Recent questions tagged q102

When a carbon atom is linked to four different groups it is said to be chiral carbon atom. when alpha hydrogen atom of an alkane is replaced by a functional group we get corresponding compound. Lowest molecular mass optically active ketone contians ____ carbon atoms?

asked Mar 25, 2014 by balaji.thirumalai

1 answer

The concentration of $O_2$ and $CO_2$ is variable but on the average , $100\;mL$ blood contains 0.02g of $O_2$ and $0.08\;g$ of $CO_2$. Calculate the Volume of $O_2$ and $CO_2$ at $1\; atm$ and body temperature $37^{\large\circ}C$ assuming $10$ litre blood in human body.

asked Mar 1, 2014 by sharmaaparna1

1 answer

When a carbon atom is linked to four different groups it is said to be chiral carbon atom. when alpha hydrogen atom of an alkane is replaced by a functional group we get corresponding compound. Lowest molecular mass optically active ketone contians ____ carbon atoms?

asked Feb 27, 2014 by meena.p

1 answer

Refer the below reaction:Compound F gives positive Schiff's test but (E) does not.Give structures of A and F

asked Feb 26, 2014 by sreemathi.v

1 answer

For the hyperbola $\large\frac{x^2}{36}-\frac{y^2}{16}$$=1$ find the ecentricity?

asked Feb 10, 2014 by sreemathi.v

1 answer

If x, y, z > 1 are in GP, then $\frac{1}{1+lnx}$, $\frac{1}{lny}$, $\frac{1}{lnz}$ are in

asked Jan 20, 2014 by yamini.v

1 answer

Calculate the uncertainty in velocity of an electron if uncertainty in its position is of the order of $1A^{\large\circ}$

asked Jan 16, 2014 by sreemathi.v

1 answer

If $f(a)=2$, $f'(a)=1$, $g(a)=-1$, $g'(a)=2$, then the value of $\lim\limits_{x\to a}\large\frac{g(x)f(a)-g(a)f(x)}{x-a}$ is

asked Dec 31, 2013 by sreemathi.v

1 answer

The length of median through $A$ of the $\Delta\:ABC$ where $\overrightarrow {AB}=3\hat i+4\hat k\:\:and\:\:\overrightarrow {AC}=5\hat i-2\hat j+4\hat k$ is ?

asked Dec 30, 2013 by rvidyagovindarajan_1

1 answer

Integrate : $\int \sqrt x e^{\large (x)^{3/2}} \cos (e^{\large(x)^{3/2}}. dx$

asked Dec 19, 2013 by meena.p

1 answer

Thermococcus,methanococcus and methanobacterium exemplify :

asked Dec 18, 2013 by thanvigandhi_1

1 answer

A sound wave travels with a velocity of $ 300\: ms^{-1}$ through a gas. 9 beats are produced in 3 sec when two waves pass through it simultaneously. If one of the waves has 2 m wavelength, the wavelength of the other wave is :

asked Nov 17, 2013 by thanvigandhi_1

1 answer

An Aluminium and Copper wire of same cross sectional area but having lengths in the ratio 2 : 3 are joined end to end. This composite wire is hung from a rigid support and a load is suspended from the free end. If the increase in length of the composite wire is 2.1 mm , the increase in lengths of Aluminium and Copper wires are : [$ Y_{AI} = 20\times 10^{11}N/m^2\: and \: Y_{Cu} = 12 \times 10^{11} N/m^2]$

asked Nov 2, 2013 by thanvigandhi_1

1 answer

Assertion (A) : The air pressure in the car tyre increases during driving. Reasons (R) : Temperature of air in the tyre increases due to friction of tyre with road. Increase in temperature results in an increase in pressure according to Charle's law .

asked Oct 20, 2013 by thanvigandhi_1

1 answer

A car is moving with a speed of 72 kmph towards a hill. Car blows horn at a distance of 1800 m from the hill. If echo is heard after 10 seconds, the speed of sound (in m/sec.) is

asked Oct 18, 2013 by meena.p

1 answer

Four light sources produce the following four waves :(i) $y_1= a \sin(\omega t+\phi _1)$ (ii) $y_2= a \sin 2 \omega t $ (iii) $y_3= a' \sin(\omega t+\phi _2)$ (iv) $y_4= a' \sin(3 \omega t+\phi)$ Superposition of which two waves give rise to interference ?

asked Oct 11, 2013 by meena.p

1 answer

A particle is executing simple harmonic motion along a straight line. At displacements $r_1 \: and r_2$ from its mean position the velocities are $v_1 \: and \: v_2$ . The time period of the particle is

asked Oct 10, 2013 by thanvigandhi_1

1 answer

A sonometer wire has a length of $114$ cm, between two fixed ends. Where should two bridges be placed so as to divide the wire into three segments (in cm) whose fundamental frequencies are in the ratio 1 : 3 : 4 ?

asked Sep 30, 2013 by meena.p

2 answers

A reversible engine converts one-sixth of the heat supplied into work. When the temperature of the sink is reduced by $62^{\circ}C$, the efficiency of the engine is doubled. The temperatures of the source and skin are:

asked Sep 24, 2013 by meena.p

1 answer

A source of sound of frequency 640 Hz is moving at a velocity of $\large\frac{100}{3}$$\;m/s$ along a road, and is at an instant 30 m away from a point A on the road (as shown in figure). A person standing at $O$, $40 \;m$ away from the road hears sound of apparent frequency $v^1$. The value of $v^1$ is (velocity of sound= 340 \;m/s)

asked Sep 17, 2013 by meena.p

0 answers

The integrating factor of the differential equation $\large\frac{dy}{dx}$$-y\tan x=\cos x $ is

asked May 24, 2013 by poojasapani_1

1 answer

The radius of the director circle of the conic $9x^{2}+16y^{2}=144 $ is

asked May 13, 2013 by poojasapani_1

1 answer

True or False: If A and B are two events such that P(A)>0 and P(A)+P(B)>1,then\[P(B|A)\geq 1-\frac{p(B')}{P(A)}\]

asked Jan 10, 2013 by sreemathi.v

1 answer

True or False: Rolle's theorem is applicable for the function $f(x)=|x-1|$ in [0,2].

asked Jan 3, 2013 by sreemathi.v

1 answer

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