List of top Questions asked in Haryana PMT- 2008

The degree of dissociation of $XY$ in case of following reaction is found to be $ 0.4 $ from vapour density measurement. If the observed vapour density of $X Y$ be $100$ then its molecular weight is $ XY\to X+Y $

A body of mass $3 \,kg$ is under a constant force which causes a displacement s in metre in it, given by the relation $s=\frac{1}{3}t^2$, where $t$ is in second. Work done by the force in $2 s$ is

An electric dipole of moment $p$ is Iying along a uniform electric field $E$. The work done in rotating the dipole by $90^{\circ}$ is

Two sound waves with wavelength $5.0 \,m$ and $5.5 \,m$ respectively, each propagate in a gas with velocity $330 \,m/s$. We expect the following number of beats per second

The integrated rate equation is $ kt=\log \,C_{0}-\log C_{t} $ . The straight line graph is obtained by plotting

A basic buffer solution is formed by selecting the pair

pH of $ HCl $ (conc. $ 0.1 \, mol/L $ ) is one. Compute the pH of $0.05\, mol/L$ solution of $ H_{2}SO_{4} $ .

What is the $pH$ at equivalence point in the titration of $0.1 \,M \,CH _{3} COOH$ and $0.1 \,M \,NaOH ?\left( K _{a}\right.$ for acetic acid is $1.8 \times 10^{-5}$ )

For the reaction, $ C(s)+CO_{2}(g)2CO(g) $ the partial pressure of $ CO_{2} $ and $ CO $ are $2.0$ and $4.0$ arm respectively then equilibrium $ K_{p} $ for the reaction will be

Solubility of $ AgCl $ will be minimum in

$ HCl $ is completely neutralised by $ NaOH $ solution. The resulting solution contains the following species

The dipole moment of HBr is $1.6 \times 10^{-30} $C-m and interatomic spacing is $1 \mathring{A}$. The per cent ionic character of HBr is

Alternating current cannot be measured by $D.C.$ ammeter because

A transverse wave propagating along x-axis is represented by $ y(x,t)=8.0\sin \left( 05\pi x-4\pi t-\frac{\pi }{4} \right) $ where $x$ is in metre and $t$ is in second. The speed of the wave is

A microscope is focused on a mark on a piece of paper and then a slab of glass of thickness $3 \,cm$ and refractive index $1.5$ is placed over the mark. How should the microscope be moved to get the mark in focus again?

The binding energy of deuteron is $2.2 \,MeV$ and that of $ _{2}^{4}He$ is $28 \,MeV$. If two deuterons are fused to form one $ _{2}^{4} He$, then the energy released is

A Carnot engine whose sink is at $300 \,K$ has an efficiency of $40\%$. By how much should the temperature of source be increased so as to increase its efficiency by $50\%$ of original efficiency?

A transistor-oscillator using a resonant circuit with an inductor $L$ (of negligible resistance) and a capacitor $C$ in series produce oscillations of frequency $ f $ . If $L$ is doubled and $C$ is changed to $4C$, the frequency will be

Two cells, having the same emf, are connected in series through an external resistance $R$. Cells have internal resistances $ r_{1} $ and $ r_{2} $ $ (r_{1} > r_{2}), $ respectively. When the circuit is closed, the potential difference across the first cell is zero. The value of $R$ is

Two masses $ m_{1}=5\,kg $ and $ m_{2}=4.8\,kg $ tied to a string are hanging over a light frictionless pulley. What is the acceleration of the masses when lift is free to move ? $ (g=9.8 \, m/s^{2}) $

A black body at $ 1227^{\circ} C $ emits radiations with maximum intensity at a wavelength of $ 5000\,? $ . If the temperature of the body is increased by $ 1000^{\circ} C $ , the maximum intensity will be observed at

The earth is assumed to be a sphere of radius $R$. A platform is arranged at a height $R$ from the surface of the earth. The escape velocity of a body from this platform is $fv$, where $v$ is its escape velocity from the surface of the Earth. The value of $f$ is :-

The radius of a spherical drop of water is $1 \,mm$. If surface tension of water be $70\times10^{-3} Nm^{-1},$ the pressure difference inside and outside the drop will be

Protein is a polymer of