List of top Questions asked in KCET

A metal exists as an oxide with formula M0.96​O. Metal M can exist as M+2 and M+3 in its oxide M0.96​O. The percentage of M+3 in the oxide is nearly
Which of the following is Not a green house gas?
Identify ‘X’ in the following reaction
Identify X in the following reaction
Which of the following is not a pair of functional isomers?
The mental that produces H2 with both dil HC/ and NaOH (aq) is
The oxide of potassium that does not exist is
The percentage s-character of the hybrid orbitals in\( No^+_2\), \(NO^-_3\) and\( NH^+_4\) respectively are
A Lewis acid 'X' formed by the reaction of BF3 with LiA/H4 in ether medium to gives a highly toxic gas. This gas when heated with NH3 gives a compound commonly known as inorganic benzene. The gas is
The oxidation number of nitrogen atom in MH4NO3 are
When the same quantity of heat is absorbed by a system at two different temperatures T1​ and T2​, such that T1​>T2​, change in entropies are ΔS1​ and ΔS2​ respectively. Then
The formal charge on central oxygen atom in ozone is
A thin uniform rectangular plate of mass 2 kg is placed in X-Y plane as shown in figure. The moment of inertial about x-axis is Ix = 0.2 kg m2 and the moment of inertia about y-axis is Iy = 0.3 kg m2. The radius of gyration of the plate about the axis passing through O and perpendicular to the plane of the plate is
A thin uniform rectangular plate of mass 2 kg
A body is initially at rest. It undergoes one-dimensional motion with constant acceleration. The power delivered to it at time ‘t’ is proportional to
One end of a string of length ‘ l ’ is connected to a particle of mass ‘m’ and the other to a small peg on a smooth horizontal table. If the particle moves in a circle with speed ‘v’, the net force on the particle (directed towards the centre) is : (T is the tension in the string)
Rain is falling vertically with a speed of 12 ms-1. A woman rides a bicycles with a speed of 12 ms-1 in east to west direction. What is the direction in which she should hold her umbrella ?
At a metro station, a girl walks up a stationary escalator in 20 sec. If she remains stationary on the escalator, then the escalator take her up in 30 sec. The time taken by her to walk up on the moving escalator will be
A cylindrical wire has a mass(0.3 ± 0.003)g, radius (0.5 ± 0.005)mm and length (6 ± 0.06)cm. The maximum percentage error in the measurement of its density is
Two long straight parallel wires are a distance 2 d part. They carry steady equal currents flowing out of the plane of the paper. The variation of magnetic field B along the line xx’ is given by
A positive hole in a semiconductor is
In the following circuit what are P and Q :
Electric Circuits
A 220 V A.C supply is connected between points A and B as shown in figure what will be the potential difference V across the capacitor?
A.C supply is connected between points A and B
Angular momentum of an electron in hydrogen atom is \(\frac{3h}{2\pi}\) (h is the Planck’s constant). The K.E. of the electron is
A radio-active elements has half-life of 15 years. What is the fraction that will decay in 30 years?
During a β- decay
Two protons are kept at a separation of 10 nm. Let Fn and Fe the nuclear force and the electromagnetic force between them