List of top Questions asked in AIIMS, DUET

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?
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 : $Fe^{3+}\left| Fe^{2+}=+ 0.77 V ; I_{2\left(s\right)}\right|I^{- } =$ $+ 0.54 V; Cu^{2+}\left|Cu= + .34 V ; Ag^{+}\right| Ag = + 0.80 V$)
$H_2O$ is polar, whereas $BeF_2$ is not because
A transformer with efficiency 80% works at $4\, kW$ and $100\, V$. If the secondary voltage is $200\,V$, then the primary and secondary currents are respectively
Which of the following statements is correct regarding menstrual cycle?
A neutron in a nuclear reactor collides head on elastically with the nucleus of a carbon atom initially at rest. The fraction of kinetic energy transferred from the neutron to the carbon atom is
Documented microfossils have been found that are as old as
The water logging capacity of garden soil will be determined by measuring the weight of
Some salient features and phyla of organisms are given below. Select the option which shows correct combination of organism, its phylum and salient features.
The figure shows different human tissues labelled as A to D. Which option gives the correct identification of the label, its location and one feature?
The process where a population inhibits the growth of other population without affecting itself is known as
Identify the incorrect statement about ABA growth regulator.
Match the tissues/molecules mentioned in column I with those of their degrading enzymes mentioned in column II and select the correct option from the given codes. $\quad$$\quad$Column I$\quad$$\quad$$\quad$ $\quad$Column II A. $\quad$Cell wall$\quad$$\quad$$\quad$ (i) $\quad$Proteases B. $\quad$RNA $\quad$$\quad$$\quad$$\quad$ (ii) $\quad$Pectinases C. $\quad$Histone $\quad$$\quad$$\quad$(iii) $\quad$Ribonucleases D. $\quad$Pectin$\quad$$\quad$$\quad$$\quad$ (iv) $\quad$Cellulase
Which of the following is not a factor that would limit the growth of a population?
Select the correct statement regarding reproduction.
A large quantity of urban sewage is drained into nearby village river. Which among the given conditions would happen after mixing of sewage into the river? (i) $\quad$Biochemical oxygen demand (BOD) of receiving water body increases. (ii)$\quad$ Dissolved oxygen of receiving water body decreases. (iii) $\quad$It will not cause mortality among fishes and other aquatic creatures. (iv) $\quad$It will lead to nutrient enrichment of receiving water body.
When plants/animals are infected with virus, they may produce an anti-viral substance that is capable of inhibiting the multiplication of that virus. Identify the correct name of this substance.