List of top Questions asked in JIPMER- 2007

The absolute enthalpy of neutralisation of the reaction $MgO (s)+2 HCl (a q) \longrightarrow MgCl _{2}(a q)+ H _{2} O (l)$ will be

Potometer works on the principle of

When a wire of uniform cross-section $ a $ , length $ l $ and resistance $R$ is bent into a complete circle, resistance between two of diametrically opposite points will be

For the network shown in the figure, the value of the current $i$ is

A solution has a $1: 4$ mole ratio of pentane to hexane. The vapour pressure of the pure hydrocarbons at $20^{\circ} C$ are $440 \,mm$ of $Hg$ for pentane and $120 \,mm$ of $Hg$ for hexane. The mole fraction of pentane in the vapour phase would be

The aqueous solution containing which one of the following ions will be colourless? (Atomic no. $Sc = 21, Fe = 26, Ti = 22, Mn = 25$)

A particle executing simple harmonic motion of amplitude $5 \,cm$ has maximum speed of $31.4 \,cm/s$. The frequency of its oscillation is

The circular motion of a panicle with constant speed is

As per this diagram a point charge $+q$ is placed at the origin $O$. Work done in taking another point charge $-Q$ from the point $A$ [coordinates $(0, a)]$

Equilibrium constants $ K_{1}$ and $ K_{2} $ for the following equilibria

$H_{2}S $ gas when passed through a solution of cations containing $ HCl $ precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because:

At $25^{\circ} C$, the dissociation constant of a base, $BOH$, is $1.0 \times 10^{-12}$. The concentration of hydroxyl ions in $0.01\, M$ aqueous solution of the base would be

The worlds highly prized wool yielding Pashmina breed is

The total energy of an electron in the first excited state of hydrogen is about $- 3.4 \,eV$. Its kinetic energy in this state is

One of the most important functions of botanical gardens is that

Top - shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons, are characteristic features of

More than $70\%$ of worlds freshwater is contained in

The name of Norman Borlaug is associated with

Three crops that contribute maximum to global food grain production are

In the reaction ${ }_{1}^{2} H +{ }_{1}^{3} H \longrightarrow{ }_{2}^{4} He +{ }_{0}^{1} n$, if the binding energies of ${ }_{1}^{2} H ,{ }_{1}^{3} H$ and ${ }_{2}^{4} He$ are respectively $a, b$ and $c$ (in $MeV$, then the energy (in $MeV$ ) released in this reaction is

Two boys are standing at the ends $A$ and $B$ of a ground, where $A B=a$. The boy at $B$ starts running in a direction perpendicular to $A B$ with velocity $v_{1}$. The boy at $A$ starts running simultaneously with velocity $v$ and catches the other boy in a time $t$, where $t$ is

The monomer of the polymer

A reaction occurs spontaneously if

E. coli cells with a mutated $Z$ gene of the lac operon cannot grow in medium containing only lactose as the source of energy because

The number of moles of $ KMnO_{4} $ reduced by one mole of $KI$ in alkaline medium is