Practice/Question bank/JEE Main

JEE Main practice questions

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

1. 1An aqueous solution of a weak monobasic acid containing 0.1 g in 21.7g of water freezes at 272.813 K. If the value of K_f for water is 1.86…Chemistry· Physical Chemistry· Moderate· figure
2. 2Benzene and toluene form nearly ideal solutions. At 20ºC, the vapour pressure of benzene is 75 torr and that of toluene is 22 torr. The…Chemistry· Physical Chemistry· Easy· figure
3. 3The vapour pressure of benzene at a certain temperature is 640 mm of Hg. A non-volatile and non-electrolyte solid weighing 2.175 g is added…Chemistry· Physical Chemistry· Moderate· figure
4. 4If two substances A and B have [IMAGE] = 1: 2 and have mole fraction in solution 1: 2 then mole fraction of A in vapours.Chemistry· Physical Chemistry· Moderate· figure
5. 5Two solutions A and B are separated by semi permeable membrane. If liquid flows from A to B thenChemistry· Physical Chemistry· Easy
6. 6If 20 g of a solute was dissolved in 500 ml of water and osmotic pressure of the solution was found to be 600 mm of Hg at 15ºC, then…Chemistry· Physical Chemistry· Moderate· figure
7. 7On heating KClO_3, we getChemistry· Inorganic Chemistry· Tough· figure
8. 8Mark the oxide which is amphoteric in characterChemistry· Inorganic Chemistry· Moderate· figure
9. 9The metal which does not form ammonium nitrate by reaction with dilute nitric acid isChemistry· Inorganic Chemistry· Moderate· figure
10. 10The passage of current liberates [IMAGE] at cathode and [IMAGE] at anode. The solution isChemistry· Physical Chemistry· Moderate· figure
11. 11[IMAGE] in basic medium is reduced toChemistry· Inorganic Chemistry· Moderate· figure
12. 12Which of the following compound expected to be colorlessChemistry· Inorganic Chemistry· Moderate· figure
13. 13The correct order of magnetic moments (spin only values in B.M.) among isChemistry· Inorganic Chemistry· Moderate· figure
14. 14An alkene of molecular formula [IMAGE] on ozonolysis gives 2, 2 dimethyl propanal & 2 butanon, then the alkene isChemistry· Organic Chemistry· Moderate· figure
15. 15Which of the following compound gives a ketone with Grignard reagentChemistry· Organic Chemistry· Moderate· figure
16. 16distinguished by testing withChemistry· Organic Chemistry· Easy· figure
17. 17[IMAGE] is oxidised to [IMAGE] usingChemistry· Organic Chemistry· Moderate· figure
18. 18[IMAGE] product in the reaction isChemistry· Organic Chemistry· Moderate· figure
19. 19Which one of the following reactions is a method for the conversion of a ketone into a hydrocarbon?Chemistry· Organic Chemistry· Easy· figure
20. 20The reaction [IMAGE] is known asChemistry· Organic Chemistry· Moderate· figure
21. 21On passing 3 ampere of electricity for 50 minutes, 1.8 gram metal deposits. The equivalent mass of metal isChemistry· Physical Chemistry· Moderate· figure
22. 22The reagent that gives an orange coloured precipitate with acetaldehydeChemistry· Organic Chemistry· Easy· figure
23. 23If the [IMAGE] electrode is diluted to 100 times then the change in e.m.f. is increase of _____________ mVChemistry· Physical Chemistry· Moderate· figure
24. 24The specific conductance of a solution is [IMAGE] and conductivity is [IMAGE] The cell constant would beChemistry· Physical Chemistry· Easy· figure