Recent questions tagged q52

Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating ?

asked Nov 6, 2017 by meena.p

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A solenoid 60 cm long and radius $4.0\;cm$ has 3 layers of winding of 300 turns each . A 2.0 cm long wire of mass $2.5 \;g$ inside the solenoid (near its center) normal to its axis, both the wire and the axis of the solenoid are in the horizontal plane. The wire is connected through two leads parallel to the axis of the solenoid to the external battery which supplies a current of $6.0$ in the sense of circulation ) in the windings of the solenoid can support the weight of the wire $(g= 9.8 m/g^2)$

asked Jul 29, 2015 by meena.p

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A rowland ring of mean radius $15\;cm$ has $3500$ turns of wire wound on a ferro magnetic core of relative permeability 800. What is the magnetic field B in the core for a magnetizing current of $12.A$?

asked Jul 15, 2015 by meena.p

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An infinite line charge produces a field of $ 9 \times 10^4 \;N/C$ at a distance of $2 \;cm$ . calculated linear charge density.

asked Apr 24, 2015 by meena.p

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If the parabola $y^2=4ax$ passes through the point $(3,2)$,then the length of its latus rectum is

asked Oct 16, 2014 by sreemathi.v

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State whether the following statement is true or false and justify : The vertex of an equilateral triangle is (2, 3) and the equation of the opposite side is $x + y = 2$. Then the other two sides are $y - 3 = (2 \pm \sqrt3 ) (x - 2)$.

asked Jul 8, 2014 by thanvigandhi_1

1 answer

True-or-False:Three letters can be posted in five letter boxes in $3^5$ ways

asked May 16, 2014 by sreemathi.v

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If $\sin \theta=-\large\frac{4}{5}$ and $\theta$ lies in third quadrant then the value of $\cos\large\frac{\theta}{2}$ is

asked Apr 21, 2014 by sreemathi.v

1 answer

Let PS be the median of the triangle with vertices P(2, 2), Q(6, –1) and R(7, 3). The equation of the line passing through (1, –1) and parallel to PS is

asked Apr 7, 2014 by sreemathi.v

1 answer

Ergocalciferol is a name of vitamin

asked Mar 28, 2014 by thanvigandhi_1

1 answer

Given that, $NH_3 + 3Cl_2(g) \rightarrow NCl_3(g) + 3HCl(g);\: \: \: \: \Delta H_1 = -x_1$ \[\] $N_2(g) + 3H_2(g) \rightarrow 2NH_3(g);\: \: \: \: \: \: \: \: \Delta H_2 = -x_2$ \[\] $H_2(g) + Cl_2(g) \rightarrow 2HCl(g);\: \: \: \: \: \: \: \: \Delta H_3 = x_3$ \[\] The heat of formation of $NCl_3(g)$ from the above data is

asked Mar 17, 2014 by thanvigandhi_1

1 answer

A basic lining is given to a furnace by using

asked Mar 17, 2014 by meena.p

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Which of the following alkenes possess highest reactivity in cationic polymerisation?

asked Mar 11, 2014 by thanvigandhi_1

1 answer

In which set of diatomic molecules is the bond order three

asked Mar 6, 2014 by sreemathi.v

1 answer

Which one of the following statement is correct for $CsBr_3$?

asked Mar 5, 2014 by sreemathi.v

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Identify Z in the following sequence of reactions

asked Mar 4, 2014 by sreemathi.v

1 answer

The speed of light in air, if an electromagnetic wave is travelling in air whose dielectric constant is $k = 1.006$, will be :

asked Feb 28, 2014 by thanvigandhi_1

1 answer

Give the numbers of N and M?

asked Feb 24, 2014 by meena.p

1 answer

In the below reaction the product P is

asked Feb 21, 2014 by sreemathi.v

1 answer

The standard reduction potentials at 298K for following half reaction are given against each.
$Zn^{+2}(aq)+2e^-\leftrightharpoons 2n(s)=-0.762$
$Cr^{+3}(aq)+3e^-\leftrightharpoons Cr(s)=-0.740$
$2H^+(aq)+3e^-\leftrightharpoons H_2(g)=0$
$Fe^{+3}(aq)+e^-\leftrightharpoons Fe^{+2}(aq)=0.770$.

Which is the strongest reducing agent ?

asked Feb 17, 2014 by sreemathi.v

1 answer

Find the solution : $y (\log x-1) y dx=x dy $

asked Feb 5, 2014 by meena.p

1 answer

Find the equation of common tangent to the parabola $y^2=4x$ and $x^2=4y$?

asked Feb 5, 2014 by sreemathi.v

1 answer

In coordination chemistry, the donor atom of a ligand is

asked Feb 3, 2014 by sreemathi.v

1 answer

Which one of the following is highest melting halide.

asked Jan 30, 2014 by sreemathi.v

1 answer

Under the conditions when no bias is applied across a p-n junction

asked Jan 28, 2014 by meena.p

1 answer

The least ionic chloride is given by

asked Jan 28, 2014 by sreemathi.v

1 answer

Find the geometric mean of 5 numbers 2, 8, 16, 128, 512

asked Jan 24, 2014 by thanvigandhi_1

1 answer

Weight of $H_2O_2$ present in 560ml of 20vol $H_2O_2$ solution is approx

asked Jan 23, 2014 by sreemathi.v

1 answer

Which is not responsible for environment pollution

asked Jan 21, 2014 by sreemathi.v

1 answer

Uncertainty in position of a minute particle of mass 25g in space is $10^{-5}$m.The uncertainty in its velocity (in $ms^{-1})$ is

asked Jan 13, 2014 by sreemathi.v

1 answer

The haemoglobin from the red blood corpuscles of most mammals contains approximately 0.33% of iron by weight.The molecular weight of haemoglobin as 67,200.The numbers of iron atoms in each molecule of haemoglobin is (at wt of iron=56)

asked Jan 9, 2014 by sreemathi.v

1 answer

Find the sum of the series $3^2$ + $5^2$ + $7^2$ +-----upto 10 terms

asked Jan 3, 2014 by yamini.v

1 answer

The equation of the plane through the line of intersection of the planes $ax+by+cz=d=0$ and $a'x+b'y+c'z+d'=0$ and parallel to the line $y=0,z=0$ is ?

asked Jan 3, 2014 by rvidyagovindarajan_1

1 answer

$\lim\limits_{x\to 0}(1+ax)^{\Large\frac{b}{x}}$=

asked Dec 24, 2013 by sreemathi.v

1 answer

Integrate: $\int \limits_0^{\large\frac{2}{3}}$$ \large\frac{dx}{4+ 9x^2}$

asked Dec 16, 2013 by meena.p

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