List of top Questions asked in COMEDK UGET

50% of a first order reaction is completed in 30 min. The velocity constant of the reaction is
Tetrahedral structure is formed by
Power factor of a series $LCR $ circuit is
A star is moving away from the Earth with speed $V$. Change in wavelength $(d\lambda)$ observed on Earth is
To dry ammonia gas the drying agent used is
When phenol is treated with chloromethane in presence of $AlCl_3$ we get
Proton and $\alpha$ particle have the same deBroglie wavelength. Which one is the same for both of them ?
Distance between two point charges is increased by 20%. Force of interaction between the charges
Pure water is neutral because
The ebullioscopic constant is the elevation in boiling point produced by
A $CE$ amplifier has current gain 50. Load resistance is $4 \, k\Omega$ and input resistance is $500 \, \Omega . 10 \, m V \, AC$ signal is applied. Peak value of output signal is
90 dB sound is x times more intense than 40 dB sound, then x is
0.5 g of an acid is neutralized by 40 cc of 0.125 N NaOH. The equivalent mass of the acid is
In the Molisch reagent, the substance used is
$2p_x$ atomic orbital undergoes linear combination with
The adsorption of an inert gas on activated charcoal increases with
If $A= \begin{bmatrix}1&2\\ 0&1\end{bmatrix} $, then $A^n$ is
If $\alpha , \beta , \gamma$ are the roots of the equation $x^3 + px + q = 0$, then the value of the determinant $\begin{vmatrix}\alpha&\beta&\gamma\\ \beta&\gamma&\alpha\\ \gamma&\alpha&\beta\end{vmatrix} = $
The number of distinct real roots of $\begin{vmatrix}\sin x&\cos x&\cos x\\ \cos x&\sin x&\cos x\\ \cos x &\cos x&\sin x\end{vmatrix}$ in the interval $ \left[\frac{-\pi}{4}, \frac{\pi}{4}\right] $ is
$\displaystyle\lim_{n\to\infty} \frac{\left(1^{2} +2^{2} + ....+n^{2}\right) \sqrt[n]{n}}{ \left(n+1\right)\left(n+10\right)\left(n+100\right)} = $
The solution of the differential equation $\frac{dy}{dx} = (x +y)^2$ is
In a $CE$ amplifier $\beta = 50, R_L = 4 \, k\Omega , R_1 = 500 \, \Omega $. Power gain of the amplifier is
Macrophages are modified
Spongiform encephalopathy is caused by
The resistance of mercury at $4.2 \, K$ is