JEE Main questions
34495 published questions with worked solutions.
- Orange light of wavelength 6000 10^ -10 m illuminates a single slit of width 0.6 10^ -4 m. The maximum possible number of...
- The distance between an object and a screen is 100 cm. A lens can produce real image of the object on the screen for two...
- The one that can exhibit highest paramagnetic behaviour among the following is : gly = glycinato; bpy = 2, 2'-bipyridine
- 250 mL of a waste solution obtained from the workshop of a goldsmith contains 0.1 M AgNO_3 and 0.1 M AuCl. The solution was...
- The reaction in which the hybridization of the underlined atom is affected is :
- The molecule in which hybrid MOs involve only one d-orbital of the central atom is :
- An alkaline earth metal 'M' readily forms water soluble sulphate and water insoluble hydroxide. Its oxide MO is very stable to...Not in JEE Main or NEET syllabus
- The major product [B] In the following reactions is : CH_3 - CH_2 - CH(CH_3) - CH_2 - OCH_2 - CH_3 [ Heat ] HI [ A ] [ ] alcohol...
- The incorrect statements(s) among (a) – (c) is are : (a) W(VI) is more stable than Cr(VI). (b) in the presence of HCl...
- A sample of red ink (a colloidal suspension) is prepared by mixing eosin dye, egg white, HCHO and water. The component which...Not in JEE Main or NEET syllabus
- The number of molecules with energy greater than the threshold energy for a reaction increases five fold by a rise of temperature...
- Consider the following equations: 2Fe^ 2+ +H_2O_2 xA+yB (in basic medium) 2MnO_4^-+6H^++5H_2O_2 x'C+y'D+z'E (in acidic medium)...
- A 100 mL solution was made by adding 1.43 g of Na_2CO_3.xH_2O . The normality of the solution is 0.1 N. The value of x is...
- The osmotic pressure of a solution of NaCl is 0.10 atm and that of a glucose solution is 0.20 atm. The osmotic pressure of a...
- The number of chiral centes present in threonine is ________.
- In a game two players A and B take turns in throwing a pair of fair dice starting with player A and total of scores on the two...
- Let 0 be in R. If and are the roots of the equation, x^2-x+2 =0 and and are the roots of the equation, 3x^2-10x+27 =0, then is...
- Let x = 4 be a directrix to an ellipse whose centre is at the origin and its eccentricity is 1 2 . If P(1, ), > 0 is a point on...
- If the system of equations x+y+z=2 2x+4y-z=6 3x+2y+ z= has infinitely many solutions, then :
- The area (in sq. units) of the largest rectangle ABCD whose vertices A and B lie on the x-axis and vertices C and D lie on the...