List of practice Questions

The term biomagnification refers to
The $t_{\frac{1}{2}}$ for a zero order reaction at the initial concentration of 6x 10M is one minute at $27^{\circ}C$. The rate constant at $27^{\circ}C$ in mol $dm^{-3}s^{-1}$ is
The sound producing organ of bird is called as
The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as
The roots hanging from the branches of banyan tree are
The release of sperms from the seminiferous tubules is called
The radiation corresponding to $3\rightarrow2$ transition of hydrogen atom falls on a metal surface to produce photoelectrons. These electrons are made to enter a magnetic field of $3\times10^{-4}$T. If the radius of the largest circular path followed by these electrons is 10.0 mm, the work function of the metal is close to
The process of converting hydrated alumina into anhydrous alumina is called
The period number in the long form of the periodic table is equal to
The oscillation of a body on a smooth horizontal surface is represented by the equation, $ X = A \cos \, ( \omega \, t)$ where X = displacement at time t $ \omega$ = frequency of oscillation Which one of the following graphs shows correctly the variation a with $t$ ?
The middle lamella is composed of
The $KE$ of the electron in an orbit of radius $r$ in hydrogen atom is ($e$ = electronic charge)
The initial step in the digestion of milk in humans is carried out by ?
The formula of azurite is
The force between two parallel current carrying wires is independent of
The first recombinant DNA was constructed by linking an antibiotic resistant gene with the native plasmid of
The first human hormone produced by recombinant DNA technology is
The enzyme recombinase is required at which stage of meiosis?
The entropy change involved in the isothermal reversible expansion of $2$ moles of an ideal gas from a volume of $10\, dm ^{3}$ at $27^{\circ} C$ is to a volume of $100\, dm ^{3}$
The diameter of the plate of a parallel plate condenser is $6\,cm$. If its capacity is equal to that of a sphere of diameter $200\, cm$, the separation between the plates of the condenser is
The $C_{4}$ plants differ from $C_{3}$ plants with reference to the
The boiling point of $p$-nitrophenol is higher than that of $o$-nitrophenol because
Strongest conjugate base is
Spiral or ribbon shaped chloroplast is present in
Select the correct statement: