List of top Questions asked in KCET

Smallest among these species is
The light reflected by a plane mirror may form a real image
When one of the slits of Young's experiment is covered with a transparent sheet of thickness 4.8 mm, the central fringe shifts to a position originally occupied by the 30th bright fringe. What should be the thickness of the sheet if the central fringe has to shift to the position occupied by 20th bright fringe ?
The de Broglie wavelength of an electron in the first Bohr orbit is
A magnet is dropped down an infinitely long vertical copper tube. Then
Light appears to travel in straight line because
Which of the following compounds on boiling with $KMnO_4 $(alk.) and subsequent acidification will not give benzoic acid ?
Grignard reagent is not prepared in aqueous medium but it is prepared in ether medium because
A sine wave has an amplitude A and wavelength $\lambda$ . Let V be the wave velocity and maximum velocity of a particle in the medium. Then
Phenol is treated with bromine water and shaken well to get white precipitate. The white precipitate is
The magnetic fields at two points on the axis of a circular coil at distance of 0.05 m and 0.2 m from the centre are in the ratio 8 :1 . The radius of the coil is
A balloon rises from ground with an acceleration of $1.25\, m s^{-2}$. After $8s$ a stone is released from balloon. The stone will
During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio $C_p / C_v$ for the gas is
A $20 \,cm$ length of a certain solution causes right-handed rotation of $38^\circ$. A $30\, cm$ length of another solution causes left-handed rotation of $24^\circ$. The optical rotation caused by $30\, cm$ length of a mixture of the above solutions in the volume ratio $1 : 2$ is
An electron in hydrogen atom makes a transition $n_1 \rightarrow n_2$ where $n_1$, and $n_2$ are principal quantum numbers of the two states. Assuming Bohr?? model to be valid, the time period of the electron in the initial state is eight times that in the final state. The possible
$P_4O_{10}$ is not used to dry $NH_3$ gas because
The quantity of electricity required to liberate $112\,cc$ of hydrogen at STP from acidified water is
A milliammeter of range 10 mA has a coil of resistance $1\Omega$. To use it as a voltmeter of range 10 V, the resistance that must be connected in series with it is
While a capacitor remains connected to a battery, a dielectric slab is slipped between the plates.
The resultant of two forces $3\,P$ and $2\,P$ is $R$. If the first force is doubled, then the resultant is also doubled. The angle between the two forces is
If white light is used in Young's double-slit experiment,
Which one of the following metallic hydroxides does not dissolve in sodium hydroxide solution ?
In the circuit shown in figure, neglecting source resistance, the voltmeter and ammeter readings will respectively be
At what temperature will the r.m.s. velocity of $SO_2$ be the same as that of $O_2$ at 303 K ?
In the experiment of diffraction at a single slit, if the slit width is decreased, the width of the central maximum