Fechar
Which one of the following gives ketone on oxidation?
For a particle to be a colloid, its size must be...
What is the Kinetic energy of two moles of N at 27C?
heat treatment alters properties of steel due to?
Which of the transition element do not form amalgams?
Which is not an electrophile?
Total No. of spectral lines obtained in the visible region during the jump of e- from the fourth excited state of the hydrogen atom?
2C(s) + O2(g) -> CO(g). In the Ellingham diagram, the slope is downwards, this means...
The equation of normal to x=4secφ, y=3tanφ at φ =n/3
The equation of line parallel to x+4/-3 = y-4/2=z+1/3 and passing through (3,2,-6)
If z is a complex root of z²+z+1 then inverse of |1 z|
|0 z²|
Sum of 1+2/3+3/3²+4/3³+...
xi+3j-k, i+2j+3k and 3i+2k are coplanar. Find x
Area enclosed by y=lnx, y=0, and x=e is..
lim (x*2^x-x)/(1-cos2x) as x->0
In a capillary tube, the water rises to a height 1.2mm. The height of water in a tube of half the radius as that of the first one.
The value of tan^-1(1/2)+tan^-1(1/5)+tan^-1(1/9)
Suppose that each of n men at a party throws his hat into the center of the room. The hats are mixed up and then each man randomly selects a hat. What is the expected number of men who select their own hat?
If the slope of one of the lines represented by x²-5xy+4y²=0 is 1/4, then the slope of the other line is...
Toluene is more reactive than benzene due to..
Two resistances R1 and R2 are in series, while R3 and R4 are in parallel. If R1/R2=1/4, R3/R4=1/3 and Rs=Rp, then.
A flywheel of uniform mass 72 kg and radius 50cm. when it is rotating with 70 rpm, its KE is..
A line making a acute angle a with +ve x-axis passes through P(5,6) to meet line at x=6 at Q and y=9 at R, Then QR is given by...
if w is a non real cube root of unity what is w^40+1/w^40
A bar magnet when placed at an angle of 30 to the direction of the magnetic field induction of 4 x 10^-4 T, experiences a moment of couple 24x10^-6 Nm. The magnetic moment of bar magnet is
Diffraction effects are observed in day to day life with sound waves rather than light waves, this is because...
The Ellingham diagram of Al2O3 formation is lower than that of Cr2O3 formation
The effective atomic number of the central atom in the the complex [Fe(CO)3]
If the straight line 2x+3y+6=0 is a tangent to the parabola y²=4ax, then the value of a is..
The escape velocity from the earth’s surface is 11 km/sec. A certain planet has a radius twice that of the earth but its mean density is the same as that of the earth. The value of the escape velocity from this planet would be
If f(x)=ln(ln(x)), then f'(e)=..
The product of the perpendiculars from any point on 4x²-5y²=20 to its asymptotes is
Which of the following produce benzene from phenol?
If the two root of the eq, x³-px²+qx+r²=0, are equal in magnitude but opposite in sign, then
