List of top Questions asked in JKCET

If $X$ and $Y$ are $ 2\times 2 $ matrices such that $ 2X+3Y=O $ and $ X+2Y=I, $ where $ O $ and $ I $ denote the $ 2\times 2 $ zero matrix and the $ 2\times 2 $ identity matrix, then $X$ is equal to
The value of $\begin{vmatrix} \log_5\,729 & \log_3\,5 \\[0.3em] \log_5\,27 & \log_9\,25 \end{vmatrix}.\begin{vmatrix} \log_3\,5 & \log_{27}\,5 \\[0.3em] \log_5\,9 & \log_5\,9 \end{vmatrix}=$
If $ f\,(x)=\underset{y\to x}{\mathop{lim}}\,\,\frac{{{\sin }^{2}}y-{{\sin }^{2}}x}{{{y}^{2}}-{{x}^{2}}}, $ then $ \int{4x\,\,f(x)\,\,dx} $ =
A cricket ball of mass $0.5\, kg$ strikes a cricket bat normally with a velocity of $20\, ms ^{-1}$ and rebounds with velocity of $10\, ms ^{-1}$. The impulse of the force exerted by the ball on the bat is
The velocity of an electromagnetic wave in vacuum can be changed by changing
When a wave undergoes refraction
The resistance of an ideal voltmeter is
Which one of the following is strongest Lewis acid ?
In a moving coil galvanometer, to make the field radial
If the sum to $2n$ terms of the $ A.P. \text{ }2,\text{ }5,\text{ }8,11,... $ is equal to the sum to $n$ terms of the $\text{ }57,\text{ }59,\text{ }61,\text{ }63,\text{ }...\text{ }, $ then $n$ =
Electric flux emanating through a surface element $ \overrightarrow{ds}=5\hat{i} $ placed in an electric field $ \vec{E}=4\hat{i}+4\hat{j}+4\hat{k} $ is
Energy stored per unit volume of a parallel plate capacitor having plate area $A$ and plate separation d when charged to a potential of $V$ volts is (air space in between the plates)
A particle is executing linear simple harmonic motion. The fraction of the total energy that is potential, when its displacement is $ \frac{1}{4} $ of the amplitude is
The molar mass of the solute sodium hydroxide obtained from the measurement of the osmotic pressure of its aqueous solution at $27^{\circ} C$ is $25 \,g \,mol ^{-1}$. Therefore, its ionization percentage in this solution is
The percentage of carbon in cast iron is
Which one of the following molecules is paramagnetic?
The most acidic among the following is
Which one of the following does not form sodium bisulphite addition product with sodium bisulphite solution?
The auto reduction process is not used in the metallurgy of
The oxidation numbers of the sulphur atoms in peroxomonosulphuric acid $ (H_{2}SO_{5}) $ and peroxodisulphuric acid $ (H_{2}S_{2}O_{8}) $ are respectively
If the ratio of the rates of diffusion of two gases $A$ and $B$ is $4 : 1$, the ratio of their densities in the same order is

Which one of the following is \(d\) block element?

The composition of bell metal is
Which of the following has maximum laevorotatory nature ?
The working principle of rocket propulsion is conservation of