List of practice Questions

The capacitance of a parallel plate capacitor is $5\,\mu F$. When a glass slab is placed between the plates of the capacitor, its potential difference reduces to $1/8$ of the original value. The thickness of the slab is equal to the separation between the plates. The value of the dielectric constant of glass is
The capacitance of a conductor in vacuum is $10\,F$. If it is put in a medium of relative permittivity $5$, the capacitance will be :
The Bronsted acid which gives the weakest conjugate base is
The Bt toxin is not toxic to human beings because
The breeding carried out between animals of different breeds is called
The breakdown in a reverse biased $p-n$ junction diode is more likely to occur due to
The breaking force for a wire of diameter D of a material is F. The breaking force for a wire of the same material of radius D is
The branch of optics dealing with the formation of images using the concept of straight line propagation of light is called:
The bond energy of an O - H bond is 109 k cal/mole. When a mole of water is formed then
The bond angle in $PH_3$ is close to
The bond between phosphate and hydroxyl group of sugar in nucleic acid is
The bond angle in $H_2S$ is
The boiling points of hydrides of group 16 are in the order
The blades of a windmill sweep out a circle of area $A$. If the wind flows at a velocity $v$ perpendicular to the circle, then the mass of the air of density $\rho$ passing through it in time $t$ is
The bleaching properties of $H_2O_2$ are due to its
The basicity of phosphorus acid is
The best method to prepare neopentyl chloride is
The binding energy of an electron in the ground state of He-atom is $E_0= 24.7e \,V$The energy required to remove both the electrons from the atom is
The bag $'A'$ contains $5$ white and $3$ black balls while the bag $'B'$ contains $4$ white and $7$ black balls. One of the bags is chosen at random and a ball is drawn from it. What is the probability that the ball is white?
The basic character of amines is because
The basic component of the smog is
The average self-induced emf in a 25mH solenoid when the current in it falls from 0.2 A to 0 A in 0.01 second, is
The average molecular speed is greatest in which of the following gas samples ?
The average depth of Indian ocean is about $3000\, m$. The fractional compression, $\frac{\Delta V}{V}$ of water at the bottom of the ocean is (Given : Bulk modulus of the water $= 2.2 ? 10^9 \,N \,m^{-2}$ and $g = 10 \,m\, s^{-2}$)
The atomicity of various noble gases is