The distance travelled by light in glass (refractive index =1.5) in a nanosecond will be
A plano convex lens is made refractive index 1.6. The radius of curvature of the curved surface is 60 cm. The focal length of the lens is
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When a glass prism of refracting angle 600 is immersed in a liquid its angle of minimum deviation is 300 . The critical angle of glass with respect to the liquid medium is
A man runs towards a mirror with a speed of 15 m-s-1. What is the speed of his image relative to the man is ?
When a beam of light is used to determine the position of an object, the maximum accuracy is achieved if the light is
The ether that undergoes electrophilic substitution reactions is
The standard E0red. values of A,B,C are 0.68V,- 2.54 V,-0.50V respectively.The order of their reducing power is
The quantity of electricity required to liberate 112 cm3 of hydrogen at STP from acidified water is
If the standard electrode potential of Cu2+/Cu electrode is 0.34 V, what is the electrode potential at 0.01 M concentration of Cu2+? (T = 298K)
On passing a current through KCl solution 19.5gm of potassium is deposited. If the same quantity of electricity is passed through a solution of aluminium chloride, the amount of Aluminium deposited is
White P when boiled with strong solution of caustic soda produces
The equation of the plane through intersection of planes x + 2y + 3z = 4 and 2x + y - z = -5 and perpendicular to the plane 5x + 3y + 6z + 8 = 0 is
If a line makes angles α,β,γ with the +ve direction of x,y and z axis respectively, then cos2α + cos2β + cos2γ
If the roots of the equation x2+2mx+m2 -2m+6=0 are equal, then the value of m is
The points (5,2,4),(6,-1,2) and (8,-7,k) are collinear if k is equal to
If α,β are the roots of the equation x2 - 2x + 4 = 0 then α5 + β5=
A tetrahedron has vertices at O (0, 0, 0), A(1, 2, 1), B(2, 1, 3) and C (-1, 1, 2). Then the angle between the faces OAB and ABC will be
The locus of the point of intersection of tangents to the circle x = a cos θ, y = a sin θ at the points, whose parametric angles differ by π/2 is