Practice/Question bank/JEE Main

JEE Main practice questions

NTA-style Physics, Chemistry and Maths MCQs with solutions. 2,688 questions in the bank.

All subjectsChemistryMathematicsBiologyPhysics
  1. 1Arrange the following alkanols A, B and C in order of their reactivity towards acid catalysed dehydration:-,flM mRizsfjr futZyhdj.kChemistry· Organic Chemistry· Moderate· figure
  2. 2Kolbe's electrolysis of sodium maleate at anode gives. KolbeChemistry· Organic Chemistry· Moderate· figure
  3. 3Hydration of [IMAGE] in presence of H2SO4 / HgSO4 gives H2SO4 / HgSO4Chemistry· Organic Chemistry· Moderate· figure
  4. 4p-nitro toluene on further nitration givesChemistry· Organic Chemistry· Moderate· figure
  5. 5(CH_3)_3CMgCl on reaction with D_2O produces (CH_3)_3CMgCl, D_2OChemistry· Organic Chemistry· Moderate· figure
  6. 6JM-CH-26-Q25Chemistry· Organic Chemistry· Moderate· figure
  7. 7To 500 cm3 of water, 3.0 × 10-3 kg of acetic acid is added. If 23 of acetic acid is dissociated, what will be the depression in freezing…Chemistry· Physical Chemistry· Tough
  8. 8A 0.004 M solution of Na2SO4 is isotonic with 0.010 M solution of glucose at same temperature. The apparent percentage dissociation of…Chemistry· Physical Chemistry· Moderate
  9. 9The elevation in boiling point of a solution of 13.44 g of CuCl2 in 1kg of water using the following information, will be (Molecular weight…Chemistry· Physical Chemistry· Moderate
  10. 10When 20 g of naphthoic acid (C11H8O2) is dissolved in 50 g of benzene (Kf = 1.72 K kg mol-1), a freezing point depression of 2 K is…Chemistry· Physical Chemistry· Moderate
  11. 11Equimolar solutions in the same solvent haveChemistry· Physical Chemistry· Easy
  12. 12MX2 dissociates into M2+ and X- ions in an aqueous solution, with a degree of dissociation $(\alpha)$ of 0.5 The ratio of the observed…Chemistry· Physical Chemistry· Moderate
  13. 13The number of hydrogen atom (s) attached to phosphorus atom in hypophosphorus acid is: gkbiks QkLQksjl vEy esa QkWLQksjl ijek.kq ls tqM+s…Chemistry· Inorganic Chemistry· Moderate· figure
  14. 14The equilibrium constant for the reaction, N2 (g) + O2 (g)[IMAGE] 2NO(g) at temperature T is 4 × 10-4. The value NO(g)[IMAGE] N2 (g) +…Chemistry· Physical Chemistry· Moderate· figure
  15. 15The total number of electrons present in 4th shell of Astatatine (85At) are:,LVsjhu (_85At) ds 4^th dks'k es mifLFkr bysDVªkWuChemistry· Inorganic Chemistry· Moderate· figure
  16. 16An amount of solid NH_4HS is placed in a flask already containing ammonia gas at a certain temperature at 0.50 atm pressure. Ammonium…Chemistry· Physical Chemistry· Tough· figure
  17. 17A vessel at 1000 K contains CO2 with a pressure of 0.5 atm. Some of the CO2 is converted into CO on the addition of graphite. If the total…Chemistry· Physical Chemistry· Moderate· figure
  18. 18If the solubility product of a salt MX is 3 × 10-10 at 0ºC, determine _____ × 10-5 mol/L solubility. fn 0ºC ij yo.k MX xq.kuQy 3 × 10-10…Chemistry· Physical Chemistry· Moderate· figure
  19. 19M(OH)x (producing Mx+ and OH- ions) has Ksp 4 × 10-12 and solubility 10-4 M. The value of x is: M(OH)x (tks Mx+ o OH- vk;u cukrk gS) 4 ×…Chemistry· Physical Chemistry· Moderate
  20. 20In a saturated solution of the sparingly soluble strong electrolyte AgIO3 (Molecular mass = 283), the equilibrium which sets in is:…Chemistry· Physical Chemistry· Moderate· figure
  21. 21The minimum volume of the water needed to dissolve 1 g of BaSO4 (Ksp = 10-10) is about: Assume no reaction of cation/anion. [Mol. mass…Chemistry· Physical Chemistry· Tough
  22. 22Regular use of which of the following fertilizers increases the acidity of soil?Chemistry· Inorganic Chemistry· Moderate
  23. 23The solubility of CaF2 (Ksp = 5.3 × 10-9) in 0.1 M solution of NaF would be: Assume no reaction of cation/anion. n × 10-7. Find the value…Chemistry· Physical Chemistry· Tough· figure
  24. 24Which of the following statements regarding sulphur is incorrect ?Chemistry· Inorganic Chemistry· Easy
Next page