Recent questions tagged 2011

The number of radial nodes present in the radial probability distribution curves for the orbital wave function with quantum numbers $n=4,l=0$ and $m=0$ is:

asked Sep 25, 2013 by meena.p

1 answer

Which one of the following is a food preservative?

asked Sep 25, 2013 by meena.p

1 answer

Scurvy is caused by the deficiency of which vitamin?

asked Sep 25, 2013 by meena.p

1 answer

Proteins are:

asked Sep 25, 2013 by meena.p

1 answer

Carbylamine test is used to detect which one of the following?

asked Sep 25, 2013 by meena.p

0 answers

Identify X in the following :

asked Sep 25, 2013 by meena.p

1 answer

Which component is formed when a mixture of calcium acetate and calcium formate is heated?

asked Sep 25, 2013 by meena.p

1 answer

Assertion (A): Ethanol boils at lower temperature than ethane. Reason (R): The molecular weight of ethanol is higher than that of ethane.

asked Sep 25, 2013 by meena.p

1 answer

Refer the below equation:

asked Sep 25, 2013 by meena.p

1 answer

The number of stereo isomers possible for $H_3C-CH(OH)-CH(OH)-CH_3$ is :

asked Sep 25, 2013 by meena.p

1 answer

Which one of the following does not give precipitate with ammonical cuprous chloride?

asked Sep 25, 2013 by meena.p

1 answer

Which one of the following alkenes gives only ethanal on ozonolysis?

asked Sep 25, 2013 by meena.p

1 answer

The reagent used to detect phosphorous in an organic compound is :

asked Sep 25, 2013 by meena.p

1 answer

Which one of the following is not a green - house gas?

asked Sep 25, 2013 by meena.p

1 answer

Which of the following metallurgical processes does not involve heating?

asked Sep 25, 2013 by meena.p

1 answer

The solution of $X$ having excess of caustic potash is used to detect ammonia. Which of the following is $X$?

asked Sep 25, 2013 by meena.p

1 answer

A mixture of $He,Ne,Kr$ and $Xe$ is cooled. Which one of them condenses first?

asked Sep 25, 2013 by meena.p

1 answer

Bond energy of $F_2,Cl_2$ and $Br_2$ follow the order:

asked Sep 25, 2013 by meena.p

1 answer

Electronegativity of group 13 elements follow the order:

asked Sep 25, 2013 by meena.p

1 answer

Which of the following statement are correct?

asked Sep 25, 2013 by meena.p

1 answer

The gases evolved in the decomposition of lead nitrate are:

asked Sep 25, 2013 by meena.p

1 answer

What is the empirical formula of sheet silicates ?

asked Sep 25, 2013 by meena.p

1 answer

The relative of $Ca,Sr,Mg$ and $Ba$ with water follow the order:

asked Sep 25, 2013 by meena.p

1 answer

Calcium carbide is hydrolyzed using heavy water. What are the products formed?

asked Sep 25, 2013 by meena.p

1 answer

According to Langmuir adsorption isotherm, the amount of gas absorbed by unit surface area is : (a,b,,k and n are constants; P=pressure of gas)

asked Sep 25, 2013 by meena.p

1 answer

Which one of the following pairs represents the intensive properties ?

asked Sep 25, 2013 by meena.p

1 answer

The order of $pH$ of $0.200\;M$ solutions of $NH_4NO_3,Na_2CO_3$ is:

asked Sep 25, 2013 by meena.p

1 answer

At $T(k),$ the partial pressures of $SO_2,O_2$ and $SO_3$ are $0.662,0.100$ and $0.331$ atm. respectively for the reaction $ 2 S0_2+O_2 \to 2 SO_3$ at equilibrium . What is the partial pressure in atm. of $O_2$ when the equilibrium partial pressures of $SO_2$ and $SO_3$ are equal at the same temperature?

asked Sep 25, 2013 by meena.p

1 answer

Match the following:

asked Sep 25, 2013 by meena.p

1 answer

In electro chemical corrosion, the metal undergoing corrosion :

asked Sep 25, 2013 by meena.p

1 answer

If the length of the unit cell is 5 A, the smallest distance in A between the two neighboring metal atoms in a face center cubic lattice is :

asked Sep 25, 2013 by meena.p

1 answer

For the electro chemical cell $ M | M^{+} || X^{-} | X, E^{0}(M^{+} | M)=0.44\;V$ and $E^{0} (X | X ^{-})=0.33\;V.$ Which one of the following is true for this data?

