JEE Main questions
34495 published questions with worked solutions.
- If the magnetic field in a plane electromagnetic wave is given by B =3 10^ -8 (1.6 10^3x+48 10^ 10 t) j T, then what will be...
- If we need a magnification of 375 from a compound microscope of tube length 150 mm and an objective of focal length 5 mm, the...
- A 60 HP electric motor lifts an elevator having a maximum total load capacity of 2000 kg. If the frictional force on the elevator...
- The radius of gyration of a uniform rod of length , about an axis passing through a point 4 away from the centre of the rod, and...
- Two moles of an ideal gas with C_P C_V = 5 3 are mixed with 3 moles of another ideal gas with C_P C_V = 4 3 . The value of C_P...
- A beam of electromagnetic radiation of intensity 6.4 10^ -5 W/ cm ^2 is comprised of wavelength, = 310 nm. It falls normally on a...
- A loop ABCDEFA of straight edges has six corner points A(0, 0, 0), B(5, 0, 0), C(5, 5, 0), D(0, 5, 0), E(0, 5, 5) and F(0, 0, 5)....
- A non-isotropic solid metal cube has coefficients of linear expansion as : 5 10^ -5 /ºC along the x-axis and 5 10^ -6 /ºC along...
- A Carnot engine operates between two reservoirs of temperatures 900 K and 300 K. The engine performs 1200 J of work per cycle....
- The IUPAC name of the complex [ Pt(NH_3)_2Cl(NH_2CH_3) ] Cl is :
- Consider the following reactions : (a) (CH_3)_3CCH(OH)CH_3 conc. H_2SO_4 (b) (CH_3)_2CHCH(Br)CH_3 conc. KOH (c)...
- Amongst the following statements, that which was not proposed by Dalton was -
- At 35ºC, the vapour pressure of CS_2 is 512 mm Hg and that of acetone is 344 mm Hg. A solution of CS_2 in acetone has a total...
- The purest form of commercial iron is :Not in JEE Main or NEET syllabus
- The electron gain enthalpy (in kJ/mol) of fluorine, chlorine, bromine and iodine, respectively, are :
- The relative strength of interionic / intermolecular forces in decreasing order is
- The theory that can completely/properly explain the nature of bonding in [ Ni(CO)_4 ] is
- Oxidation number of potassium in K_2O , K_2O_2 and KO_2 , respectively, is :
- The atomic radius of Ag is closest to :
- Match the following : List-I: (i) Riboflavin (ii) Thiamine (iii) Pyridoxine (iv) Ascorbic acid List-II: (a) Beriberi (b) Scurvy...