List of top Questions asked in AIIMS

$K_a$ for $HCN$ is $5 \times 10^{-10}$ at $25^{\circ}C$. For maintaining a constant $pH\, = \,9$, the volume of $5\, M \,KCN$ solution required to be added to $10 \,mL$ of $2\, M HCN$ solution is
The figure shows a horizontal force $ \vec{F}$ acting on a block of mass M on an inclined plane (angle $\theta$). What is the normal reaction $N$ on the block?
Which of the following oxoacids of phosphorus is a reducing agent and a monobasic acid as well?
Which one of the following is a correct statement?
Which part of the nephron is impermeable to water?
$ZnO$ is white when cold and yellow when heated. It is due to the development of
What is the name of the following reaction? $ {PhCHO + (CH3CO)2O ->[Na(OAc)_2] PhCH=CHCO2H}$
What is the correct order of basicity among the following compounds ?
The change in the gravitational potential energy when a body of mass $m$ is raised to a height $nR$ above the surface of the earth is (here $R$ is the radius of the earth)
(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 $2.1 \times 10^{13}$.
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.
Yeasts are unicellular fungi that are used in bakery and brewery industries. Potato spindle tuber disease is caused by viroids.
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.