List of top Questions asked in JKCET- 2012

The power of a convex lens is $2 $ dioptre. Its power is to be reduced to $1.5$ dioptre, by putting another lens in combination with it. Which of the following lenses will serve the purpose?

Which of the following is false for interference of light?

The dissolution of a gas in a liquid is governed by

Which of the following is a true statement?

$2$ -bromobutane reacts with $OH ^{-}$ in $H _{2} O$ to give $2$ -butanol. The reaction involves

Let $A$ and $B$ be two mutually exclusive events such that $ P(A\cap {{B}^{c}})=0.25 $ and $ P({{A}^{c}}\cap B)=0.5 $ . Then, $ P\{(A\cup {{B}^{c}})\} $ is equal to

In a single-slit diffraction experiment, the width of the slit is reduced by half. Which of the following needs to be done if the width of the central maxima has to remain the same?

In television transmission what type of modulation is used ?

Glucose can be converted into ethyl alcohol using

The correct order of increasing oxidizing power in the series is

The rate of reactions exhibiting negative activation energy

A bar magnet is placed upright on a floor (so that the axis of the magnet is vertical). A copper ring is held above the magnet, with its plane horizontal and released. The copper ring falls in such a manner that its axis always coincides with that of the magnet. What will be the acceleration with which the ring will fall? Acceleration due to gravity is $ 10\,m/s^{2} $ .

Standard electrode potential of half-cell reactions are given below $C u^{2+}+2 e^{-} \rightarrow C u ; E^{\circ}=0.34\, V $ $Z n^{2+}+2 e^{-} \rightarrow Z n ; E^{\circ}=-0.76 \,V$ What is the emf of the cell?

A compound with nitro group was reduced by $Sn / HCl$, followed by treatment with $NaNO _{2} / HCl$ and followed by phenol. The chromophore group in the final compound is

Addition of a non-volatile solute in a volatile ideal solvent

Avogadro number $\left(6.023 \times 10^{23}\right)$ of carbon atoms are present in

Which of the following laws of thermodynamics forms the basis for the definition of temperature?

Which of the following is true for the minimum angular separation of two stars, $\Delta \theta_{\min }$ can be resolved by a telescope? In the following aperture is the diameter of the objective

Which of the following is the correct arrangement of the electromagnetic spectrum in the increasing order of frequency ?

Spherical wave fronts, emanating from a point source, strike a plane reflecting surface. What will happen to these wave fronts, immediately after reflection ?

The de-Broglie wavelength of a particle is

A short solenoid of radius $a$, number of turns per unit length $n_{1}$ and length $L$ is kept coaxially inside a very long solenoid of radius $b$, number of turns per unit length $n_{2}$. What is the mutual inductance of the system?

Desalination of sea water can be done by

If the product of $n$ positive real numbers is one, then their sum is

The effective atomic number for $\left[R h\left(H_{2} O\right)_{6}\right]^{3+}$ (at. no. for $R h$ is $45$ ) is