List of top Questions asked in AIIMS- 2006

Among the following, the species having square planar geometry for central atom are: (i) $XeF _{4}$ (ii) $SF _{4}$ (iii) $\left[ NiCl _{4}\right]^{2-}$ (iv) $\left[ PtCl _{4}\right]^{2-}$

Anilinium chloride is more acidic than ammonium chloride. Anilinium chloride is resonance stabilised.

The pair in which both species have same magnetic moment (spin only value) is

Circular loop of a wire and a long straight wire carry currents $I _{ c }$ and $I _{ e }$, respectively as shown in figure. Assuming that these are placed in the same plane. The magnetic field will be zero at the centre of the loop when the separation $H$ is :

The water pouch of instant cold pack for treating athletic injuries breaks when squeezed and $NH_4NO_3$ dissolves lowering the temperature. Addition of nonvolatile solute into solvent results into depression of freezing point of solvent.

A $5 \%$ solution (by mass) of cane sugar in water has freezing point of $271 \,K$ and freezing point of pure water is $273.15 \,K$. The freezing point of a $5 \%$ solution (by mass) of glucose in water is

According to transition state theory, for the formation of an activated complex, one of the vibrational degrees of freedom is converted into a translational degree of freedom. Energy of the activated complex is higher than the energy of reactant molecules.

The spatial distribution of the electric field due to two charges $(A, B)$ is shown in figure. Which one of the following statements is correct?

Five capacitors, each of capacitance value $C$ are connected as shown in the figure. The ratio of capacitance between $P$ and $R$, and the capacitance between $P$ and $Q$, is :

Among the following which one can have a meso form?

$40\, ml$ of $0.1\, M$ ammonia solution is mixed with $20 \,ml$ of $0.1\, M\, HCl$. What is the $pH$ of the mixture? $\left( p K_{b}\right.$ of ammonia solution is $\left.4.74\right)$

"Ordines Anomali" of Bentham and Hooker includes

Nitrobenzene on treatment with zinc dust and aqueous ammonium chloride gives

Methyl- $\alpha-D$-glucoside and methyl $-\beta-D$-glucoside are

Which of the following compounds has the highest boiling point?

What is common between chloroplasts, chromoplasts and leucoplasts ?

The moment of inertia of a rod about an axis through its centre and perpendicular to it is $\frac{1}{12} ML ^{2}$ (where $M$ is the mass and $L$, the length of the rod). The rod is bent in the middle so that the two halves make an angle of $60^{\circ}$. The moment of inertia of the bent rod about the same axis would be :

The incorrect statement among the following is

The energy gaps $(E_g)$ between valence band and conduction band for diamond, silicon and germanium are in the order

The circuit given below represents which of logic operations?

In $[Ag(CN)_2]^-$ , the number of $\pi$ bonds is

Given below is a circuit diagram of an $AM$ demodulator.

For good demodulation of $AM$ signal of carrier frequency $f$, the value of $R C$ should be :

For a spontaneous process the correct statement is

Flash light equipped with a new set of batteries, produces bright white light. As the batteries wear out,

By sucking through a straw, a student can reduce the pressure in his lungs to $750\, mm$ of $Hg$ (density $= 13.6\, g/cm^3$ ). Using the straw, he can drink water from a glass upto a maximum depth of