Recent questions tagged q10

Refer to the below equation :

asked Dec 4, 2013 by sreemathi.v

1 answer

Consider the following transformation in which a cyclic bromoether is formed than the expected bromohydrin. Which of the electron pushing scheme represents the mechanism of this reaction?

asked Dec 3, 2013 by sreemathi.v

1 answer

Promycelium in Rhizopus develops from

asked Dec 1, 2013 by thanvigandhi_1

0 answers

In the following which is correct in stability order

asked Nov 26, 2013 by sreemathi.v

1 answer

If $\alpha,\beta,\gamma$ are the cube roots of unity,then the value of the determinant $\begin{vmatrix}e^{\alpha}&e^{2\alpha}&e^{3\alpha}-1\\e^{\beta}&e^{2\beta}&e^{3\beta}-1\\e^{\gamma}&e^{2\gamma}&e^{3\gamma}-1\end{vmatrix}$ is equal to

asked Nov 25, 2013 by sreemathi.v

1 answer

Bacillus mycoides is :

asked Nov 24, 2013 by thanvigandhi_1

0 answers

Free central placentation is found in

asked Nov 22, 2013 by thanvigandhi_1

0 answers

If the matrix $A=\begin{bmatrix}y+a&b&c\\a&y+b&c\\a&b&y+c\end{bmatrix}$ has rank 3 then

asked Nov 22, 2013 by sreemathi.v

1 answer

For the reaction $ 2A(g) + B(g) \rightleftharpoons 3C(g) + 4D(g)$ Three moles each of $A$ and $B$ were taken into a $1\; L$ flask. which of the following is always true when the system attains equilibrium?

asked Nov 13, 2013 by mosymeow_1

1 answer

The escape velocity of a body on the earth's surface is $v_e$. A body is thrown up with a speed $\sqrt 5 v_c$. Assuming that the sun and planets do not influence the motion of the body, velocity of the body at infinite distance, is :

asked Nov 13, 2013 by meena.p

1 answer

If $|x| < \large\frac{1}{2}$, then the coefficient of 'x' in the expansion of $\large\frac{1+2x}{(1-2x)^2}$ is :

asked Nov 11, 2013 by meena.p

1 answer

Assertion (A) : Phylogenetic systems of classification are considered as post-Darwinian. Reasons (R) : They are proposed after the publication of the book ' Origin of species '.

asked Nov 10, 2013 by thanvigandhi_1

0 answers

The atomic numbers of elements X,Y and Z are 19,21 and 25 respectively. The number of electrons present in the M shell of these elements follow the order:

asked Nov 8, 2013 by meena.p

1 answer

Identify the increasing order of the angular velocities of the following :

asked Nov 7, 2013 by meena.p

1 answer

0.5g of a mixture of $K_2CO_3$ and $Li_2CO_3$ required 30ml of 0.25N HCl solution for neutralization.What is % composition mixture ?

asked Nov 6, 2013 by sreemathi.v

1 answer

The correct matching of List I from List II is :

asked Nov 5, 2013 by meena.p

1 answer

If $\overrightarrow a,\:\overrightarrow b\:and\:\overrightarrow c$ are mutually $\perp$ vectors of equal magnitude then the angle $\theta$ made by $\overrightarrow a+\overrightarrow b+\overrightarrow c$with any one of these 3 vectors is ?

asked Oct 30, 2013 by rvidyagovindarajan_1

1 answer

The uncertainties in the velocities of two particle A and B are $0.05$ and $0.02\;m/s^{-1}$ respectively. The mass of B is five times to that of mass A. What is the ratio of uncertainties $\bigg(\large\frac{\Delta x_A}{\Delta x_B}\bigg)$ in their positions ?

asked Oct 30, 2013 by meena.p

1 answer

Assume the earths orbit around the sun as circular and the distance between their centers as D. Mass of the earth is M and its radius is R. If earth has an angular velocity $\omega _0$ with respect to its center and $\omega$with respect to the center of the sun, the total kinetic energy of earth is :

asked Oct 28, 2013 by meena.p

1 answer

Assertion (A) : Reduced coenzyme formed in the oxidation of isocitric acid accounts for more ATP production in electron transport than the reduced coenzyme formed in succinic acid oxidation. Reasons (R) : In the reoxidation of mitochondrial NADH, the number of protons translocated from matrix to intermembrane space is less than the protons translocated when $FADH_2$ is oxidized.

asked Oct 25, 2013 by thanvigandhi_1

1 answer

The sum of the series $\large\frac{3}{4.8}-\frac{3.5}{4.8.12}+\frac{3.5.7}{4.8.12.16}-...........$

asked Oct 24, 2013 by meena.p

1 answer

Which of the following is not a conjugate acid- base pair?

