List of practice Questions

In a terrestrial ecosystem, detritus food chain is the major conduit for energy flow. Solar energy is the direct source for energy supply in a detritus food chain.
Histones are basic protein of major importance in packaging of eukaryotic $DNA. DNA$ and histone comprise chromatine forming bulk of eukaryotic chromosome. Histones are five major types $H_{l},\, H_{2}A,\, H_{2}B,\, H_{3}\, and\, H_{4}$.
HC $=$ C$^{-}$ is more stable than HC $=$ CH$^{-}$. HC $=$ C$^{-}$ has more s-character than HC $=$ CH$^{-}$.
$H_2Se$ is less acidic than $H_2S$. $S$ is less electronegative than $Se$.
$[Fe(H_2O)_5NO]SO_4$ is paramagnetic. The $Fe$ in $[Fe(H_2O)_5NO]SO_4$ has three unpaired electrons.
Diamond and graphite do not have the same crystal structure. Diamond is crystalline while graphite is amorphous.
$ClF_3$ has T-shape structure. It has two lone pairs arranged at 180$^{\circ}$ angle.
$BF_3$ molecule is planar but $NF_3$ is pyramidal. N atom is smaller than B.
AIDS is caused by the HIV, a retrovirus. Retroviruses have RNA genome.
Which of the following is not a peroxy acid?
Aspirin is known as :
Apiculture is associated with which of the following groups of plants?
Antiserum contain
An object $2.4\, m$ in front of a lens forms a sharp image on a film $12\, cm$ behind the lens. A glass plate $1\, cm$ thick, of refractive index $1.50$ is interposed between lens and film with its plane faces parallel to film. At what distance (from lens) should object shifted to be in sharp focus on film ?
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 $Sc = 21, Fe = 26, Ti = 22, Mn = 25$)