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 of the following is not a reducing agent?Chemistry· Physical Chemistry· Easy
2. 2In the reaction [IMAGE] the [IMAGE] acts asChemistry· Physical Chemistry· Moderate· figure
3. 3Which of the following substances acts as an oxidizing as well as a reducing agent?Chemistry· Physical Chemistry· Moderate· figure
4. 4How many moles of [IMAGE] can be reduced by 1 moleChemistry· Physical Chemistry· Tough· figure
5. 5Starting from propanoic acid, the following reactions were carried out [IMAGE] What is the compound ZChemistry· Organic Chemistry· Tough· figure
6. 6Which of the following reacts with [IMAGE] to give phenol?Chemistry· Organic Chemistry· Moderate· figure
7. 7[IMAGE], the reaction isChemistry· Physical Chemistry· Moderate· figure
8. 8A solution of [IMAGE] -chloro-2-phenylethane in toluene racemizes slowly in the presence of small amount of [IMAGE] due to the formation ofChemistry· Organic Chemistry· Easy· figure
9. 9Number of optical isomers of lactic acid areChemistry· Organic Chemistry· Moderate· figure
10. 10At constant T and P. which one of the following statements is correct for the reaction, [IMAGE].Chemistry· Physical Chemistry· Easy· figure
11. 11Work done during isothermal expansion of one mole of an ideal gas from 10 atm to 1 atm at [IMAGE] is (Gas constant = 2)Chemistry· Physical Chemistry· Easy· figure
12. 12The work done by a system is 8 joule. When 40 joule heat is supplied to it? What is the increase in internal energy of system?Chemistry· Physical Chemistry· Moderate· figure
13. 13Which one of the following is least reactive in a nucleophilic substitution reaction?Chemistry· Organic Chemistry· Moderate· figure
14. 14Which statement is true for cyclohexaneChemistry· Organic Chemistry· Easy· figure
15. 15One mole of an ideal gas is allowed to expand reversibly and adiabatically from a temperature of[IMAGE]. If the work done during the…Chemistry· Physical Chemistry· Tough· figure
16. 16The enthalpy change for the transition of liquid water to steam. [IMAGE]. The entropy change for the process isChemistry· Physical Chemistry· Moderate· figure
17. 17The volume of a gas decreases from [IMAGE] to [IMAGE] when a sample of gas is compressed by an average pressure of 0.6 atm. During this…Chemistry· Physical Chemistry· Moderate· figure
18. 18When sodium metal is dissolved in liquid ammonia, blue colour solution is formed. The blue colour is due toChemistry· Physical Chemistry· Moderate· figure
19. 19The entropy changed involved in the conversion of 1 mole of liquid water at 373 K to vapor at the same temperature will beChemistry· Physical Chemistry· Easy· figure
20. 20If [IMAGE] then the possible heat of methane will be ___________________________ KcalChemistry· Physical Chemistry· Moderate· figure
21. 21Heat of formation in the reaction[IMAGE] is ___________kcalChemistry· Physical Chemistry· Moderate· figure
22. 22[IMAGE] has how many isomeric forms that contain a benzene ringChemistry· Organic Chemistry· Moderate· figure
23. 23The molecular formula of diphenyl methane[IMAGE], is [IMAGE] How many structural isomers are possible when one of the hydrogens is replaced…Chemistry· Organic Chemistry· Moderate· figure
24. 24The number of enantiomers of the compoundChemistry· Organic Chemistry· Moderate· figure