Q1.Among the following graphs showing variation of rate constant with temperature (T) for a reaction, the one that exhibits Arrhenius behavior over the entire temperature range is
Answer : Option BExplaination / Solution:
k = A e –(Ea/RT)
ln k = ln A – (Ea/R)
(1/T)
this equation is in the
form of a straight line equatoion
y = c + m x
a plot of lnk vs 1/T is
a straight line with negative slope
Q2.An object is placed in front of a convex mirror
of focal length of f and the maximum
and minimum distance of an object from the mirror such that the image formed is
real and magnified.
Answer : Option DExplaination / Solution:
Since the nature of image produced by a convex mirror is always virtual, erect and diminished.
Q3.In a Young’s double-slit experiment, the slit separation is doubled. To maintain the same fringe spacing on the screen, the screen-to-slit distance D must be changed to,
Q8.The force experienced by a
particle having mass m and charge q accelerated through a potential difference
V when it is kept under perpendicular magnetic field is