Recent questions tagged medium

Identify the structures marked as A, B, C, D, E in order in the picture :

asked Mar 26, 2014 by pady_1

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Identify the structures marked as A, B, C, D, E in order in the picture :

asked Mar 26, 2014 by pady_1

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Identify the procedure showm in the picture:

asked Mar 26, 2014 by pady_1

1 answer

Identify the procedure showm in the picture:

asked Mar 26, 2014 by pady_1

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Identify the picture:

asked Mar 26, 2014 by pady_1

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Identify the picture:

asked Mar 26, 2014 by pady_1

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Identify the picture:

asked Mar 26, 2014 by pady_1

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Regarding the fig. Name the parts and the organism

asked Mar 26, 2014 by pady_1

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Regarding the fig. identify 1,2,3 and 4:

asked Mar 26, 2014 by pady_1

1 answer

The bond length in the species $O_2,O_2^+$ and $O_2^-$ are in the order

asked Mar 26, 2014 by sreemathi.v

1 answer

Compressibility factor (Z) for $N_2$ at $-50^{\large\circ}C$ and 800atm pressure is 1.95. Calculate mole of $N_2$ gas required to fill a gas cylinder of 100mL capacity under the given conditions.

asked Mar 26, 2014 by sharmaaparna1

1 answer

Calculate molecular diameter of He from its Vander Waal's constant b = 24mL$mol^{-1}$

asked Mar 26, 2014 by sharmaaparna1

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The best vaccum so far attained in laboratory is $10^{-10}mm$ of Hg. How many molecules of gas remain per $cm^3$ at $20^{\large\circ}C$ in this vaccum?

asked Mar 26, 2014 by sharmaaparna1

1 answer

$O_2$ is collected over water at $20^{\large\circ}C$. The pressure inside shown by the gas is 740 mm of Hg. What is the pressure due to $O_2$ alone if V.P of $H_2O$ is 18 mm at $20^{\large\circ}C$

asked Mar 26, 2014 by sharmaaparna1

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50 litre of dry $N_2$ is passed through 36g $H_2O$ at $27^{\large\circ}C$. After passage of gas , there is a loss of 1.20g in water . Calculate vapour pressure of water.

asked Mar 26, 2014 by sharmaaparna1

1 answer

$O_2$ is present in one litre flask at a pressure of $7.6\times10^{-10}mm$ of Hg. Calculate the number of $O_2$ molecules at $0^{\large\circ}$C.

asked Mar 26, 2014 by sharmaaparna1

1 answer

A gas occupies one litre under atmosphere pressure. What will be the volume of the same amount of gas under 750mm of Hg at the same temperature?

asked Mar 26, 2014 by sharmaaparna1

1 answer

The radius of general equation of circle is

asked Mar 25, 2014 by balaji.thirumalai

1 answer

Reaction of cyclohexanone with dimethylamine in the presence of catalytic amount of an acid forms a compound X, if water during the reaction is continuously removed. The compound formed is generally known as

asked Mar 25, 2014 by thanvigandhi_1

1 answer

In the above sequence of reactions, A and B are

asked Mar 25, 2014 by thanvigandhi_1

1 answer

Ethyl isocyanide on acidic hydrolysis generates

asked Mar 25, 2014 by thanvigandhi_1

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A certain compound has the molecular formula $X_4O_6$.If 10.0g of compound contains 6.06g of X,the atomic mass of $X$ is

asked Mar 25, 2014 by sreemathi.v

1 answer

A solution contains $1.2046\times 10^{24}$ hydrochloric acid molecules in one $dm^3$ of the solution.The strength of the solution is

asked Mar 25, 2014 by sreemathi.v

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 Mar 25, 2014 by balaji.thirumalai

1 answer

The weight of one molecule of a compound $C_{60}H_{122}$ is

asked Mar 25, 2014 by sreemathi.v

1 answer

A fully charge capacitor of capacity $0.1\; \mu F$ is discharged through a resistor of resistance $10^6$ ohms. The time in which the potential falls to half its original value is $[\log_e2=0.6931]$

asked Mar 25, 2014 by meena.p

1 answer

The vapour pressure of pure liquid solvent A is 0.80atm.When a non volatile substance B is added to the solvent,its vapour pressure drops to 0.40atm,the mole fraction of component B in the solution is

asked Mar 25, 2014 by balaji.thirumalai

1 answer

A coil of inductance $L= 150\;mH$ and resistance $R= 70\;m \Omega$ is connected to a voltage source. How soon will the voltage attain $50\%$ of initial value

asked Mar 25, 2014 by meena.p

1 answer

A signature written with carbon pencil weighs 1mg.What is the number of carbon atoms present in signature?

asked Mar 25, 2014 by sreemathi.v

1 answer

A conducting rod of length $l=2\;cm$ moves with velocity 12 m/s at an angle $30^{\circ}$ to a magnetic field produced between two square faced poles of side 2 cm. If flux leaving the face is $5 \mu Wb$ the induces emf is

asked Mar 25, 2014 by meena.p

1 answer

In alkaline medium,$KMnO_4$ reacts as follows:$2KMnO_4+2KOH\rightarrow 2K_2MnO_4+H_2O+O$.Therefore,the equivalent weight of $KMnO_4$,will be

asked Mar 25, 2014 by sreemathi.v

1 answer

A 1200 turn coil of mean area $500 \;cm^2 $ is held perpendicular to a uniform field of $4 \times 10^{-4}$ tesla. The resistance of coil is $20 \Omega$ . What will be the average induced current when coil turns through $180^{\circ}$ in $0.1\;$second?

asked Mar 25, 2014 by meena.p

1 answer

A container of volume V contains 0.28g of $N_2$ gas.If the same volume of an unknown gas under similar conditions of temperature and pressure weighs 0.44g,the molecular mass of the gas is

asked Mar 25, 2014 by sreemathi.v

1 answer

Effective value of current is $5.0\;amp$ in a 50 cycle ac circuit. What is value of current $\large\frac{1}{300}\;$seconds after it is zero ?

asked Mar 25, 2014 by meena.p

1 answer

An LCR circuit has $L= 3.0 H, C= 27 \;\mu F$ and $ R= 7.4 \;\Omega$ with a certain a factor. To improve the sharpness of resonance by reducing its full width at half maximum by a factor of 2, with out changing $w_0$, we can

asked Mar 25, 2014 by meena.p

1 answer

If $N_A$ is the Avogadro's number then number of valence electrons in 4.2g of nitride ion($N^{3-})$ is

asked Mar 25, 2014 by sreemathi.v

1 answer

In an ac circuit with combination of L and C which one of following represents the variation of frequency f with reactance X?

asked Mar 25, 2014 by meena.p

1 answer

At STP ( standard temperature and pressure ) 40L of $CO_2$ contains

asked Mar 25, 2014 by sreemathi.v

1 answer

The equation of AC voltage is $E=220\; \sin (wt+\large\frac{\pi}{6})$ and AC current is $I= 10 \sin (wt+\large\frac{\pi}{6})$ The average power dissipated is

asked Mar 25, 2014 by meena.p

1 answer

If the Avogadro's number is $1\times 10^{23}$ mol$^{-1}$ then the mass of one atom of oxygen would be

asked Mar 25, 2014 by sreemathi.v

1 answer

A bulb is rated $100\;V,100\;W$ The inductance of an inductor that should be connected in series with the bulb to operate the bulb at rated power, with ac source $200 V, 50 \;Hz$

asked Mar 25, 2014 by meena.p

1 answer

Chemical reactions involve interaction of atoms and molecules.A large number of atoms/molecules are present in a few grams of any chemical compound varying with their atomic/molecular masses.To handle such large numbers conveniently,the mole concept was introduced.This concept has implications in diverse areas such as analytical chemistry,biochemistry,electrochemistry and radiochemistry.The following example illustrates a typical case involving chemical/electrochemical reaction.A H.O molar aqueous solution of NaCl is prepared and 500ml of this solution is electrolysed.This leads to the evolution of chlorine gas at one of the electrodes(atomic mass:Na=23,Hg=200;1 faraday=96500 coulombs).The total charge (coulombs) required for complete electrolysis is

asked Mar 25, 2014 by sreemathi.v

1 answer

Chemical reactions involve interaction of atoms and molecules.A large number of atoms/molecules are present in a few grams of any chemical compound varying with their atomic/molecular masses.To handle such large numbers conveniently,the mole concept was introduced.This concept has implications in diverse areas such as analytical chemistry,biochemistry,electrochemistry and radiochemistry.The following example illustrates a typical case involving chemical/electrochemical reaction.A H.O molar aqueous solution of NaCl is prepared and 500ml of this solution is electrolysed.This leads to the evolution of chlorine gas at one of the electrodes(atomic mass:Na=23,Hg=200;1 faraday=96500 coulombs).If the cathode is a Hg electrode,the maximum weight (g) of amalgam formed from this solution is

asked Mar 25, 2014 by sreemathi.v

1 answer

Chemical reactions involve interaction of atoms and molecules.A large number of atoms/molecules are present in a few grams of any chemical compound varying with their atomic/molecular masses.To handle such large numbers conveniently,the mole concept was introduced.This concept has implications in diverse areas such as analytical chemistry,biochemistry,electrochemistry and radiochemistry.The following example illustrates a typical case involving chemical/electrochemical reaction.A H.O molar aqueous solution of NaCl is prepared and 500ml of this solution is electrolysed.This leads to the evolution of chlorine gas at one of the electrodes(atomic mass:Na=23,Hg=200;1 faraday=96500 coulombs).The total number of moles of chlorine gas evolved is:

asked Mar 25, 2014 by sreemathi.v

1 answer

What volume of $CO_2$ will be liberated at NTP if 1.2g of carbon is burnt in excess of oxygen?

asked Mar 25, 2014 by sreemathi.v

1 answer

In the given circuit what will be reading of voltmeter.

asked Mar 25, 2014 by meena.p

1 answer

A LC circuit has a $10\;V,50\;Hz$ AC sources, A current of $1A$ flows in the circuit. The voltage leads by u phase angle of $\large\frac{\pi}{3}$ radians. The Value of resistance and inductive resistance are

asked Mar 25, 2014 by meena.p

1 answer

Find the sum of $n$ terms of the series whose $n^{th}$ term is given by $n^2+2^n$.

asked Mar 24, 2014 by rvidyagovindarajan_1

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Find the sum to $n$ terms of the series $1^2+(1^2+2^2)+(1^2+2^2+3^2)+........$

asked Mar 24, 2014 by rvidyagovindarajan_1

1 answer

Assigning funcitons to the sequences is called

asked Mar 24, 2014 by pady_1

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