List of top Questions asked in JKCET- 2004

Maximum freezing point falls in

Which of the following solutions will have the highest boiling point?

The activation energy for most of the reactions is approximately $50\, kJ\, mol^{-1}.$ The value of temperature coefficient for such reactions is

If the velocity of a particle is given by $ v=(180-16x)^{1/2}\,m/s$ . then its acceleration will be

Current is flowing with a current density $j = 480 Acm ^{-2}$ in a copper wire. Assuming that each copper atom contributes one free electron and given that Avogadro number $= 6.0 \times 10^{23} \, atom \, mol^{-1}$ Density of copper $ = 9.0 \, g \, cm^{-2} \, $ Electronic charge $ = 1.6 \times 10^{-19} C $ Atomic weight of copper $= 64 \, g \, mol^{-1}$ The drift velocity of electrons is

If the excess pressure inside a soap bubble is balanced by oil column of height $ 2\,mm, $ then the surface tension of soap solution will be ( $ r=1\,cm $ and density $ d=0.8\, g/\,cc $ )

A charge $q$ is lying at mid-point of the line joining the two similar charges $Q$. The system will be in equilibrium, if the value of $q$ is

Charges $2q,\, -q$ and $-q$ lie at the vertices of a triangle. The value of $E$ and Vat the centroid of equilateral triangle will be

$1\, mol$ of $H _{2} SO _{4}$ is mixed with $2$ moles of $NaOH$. The heat evolved will be

One mole of a perfect gas expands isothermally to ten times of its original volume. The change in entropy is

For the reaction, $N_{2}+3 H_{2} 2 N H ; \Delta H=$ ?

Infinite charges of magnitude $q$ each are lying at $ x=1,2,4,8,... $ metre on $X$-axis. The value of intensity of electric field at point $ x=0 $ due to these charges will be

With what velocity should an observer approach stationary sound source, so that the apparent frequency of sound appear to be double of the initial frequency? (given velocity of sound $= v$)

The ratio of electric fields on the axis and at equator of an electric dipole will be

Number of atoms of oxygen present in $10.6\, g$ of $Na _{2} CO _{3}$ will be

The correct name of the compound $\left[ Cu \left( NH _{3}\right)_{4}\right]\left( NO _{3}\right)_{2}$ according to IUPAC system is

The wave theory of light was given by

On increasing the plate separation of a charged condenser, the energy

Volume of $0.1\, M\, K _{2} Cr _{2} O _{7}$ required to oxidize $35\, mL$ of $0.5\, M\, FeSO _{4}$ solution is

Some electric bulbs are connected in series across a $ 220\,V $ supply in a room. If one bulb is fused, then remaining bulbs are connected again in series across the same supply. The illumination in the room will be

The capacity of parallel plate capacitor in air and on immersing it into oil is $50\,\mu F $ and $ 110\,\mu F $ respectively. The dielectric constant of oil is

In a reversible process, $ \Delta S_{\text{system}}+\Delta S_{\text{surrounding}}$ is

The energy stored in a condenser is in the form of

Source of sound and the observer are mutually at rest. If the speed of sound is changed, then the frequency of sound heard by the observer will appear to be

Cilia are :