List of practice Questions

The structure and hybridisation of $Si(CH_3)_4$ is
In a reversible reaction, the energy of activation of the forward reaction is 50 kcal. The energy of activation for the reverse reaction will be
Which one of the following ions will be smallest in size?
A \(10\ eV\) electron is circulating in a plane at right angles to a uniform field at magnetic induction \({10}^{- 4}\ Wb/m^2\) (= \(1.0\) gauss), the orbital radius of electron is
The energy stored in a capacitor of capacity C and potential V is given by
A body dropped from a height h with initial velocity zero, strikes the ground with a velocity 3 m/s. Another body of same mass dropped from the same height h with an initial velocity of 4 m/s. The final velocity of second mass, with which it strikes the ground is
The enzymes hexokinase which catalyses glucose to glucose-6- phosphate in glycolysis is inhibited by glucose-6-phosphate. This is an example of
The 'niche' of a species is meant for
The role of double fertilization in angiosperms is to produce
Process by which water enters in the roots due to diffusion, is termed as
Lampbrush chromosomes occur during
The given reaction, $ {2FeCl3 + SnCl2 -> 2FeCl2 + SnCl4}$ is an example of
The smallest plant family 'Gymnosperm' has how many species?
At the end of glycolysis, six carbon compound ultimately changes into
The interferons are
The nephridia in earthworm are analogous to
The correct order of $ N - O $ bond lengths in $NO, NO_2^-, NO_3^- $ and $ N_2O_4 $ is
The oxidation of toluene to benzaldehyde by chromyl chloride is called
If a convex lens of focal length 80 cm and a concave lens of focal length 50 cm are combined together, what will be their resulting power?
The dimensions of impulse are equal to that of
Colchicine is employed to diploidize a haploid cell as it
A beam of electrons is moving with constant velocity in a region having electric and magnetic fields of strength $ 20 V m^{-1} $ and 0.5 T at right angles to the direction of motion of the electrons. What is the velocity of the electrons?
Which of the following dimensions will be the same as that of time?
The IUPAC name of is
The correct sequence for the manufacture of the compounds on the primitive earth is