asked Oct 23, 2013 by meena.p

1 answer

How many years it would take to spend one Avogadro's number of rupees at a rate of 10lakh of rupees in one second

asked Oct 23, 2013 by sreemathi.v

1 answer

Two solid spheres (A and B) are made of metals of different densities $p_A$ and $p_B$ respectively. If their masses are equal, the ratio of their moments of inertia $(I_B / I_A)$ about their respective diameter is

asked Oct 22, 2013 by meena.p

1 answer

Which has the maximum number of atom

asked Oct 22, 2013 by sreemathi.v

1 answer

The value of $\large\frac{\sec 8\theta-1}{\sec 4\theta-1}$ is equal to

asked Oct 18, 2013 by sreemathi.v

1 answer

If $\alpha=\large\frac{5}{2 ! 3}+\frac{5.7}{3 ! 3^2}+ \frac{5.7.9}{4 ! 3^3}+........,$ then $ \alpha^2+4 \alpha=$

asked Oct 16, 2013 by meena.p

1 answer

Identify the correct pair of plants with odd number of leaflets in a compound leaf

asked Oct 16, 2013 by thanvigandhi_1

1 answer

If $\tan\alpha=\large\frac{1}{\sqrt{x(x^2+x+1)}}$,$\tan\beta=\large\frac{\sqrt x}{\sqrt{x^2+x+1}}$ and $\tan\gamma=\sqrt{x^{-3}+x^{-2}+x^{-1}}$ then $\alpha+\beta$ is

asked Oct 14, 2013 by sreemathi.v

1 answer

$\large\frac{1}{e^{3x}}$$(e^x+e^{5x})=a_0+a_1x+a_2x^2+.........=>\; 2a_1+2^3a_3+2^5a_5+........=$

asked Oct 9, 2013 by meena.p

1 answer

The minimum value of $\cos(\cos x)$ is

asked Oct 7, 2013 by sreemathi.v

1 answer

A wire of length L and cross-sectional area A is made of material of Young's modulus Y. The work done in stretching the wire by an amount x is given by

asked Oct 3, 2013 by meena.p

2 answers

Study the following lists

asked Oct 2, 2013 by thanvigandhi_1

1 answer

$\log _4 2-\log _g 2+\log _{16} 2-...............=$

asked Sep 26, 2013 by meena.p

1 answer

$u=u(x,y)=\sin (y+ax)-(y+ax)^2=>$

asked Sep 20, 2013 by meena.p

1 answer

$\large\frac{1}{2.3}+\frac{1}{4.5}+\frac{1}{6.7}+\frac{1}{8.9}+............$

asked Sep 13, 2013 by meena.p

1 answer

Equation to the common tangent to the circle $x^2+y^2=2a^2$ and the parabola $y^2=8ax$ is ................ .

asked Sep 13, 2013 by meena.p

0 answers

If the mean and variance of a binomial distribution are $\large\frac{15}{4}$ and $\large\frac{15}{16}$. The number of trials are:

asked Sep 13, 2013 by meena.p

1 answer

Three faradays of electricity was passed through an aqueous solution of iron (II) bromide. The weight of iron metal (at. wt.= 56) deposited at the cathode is (in grams):

asked Sep 11, 2013 by meena.p

1 answer

In photoelectric effect the slope of straight line graph between stopping potential and frequency of incident radiation gives the ratio of Planck constant to ................ .

asked Sep 11, 2013 by meena.p

2 answers

The total mechanical energy of a harmonic oscillator of $A=1$ m and force constant $200 N/m$ is 150 J. Then:

asked Sep 10, 2013 by meena.p

1 answer

Refer to the below image :

asked Sep 5, 2013 by sreemathi.v

1 answer

Trace the major product of the following reaction

asked Aug 26, 2013 by sreemathi.v

1 answer

Which of the following represents the correct graph for SN2 reaction?

asked Aug 22, 2013 by sreemathi.v

1 answer

In the figure below ,the feasible region (shaded)for a LPP is shown .Determine the maximum and minimum value of $Z=x+2y$

asked Aug 20, 2013 by sreemathi.v

1 answer

Find the maximum value of $2x^3 – 24x + 107$ in the interval $[-3,-1]$

asked Aug 19, 2013 by sreemathi.v

1 answer

Two planets have same average density but their radii are $R_1$ and $R_2$. If acceleration due to gravity on these planets are $g_1$ and $g_2$ respectively.

asked Aug 9, 2013 by meena.p

1 answer

A 50kg man with 20kg load on his head climbs up 20 steps of 0.25m height each. The work done in climbing is

asked Jul 17, 2013 by meena.p

1 answer

Two masses of $10\; kg$ and $20\; kg$ respectively are connected by a massless spring. A pull of $100 N$ acts on the mass $20 kg$. If the instantaneous acceleration of 10 kg mass is $2 m/s^2$, what is the acceleration of $20 kg$ mass

asked Jul 4, 2013 by meena.p

1 answer

A black and a red dice are rolled. Find the conditional probability of obtaining a sum greater than 9, given that the black die resulted in a 5.

asked Jun 18, 2013 by balaji.thirumalai

1 answer

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