List of top Questions asked in KCET- 2018

First overtone frequency of a closed pipe of length $'l_1'$ is equal to the $2^{nd}$ harmonic frequency of an open pipe of length $'l_2'$ .The ratio $\frac{l_1}{l_2} = $
The work done to move a charge on an equipotential surface is
Two capacitors of $3 \, \mu F$ and $6 \, \mu F$ are connected in series and a potential difference of 900 V is applied across the combination. They are then disconnected and reconnected in parallel. The potential difference across the combination is
The locus represented by $xy + yz = 0$ is
The probability of happening of an event A is 0.5 and the of B is 0.3 .If A and B are mutually exclusive events, then the probability of neither A nor B is
Electrolytic refining is used to purify which of the following metals ?
For the reaction, $2SO_2 + O_2 <=> 2SO_3, $ the rate of disappearance of $O_2$ is $2 \times 10^{-4} \, mol \, L^{-1} \, s^{-1}$ . The rate of of appearance of $SO_3$ is
The relationship between $K_p$ and $K_c$ is $K_p=K_c (RT)^{\Delta n}$ What would be the value of $\Delta n$ for the reaction : $NH_4Cl_{(s)} <=> NH3_{(g)} +HCl_{(g)}$ ?
The equation of the line parallel to the line $3x - 4y + 2 = 0 $ and passing through $(-2, 3 )$ is
The breeding technique that is useful to expose harmful recessive genes is
In malignant tumors, the cells divide rapidly and move to distant parts of the body and cause new tumors. This property is called
During the fusion of organic compound with sodium metal, nitrogen present in the organic compound is converted into
The magnitude of point charge due to which the electric field 30 cm away has the magnitude ,$2 \, NC^{-1}$ will be
The common impurity present in bauxite is
Tertiary alkyl halide is practically inert to substitution by $S_N2$ mechanism because of
Snow blindness is caused due to
For a cell reaction involving two electron changes, ${E^{\circ}_{cell} = 0.3 \, V}$ at $ 25^{\circ} C$. The equilibrium constant of the reaction is
An object is placed at a distance of 20 cm from the pole of a concave mirror of focal length 10 cm. The distance of the image formed is
A step-up transformer operates on a 230 V line and a load current of 2 A. The ratio of primary and secondary windings is 1 : 25. Then the current in the primary is
A man weighing 60 kg is in a lift moving down with an acceleration of $1.8 \, ms^{-2}$. The force exerted by the floor on him is
A jet plane having a wing-span of 25 m is travelling horizontally towards east with a speed of 3600 km/hour. If the Earth?s magnetic field at the location is $4 \times 10^{-4} \, T$ and the angle of dip is $30^{\circ}$, then, the potential difference between the ends of the wing is
A cyclotron?s oscillator frequency is 10 MHz and the operating magnetic field is 0.66 T. If the radius of its dees is 60 cm, then the kinetic energy of the proton beam produced by the accelerator is
A space station is at a height equal to the radius of the Earth. If $'v_E'$ is the escape velocity on the surface of the Earth, the same on the space station is ....... times $v_E$.
The radius of the Earth is 6400 km. If the height of an antenna is 500 m, then its range is
For an ideal gas, compressibility factor is