ (g=10\;ms^{-2})$

asked Oct 28, 2013 by meena.p

1 answer

The number of stomata and epidermal cell in $ 1 mm^2$ area of abaxial surface of the leaves of A, B , C and D plants are given below. Identify the plant having the least stomatal index :

asked Oct 25, 2013 by thanvigandhi_1

1 answer

If $a^x=b^y=c^z=d^w$, the value of $x \bigg(\large\frac{1}{y}+\frac{1}{z}+\frac{1}{w}\bigg)$ is

asked Oct 24, 2013 by meena.p

1 answer

Assertion (A); NaCl is less soluble in heavy water than in ordinary water. Reason (R) : Dielectric constant of ordinary water is more than that of heavy water.

asked Oct 23, 2013 by meena.p

1 answer

What is the mass of $3.01\times 10^{22}$ molecules of ammonia?

asked Oct 22, 2013 by sreemathi.v

1 answer

An object of mass 2m is projected with a speed of $100\;ms^{1}$ at an angle $\theta=\sin ^{-1} \bigg(\large\frac{3}{5}\bigg)$ to the horizontal. At the highest point, the object breaks into two pieces of same mass m and the first one comes to rest. The distance between the point of projection and the point of landing of the bigger piece (in meter) is (Given , $g= 10 m/s^2$)

asked Oct 22, 2013 by meena.p

1 answer

An unknown element forms an oxide.What will be the equivalent mass of the element if the oxygen content is 20% by mass ?

asked Oct 22, 2013 by sreemathi.v

1 answer

If $u=\sqrt{a^2\cos^2\theta+b^2\sin^2\theta}+\sqrt{a^2\sin^2\theta+b^2\cos^2\theta}$ then the difference between the maximum and minimum values of $u^2$ is given by

asked Oct 17, 2013 by sreemathi.v

1 answer

If $x= \large\frac{1}{2} \bigg(\sqrt 7+\large\frac{1}{\sqrt 7}\bigg)$ then $\large\frac{\sqrt {x^2-1}}{x- \sqrt {x^2-1}}=$

asked Oct 16, 2013 by meena.p

0 answers

Which of the following is correct?

asked Oct 15, 2013 by thanvigandhi_1

1 answer

The number of distinct real roots of $\begin{vmatrix}\sin x&\cos x&\cos x\\\cos x&\sin x&\cos x\\ \cos x&\cos x&\sin x\end{vmatrix}=0$ in the interval $-\large\frac{\pi}{4}$$\leq x\leq \large\frac{\pi}{4}$ is

asked Oct 14, 2013 by sreemathi.v

1 answer

$p$ points are chosen on each of the three co planar lines. The maximum number of triangles formed with vertices at these points is :

asked Oct 8, 2013 by meena.p

1 answer

The value of $\sin(n+1)A\sin(n+2)A+\cos(n+1)A\cos(n+2)A$ is equal to

asked Oct 4, 2013 by sreemathi.v

1 answer

What is the work done in splitting a drop of water 1 mm radius into $10^6$ droplets (surface tension of water $= 72 \times 10^{-3} \; J/m^2$)

asked Oct 2, 2013 by meena.p

1 answer

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