List of top Questions asked in AIIMS

(R)-2-Iodobutane is treated with $NaI$ in acetone and allowed to stand for a long time. The product eventually formed is
Pick the correct group consisting of all genera exhibiting homospory.
Ionisation potential of hydrogen atom is 13.6 eV. Hydrogen atom in ground state is excited by monochromatic light of energy 12.1 eV. The spectral lines emitted by hydrogen according to Bohr?? theory will be
Identify the accurate explanation of mesosome. It is
Consider the following set of reactions : $ {CH3COOH ->[SOCl_2] A}$$ { ->[Benzene][Anhyd. AlCl_3] B}$$ { ->[HCN] C}$$ { ->[HOH] D}$ The structure of D would be
Calculate the overall complex dissociation equilibrium constant for the $[Cu(NH_3)_4]^{2+}$ ions, given that stability constant ($\beta$) for this complex is $2.1 \times 10^{13}$.
Yeasts are unicellular fungi that are used in bakery and brewery industries. Potato spindle tuber disease is caused by viroids.
XX-XY type of sex determination mechanism is an example of female heterogamety and is found in Drosophila. Male heterogamety is seen in moths where males produce two different types of gamete.
Two point coherent sources of light S and S are placed on a line as shown. P and Q are two points on that line. If at point P maximum intensity is observed then maximum intensity should also be observed at In the figure of assertion the distance $\left|S_{1}P-S_{2}P\right|$ is equal to distance $\left|S_{2}Q-S_{1}Q\right|$.
trans-Pent-2-ene is polar but trans- but-2-ene is non-polar. The polarity of cis-isomer is more than trans-isomer, which are either non-polar or less polar.
The number of tetrahedral voids is double the number of octahedral voids. The size of the tetrahedral voids is half of that of the octahedral void.
Restriction enzymes cut the strand of DNA to produce sticky ends. Stickiness of the ends facilitates the action of the enzyme DNA polymerase.
Pseudo force is an imaginary force which is recognised only by a non-inertial observer to explain the physical situation according to Newton?? laws. Pseudo force has no physical origin, i.e., it is not caused by one of the basic interactions in nature. It does not exist in the action-reaction pair.
Photorespiration is a wasteful process where there is no synthesis of ATP energy. RuBisCO is present in mesophyll cells of C plants hence they show more productivity.
Hydrides of group-16 elements show volatility in the order : $H_2O > H_2S > H_2Se > H_2Te$ Electronegativity of group-16 elements increases down the group from oxygen to tellurium.
Flavr-Savr tomato was the first transgenic commercial crop that entered the market. Roundup variety of soybean was prepared through breeding.
$[Fe(CN)_6]^{3-}$ has $d^2sp^3$ type hybridisation. $[Fe(CN)_6]^{3-}$ ion shows magnetic moment corresponding to two unpaired electrons.
Cephalisation is advantageous to an animal. Cephalisation improves the appearance of an animal.
Aromatic aldehydes and formaldehyde undergo Cannizzaro reaction. Aromatic aldehydes are almost as reactive as formaldehyde.
An n-type semiconductor has a large number of electrons but still it is electrically neutral. An n-type semiconductor is obtained by doping an intrinsic semiconductor with a pentavalent impurity.
A solid sphere is rolling on a rough horizontal surface. Acceleration of contact point is zero. A solid sphere can roll on the smooth surface.
An artificial pacemaker is implanted subcutaneously and connected to the heart in patients
Which of the following compounds is aromatic in nature?
$H_2O$ is polar, whereas $BeF_2$ is not because
On the basis of standard electrode potential of redox couples given below, find out which of the following is the strongest oxidising agent. (E$^{\circ}$ values : $Fe^{3+}\left| Fe^{2+}=+ 0.77 V ; I_{2\left(s\right)}\right|I^{- } =$ $+ 0.54 V; Cu^{2+}\left|Cu= + .34 V ; Ag^{+}\right| Ag = + 0.80 V$)