List of practice Questions

Which of the following compounds do not have sp$^3$ carbon atom(s)?
I. Acetone\quad II. Acetic acid\quad III. Buta-1,3-diene\quad IV. Propyne\quad V. Naphthalene
The major product ‘B’ of the following reaction sequence is
major product ‘B’ of the following reaction sequence is
Among the ions O$^{2-}$, Na$^+$, F$^-$, N$^{3-}$, Mg$^{2+}$ the ions with smallest and largest radii are respectively
The ratio of rate of diffusion of SO$_2$ to CH$_4$ is
Which of the following does not show disproportionation reaction?
Which of the following conditions are not suitable for a spontaneous reaction?
For the formation of NH$_3$(g) from its constituent elements, which of the relation between the reaction quotient (Q) and equilibrium constant (K$_c$) is correct for the backward reaction?
Consider the following statements
Statement (A): The resistance of an ideal diode in forward biased condition is zero.
Statement (B): In a half wave rectifier, the load current flows only for every half cycle of the input signals.
Statement (C): In the breakdown region, a zener diode behaves as a constant voltage source.
The frequency band for uplink satellite communication in the following is
The ratio of radii of second orbit of hydrogen atom to fourth orbit of He$^+$ ion is
The velocity of the electron in Bohr’s first orbit is \( x \times 10^6 \, \text{ms}^{-1} \). The deBroglie wavelength associated with it (in nm) is (Given: \( m_e = 9 \times 10^{-31} \, \text{kg}, \, h = 6.6 \times 10^{-34} \, \text{Js} \))
The molecule which has more number of lone pair of electrons than the bond pair of electrons in its central atom is
Arrange the following in the correct order of their bond orders: N$_2$, O$_2$, O$_2^+$, O$_2^-$
The element with the electronic configuration [Kr]4d$^{10}$5s$^0$ is
The average number of photons emitted per second by a laser of power \(6.6 \times 10^{-3}\) W producing a light of wavelength 600 nm is (Planck’s constant, \(h = 6.6 \times 10^{-34}\) J·s)
A light from Paschen series of hydrogen atom is able to eject photoelectrons from a metal. Then the work function of the metal is
The average number of photons emitted per second by a laser of power \(6.6 \times 10^{-3}\) W producing a light of wavelength 600 nm is (Planck’s constant, \(h = 6.6 \times 10^{-34}\) J·s)
A light from Paschen series of hydrogen atom is able to eject photoelectrons from a metal. Then the work function of the metal is
The average number of photons emitted per second by a laser of power \(6.6 \times 10^{-3}\) W producing a light of wavelength 600 nm is (Planck’s constant, \(h = 6.6 \times 10^{-34}\) J·s)
A light from Paschen series of hydrogen atom is able to eject photoelectrons from a metal. Then the work function of the metal is
The correct statement of the following is
A long solenoid having 100 turns per cm carries a current of \(\frac{4}{\pi}\) A. At the centre of it is placed a coil of 200 turns of cross sectional area 25 cm\(^2\) having its axis parallel to the field produced by the solenoid. When the direction of the current in the solenoid is reversed within 0.04 s, the induced emf in the coil is
A particle of charge \(1.0 \times 10^{-16}\) C moves through a uniform magnetic field \(\vec{B} = B_0 (\hat{i} + 4\hat{j})\) T. The particle velocity at some instant is \(\vec{V} = (2\hat{i} + 4\hat{j})\) m/s and the magnetic force acting on it is \(3 \times 10^{-16}\) N. The magnitude of \(B_0\) is
A short bar magnet produces a magnetic field of \(6.4 \times 10^{-5}\) T at a distance of 20 cm from the center of the magnet on the normal bisector of the magnet. The magnetic field produced by this magnet at a distance of 40 cm on the axis is
A solenoid has the length 1 m and the area of cross section \(0.02\ \text{m}^2\). If no. of turns in the solenoid is 5000 then the self inductance of the solenoid is