List of top Questions asked in COMEDK UGET

A calcite crystal is placed over a dot on a paper sheet and the crystal is rotated. On viewing through the calcite one sees

$n $ type and $p$ type semiconductors can be obtained by doping pure silicon respectively with

Potential energy of two charges $10 \, nC$ each separated by a distance of 0.09 m in air is

Viscosity decreases with increase in temperature is the reason for (i) hot water moving faster than cold water (ii) more viscous oils are used in motor cars during summer than in winter

The standard temperature used in thermo- chemical calculations is

Which of the following is an intensive property?

A reaction is spontaneous at all temperatures when

Quality factor of a series $LCR$ circuit decreases from 3 to 2. Resonant frequency is $600 \, Hz$. Change in band width is

Specific resistance of a conductor material increases with

The lowering in vapour pressure is maximum for

Tetrahedral structure is formed by

Horn silver is

To dry ammonia gas the drying agent used is

When the same amount of electricity is passed through solutions of silver nitrate and copper sulphate, 0.4 g copper is deposited. The amount of silver deposited is

50 cc of oxalic acid is oxidized by 25 cc of 0.20 $ { N \, KMnO_4}$. The mass of oxalic acid present in 500 cc of the solution is

50% of a first order reaction is completed in 30 min. The velocity constant of the reaction is

Distance between two point charges is increased by 20%. Force of interaction between the charges

A star is moving away from the Earth with speed $V$. Change in wavelength $(d\lambda)$ observed on Earth is

Power factor of a series $LCR $ circuit is

Proton and $\alpha$ particle have the same deBroglie wavelength. Which one is the same for both of them ?

The argument of the complex number $\sin\left(\frac{6\pi}{5}\right) + i\left(1 +\cos \frac{6\pi}{5}\right) $ is