Practice questions
88551 published questions with worked solutions.
- In a Young's double slit experiment, 16 fringes are observed in a certain segment of the screen when light of wavelength 700 nm...
- In a hydrogen atom the electron makes a transition from (n + 1)th level to the nth level. If n>>l, the frequency of radiation...
- If momentum (P), area (A) and time (T) are taken to be the fundamental quantities then the dimensional formula for energy is :
- A capillary tube made of glass of radius 0.15 mm is dipped vertically in a beaker filled with methylene iodide (surface tension =...
- The height 'h' at which the weight of a body will be the same as that at the same depth 'h' from the surface of the earth is...
- An ideal gas in a closed container is slowly heated. As its temperature increases, which of the following statements are true ?...
- An inductance coil has a reactance of 100 . When an AC signal of frequency 1000 Hz is applied to the coil, the applied voltage...
- Two uniform circular discs are rotating independently in the same direction around their common axis passing through their...
- A 10 capacitor is fully charged to a potential difference of 50 V. After removing the source voltage it is connected to an...
- When the temperature of a metal wire is increased from 0°C to 10°C, its length increases by 0.02%. The percentage change in its...
- In a plane electromagnetic wave, the directions of electric field and magnetic field are represented by k and 2 i -2 j ,...
- A particle is moving 5 times as fast as an electron. The ratio of the de-Broglie wavelength of the particle to that of the...
- A light ray enters a solid glass sphere of refractive index = 3 at an angle of incidence 60°. The ray is both reflected and...
- A wire of density 9 10^ -3 kg cm ^ -3 is stretched between two clamps 1 m apart. The resulting strain in the wire is 4.9 10^ -4 ....
- Cast iron is used for the manufacture of :Not in JEE Main or NEET syllabus
- Two compounds A and B with same molecular formula ( C_3H_6O ) undergo Grignard's reaction with methylmagnesium bromide to give...
- The shape/structure of [ XeF_5 ]^- and XeO_3F_2 , respectively, are :
- The major product obtained from E_2-elimination of 3-bromo-2-fluoropentane is :
- Three elements X, Y and Z are in the 3rd period of the periodic table. The oxides of X, Y and Z, respectively, are basic,...
- The number of subshells associated with n = 4 and m = –2 quantum numbers is :