List of top Questions asked in COMEDK UGET- 2009

Two rods of same area of cross section and lengths, and conductivities $K_1$ and $K_2$ are connected in series. Then, in steady state conductivity of the combination is
Dielectric constant of a metal is
If the Earth shrinks in its size (radius) mass remaining the same, the value of g on its surface will
$\cos^2 \frac{\pi}{12} + \cos^2 \frac{\pi}{4} \cos^2 \frac{5 \pi}{12} = $
$_6C^{14}$ and $7_N^{15}$ are examples of
A stone dropped from the top of a tower reaches ground in 4 s. Height of the tower is $(g = 10 \, m/s^2)$
In the group $\{1, 2, 3, 4, 5, 6\}$ under multiplication mod $7, 2^{-1} \times 4 =$
If only 2% of the main current is to be passed through a galvanometer of resistance G, the resistance of shunt should be
In the detection of III group basic radicals, $ {NH4OH}$ is added after $ {NH_4Cl}$ to
In the titration of Mohr's salt against $ {KMnO_4}$ the indicator used is
Lysine is
The value of $\int \frac{10^{x/2}}{\sqrt{10^{-x} - 10^{x}}}dx$ is
With the addition of impurities surface tension of a liquid
The square of the resultant of two equal forces acting at a point is equal to three times their product. Angle between them is
A calcite crystal is placed over a dot on a paper sheet and the crystal is rotated. On viewing through the calcite one sees
Electrolysis of brine gives a mixture of
$n $ type and $p$ type semiconductors can be obtained by doping pure silicon respectively with
Potential energy of two charges $10 \, nC$ each separated by a distance of 0.09 m in air is
Viscosity decreases with increase in temperature is the reason for (i) hot water moving faster than cold water (ii) more viscous oils are used in motor cars during summer than in winter
The standard temperature used in thermo- chemical calculations is
Which of the following is an intensive property?
A reaction is spontaneous at all temperatures when
Highest osmotic pressure is shown by a solution of
In benzene, each carbon atom undergoes
Quality factor of a series $LCR$ circuit decreases from 3 to 2. Resonant frequency is $600 \, Hz$. Change in band width is