List of practice Questions

An insect crawls up a hemispherical surface very slowly. The coefficient of friction between the insect and the surface is 1/3. If the line joining the centre of the hemispherical surface to the insect makes an angle a with the vertical, the maximum possible value of a so that the insect does not slip is given by
Bacterial/prokaryotic ribosome is
Smooth endoplastic reticulum (SER) is mostly concerned with
Guttation differs from transpiration in
Surrounding membrane of vacuole is called
An example of semidwarf variety of wheat is
Lichens are composite organisms consisting of an alga and
Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy?
An artificial satellite moving in a circular orbit around the earth has a total (kinetic $+$ potential) energy $E_0$. Its potential energy is
What is the correct relationship between the $pHs$ of isomolar solutions of sodium oxide $(pH_1)$, sodium sulphide $(pH_2)$, sodium selenide $(pH_3)$ and sodium telluride $(pH_4)$?
The aqueous solution containing which one of the following ions will be colourless? (Atomic number of $Sc = 21, Fe = 26, Ti = 22, Mn = 25$)
Freon used as refrigerant is
Of the following, the oxime of which shows geometrical isomerism is
Which has the highest nucleophilicity?
The reduction potential at $pH = 14$ for the $Cu^{2+} /Cu$ couples is [ Given , $E^{\circ}_{Cu^{2+}}/Cu = 0.34 \,V; K_{sp} Cu(OH)_2 = 1\times 10^{-19}$
Amylopectin is a polymer of
Among the following which is the best description of water in the solid phase?
Among the following species which two have trigonal pyramidal shape? $\left(I\right)NI_{3}\left(II\right)I^{-}_{3}$ $\left(III\right)SO^{2-}_{3}\left(IV\right)NO^{-}_{3}$
Maximum cranial capacity was in
According to Freundlich adsorption isotherm which of the following is correct?
Which of the following induces parturition?
The source of taq polymerase used in PCR is a
Abscisic acid is known as the stress hormone because it
Stomatal opening is affected by
Which one contains unicellular eukaryotes