asked Sep 25, 2013 by meena.p

0 answers

A solution of 10 g of non-volatile binary electrolyte (mol wt=100) in 500 g of water freezes at $-0.74^{\circ}C$. What is the degree of ionisation ? ($k_f$ of water$=1.85\;K \; molality^{-1})$

asked Sep 25, 2013 by meena.p

1 answer

In acidic medium, $100\; ml$ of $0.01\;M\;KMnO_4$ solution oxides $100\;ml$ of $H_2O_2$ solution. The volume of $0.01\;M\;KMnO_4$ required to oxidize the same volume of $H_2O_2$ in alkaline medium in ml. is :

asked Sep 25, 2013 by meena.p

1 answer

Which one of the following statement is not correct?

asked Sep 25, 2013 by meena.p

1 answer

A metal nitride contains $28 \%$ nitrogen by weight. The molecular formula of metal nitride is $M_3N_2$. What is the atomic weight of metal?

asked Sep 24, 2013 by meena.p

1 answer

The sensitivity of a galvanometer is $60$ divisions /Amp. When a shunt is used, its sensitivity become 10 divisions/Amp. If the galvanometer is of resistance $20 \Omega$, the value of shunt used is :

asked Sep 24, 2013 by meena.p

1 answer

A constant voltage of $25\; V$ is applied to a series $L-R$ circuit at $t=0$, by closing a switch. What is the potential difference across the resistor and the inductor at time $t=0$?

asked Sep 24, 2013 by meena.p

1 answer

Match the following and find the correct pairs:

asked Sep 24, 2013 by meena.p

1 answer

The thermo e.m of a hypothetical thermocouple varies with the temperature $\theta$ of hot junction as $E= a \theta + b \theta^2$ in volts, where the ratio $a/b$ is $700^{\circ}C$. If the cold junction is kept at $0^{\circ}C,$ then the neutral temperature is :

asked Sep 24, 2013 by meena.p

1 answer

Int he circuit shown below, the ammeter reading is zero. Then the value of the resistance $R$ is :

asked Sep 24, 2013 by meena.p

1 answer

The electric current i in the circuit shown is :

asked Sep 24, 2013 by meena.p

1 answer

Two identical condenser M and N are connected in series with a battery. The space between the plates of M is completely filled with a dielectric medium of dielectric constant 8 and a copper plate of thickness $\large\frac{d}{2}$ is introduced between the plates of N. (d is the distance between the plates). Then potential differences across M and N are, respectively , in the ratio:

asked Sep 24, 2013 by meena.p

1 answer

A fully charged capacitor has a capacitance $'C'$. It is discharged through a small coil resistance wire, embedded in a block of specific heat $'s'$ and mass $'m'$ under thermally isolated conditions. If the temperature of the block is raised by $'\Delta T$, the potential difference $V$ across the capacitor initially is :

asked Sep 24, 2013 by meena.p

1 answer

Some physical quantities are given in the List I and the related units are given in the List II.Match the correct pairs in the list:

asked Sep 24, 2013 by meena.p

1 answer

If a bar magnet of pole strength $m$ and magnetic moment M is cut equally 5 times parallel to its axis and again 3 times perpendicular to its axis, then the pole strength and magnetic moment of each piece are respectively:

asked Sep 24, 2013 by meena.p

1 answer

In the Young's double slit experiment, the resultant intensity at a point on the screen is $75 \%$ of the maximum intensity of the bright fringe. Then the phase difference between the two interfering rays at that point is :

asked Sep 24, 2013 by meena.p

1 answer

A ray of light refracts from medium 1 into a thin layer of medium 2, crosses the layer and is incident at the critical angle on the interface between the medium 2 and 3 as shown in figure. If the angle of incidence of ray is $\theta$, the value of $\theta$ is :

asked Sep 24, 2013 by meena.p

3 answers

Which of the following statement are $true$ in the context of a Compound Microscope?

asked Sep 24, 2013 by meena.p

1 answer

The focal length of a lens of dispersive power $0.45$ which should be placed in contact with a convex lens of focal length $84\;cm$ and dispersive power $0.21$ to make the achromatic combination from the two lenses, in cm is :

asked Sep 24, 2013 by meena.p

2 answers

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