List of practice Questions

A prism with a refracting angle $30^{\circ}$, made of material of refractive index 1.732, has one of its faces silvered. A ray of light incident at a certain angle on the other face retraces the path after getting reflected at the silvered face. The angle of incidence is
As per Engler and Prantl's system of classification the family Musaceae is placed
Pouched mammals are known as
Transduction in bacteria was discovered by
A terminator codon which is called amber is
Which one among the following statements is not correct?
With reference to the external features of Cockroach, which among the following statements is not correct
Which of the following is pheromone?
Which of the following enzymes is present in animals like cow, buffaloes, etc. to digest compound like paper, cloth, etc.?
Two trains are moving towards each other with speeds of 20 m/s and 15 m/s relative to the ground. The first train sounds a whistle of frequency 600 Hz, the frequency of the whistle heard by a passenger in the second train before the train meeets is (the speed of sound in air is 340 m/s)
Power supplied to a particle of mass 2 kg varies with time as $ P=\frac{3{{t}^{2}}}{2}W. $ Here t is in second. If velocity of particle at $ t=0 $ is $ v=0, $ the velocity of particle at time $ t=2\,s $ will be
Which one of the following represents the correct ratio of the energy of electron in ground state of $H$ atom to that of the electron in the first excited state of $Li^{+}$ ?
A pulley fixed to the ceiling carries a string with blocks of masses $m$ and $3m$ attached to its ends. The masses of string and pulley are negligible. When the system is released, the acceleration of centre of mass will be
The charge flowing in a conductor varies with time as $ Q=at-b{{t}^{2}}, $ then the current changes at the rate of $ (-2b) $ falls to zero after $ T=\left( \frac{a}{2b} \right) $ (3) reaches a maximum and then decreases (4) will remain constant
A wooden block of mass $M$ resting on a rough horizontal surface is pulled with a force $F$ at an angle with the horizontal. If $ \mu $ is the coefficient of kinetic friction between the block and the surface, then acceleration of the block is
Which of the following is not considered as a mutagen
Which of the following is related to humoral immunity ?
Which of the following is the subaerial stem modification with long inter mode
Which of the following tissues is most abundant and forms most of the body parts?
Which one of the following cells is not a phagocytic cell
Which one of the following animal phyla does not possess a coelom
Which one of the following has the lowest ionization energy?
Which one of the following is an exotic carp species
Which one of the following is an exception to cell theory?
Which one of the following is a primary consumer