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. 1Which one of the following reactions does not involve either oxidation or reduction?Chemistry· Physical Chemistry· Moderate· figure
2. 2In acid solution, the reaction [IMAGE] involvesChemistry· Physical Chemistry· Easy· figure
3. 3Which of the following is redox reaction?Chemistry· Physical Chemistry· Easy· figure
4. 4Which is the best description of the behavior of bromine in the reaction given belowChemistry· Physical Chemistry· Moderate· figure
5. 5Of the four oxy-acids of chlorine the strongest oxidizing agent in dilute aqueous solution isChemistry· Physical Chemistry· Moderate· figure
6. 6Which gives mono substituted productChemistry· Organic Chemistry· Moderate· figure
7. 7The electrophile in the nitration of benzene isChemistry· Organic Chemistry· Tough· figure
8. 8The conversion of PbO_2 to Pb(NO_3)_2 isChemistry· Physical Chemistry· Moderate
9. 9Among the following compounds (I-III) the correct order in reaction with an electrophile reagent is.Chemistry· Organic Chemistry· Easy· figure
10. 10Which is the decreasing order of stability?Chemistry· Organic Chemistry· Moderate· figure
11. 11Which is the most stable carbocation?Chemistry· Organic Chemistry· Moderate· figure
12. 12At 27º C, one mole of an ideal gas is compressed isothermally and reversibly from a pressure of 2 atm to 10 atm. The values of E and q are…Chemistry· Physical Chemistry· Moderate
13. 13Most stable carbanion isChemistry· Organic Chemistry· Easy· figure
14. 14The work done in ergs for the reversible expansion of one mole of an ideal gas from a volume of 10 litres to 20 litres at 25ºC isChemistry· Physical Chemistry· Easy
15. 15Joule-Thomson expansion isChemistry· Physical Chemistry· Easy
16. 16$E^{0}$ of combustion of isobutylene is -X kJ mol^-1. The value of $\Delta H^{\circ}$ isChemistry· Physical Chemistry· Moderate
17. 17Internal energy isChemistry· Physical Chemistry· Moderate
18. 18An engine operating between 150ºC and 25ºC takes 500 J heat from a higher temperature reservoir if there are no frictional losses, then…Chemistry· Physical Chemistry· Moderate
19. 19$H_{2}O_{2}$ reduces $K_{4}Fe(CN)_{6}$Chemistry· Physical Chemistry· Moderate
20. 20[IMAGE] Standard entropy change for the above reaction isChemistry· Physical Chemistry· Easy· figure
21. 21Molar heat of vaporization of a liquid is $6\ k{mol}^{- 1}$, If the entropy change is $16{Jmol}^{- 1}K^{- 1}$, the boiling point of the…Chemistry· Physical Chemistry· Moderate
22. 22In the combustion of 2.0 gm of methane 25 kcal heat is liberated; heat of combustion of methane would be ____________________ kcalChemistry· Physical Chemistry· Moderate
23. 23The oxidation state of Cr in [IMAGE] isChemistry· Organic Chemistry· Moderate· figure
24. 24Number of [IMAGE] bonds inChemistry· Organic Chemistry· Tough· figure