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. 1Number of structural isomers of C_4 H_10 O isChemistry· Organic Chemistry· Easy· figure
2. 2Which of the following is the most powerful oxidizing agentChemistry· Physical Chemistry· Easy
3. 3In the following reaction Which element is reduced?Chemistry· Physical Chemistry· Easy· figure
4. 4The oxidation number of S in $H_{2}S_{2}O_{3}$ isChemistry· Physical Chemistry· Moderate· figure
5. 5Which is the best description of the behavior of bromine in the reaction given below? $H_{2}O + Br_{2} \rightarrow HOB^{2} + HBr$Chemistry· Physical Chemistry· Moderate· figure
6. 6When SO_2 is passed through acidic solution of potassium dichromate, then chromium sulphate is formed. Change in valency of chromium is.Chemistry· Physical Chemistry· Moderate· figure
7. 7Which of the following will show aromatic behaviour?Chemistry· Organic Chemistry· Easy· figure
8. 8Which of the following resonating structures of 1-methoxy-1, 3 -butadiene is least stableChemistry· Organic Chemistry· Moderate
9. 9If is the number of atoms in the unit cell that represents the closest packing sequence ---A B C A B C---,the number of tetrahedral voids…Chemistry· Physical Chemistry· Easy
10. 10Complex is formed in the extraction ofChemistry· Inorganic Chemistry· Moderate
11. 11The final step for the extraction of copper from copper pyrite in Bessemere converter involves the reactionChemistry· Inorganic Chemistry· Moderate
12. 12Heating mixture of Cu_2O and Cu_2S will giveChemistry· Inorganic Chemistry· Easy
13. 13After partial roasting, the sulphide of copper is reduced byChemistry· Inorganic Chemistry· Easy
14. 14Benzene reacts with chlorine to form benzene hexachloride in presence ofChemistry· Organic Chemistry· Easy· figure
15. 15Which compound does not form iodine form with alkali and iodine?Chemistry· Organic Chemistry· Moderate· figure
16. 16C6 H5Cl prepared by aniline withChemistry· Organic Chemistry· Moderate· figure
17. 17The compound formed on heating chlorobenzene with chloral in the presence of concentrated sulphuric acid, isChemistry· Organic Chemistry· Moderate· figure
18. 18Salicylic acid can be prepared using Reimer-Tiemann's reaction by treating phenol withChemistry· Organic Chemistry· Tough· figure
19. 19When phenol reacts with CHCl_3 and KOH, the product obtained would beChemistry· Organic Chemistry· Easy· figure
20. 20Structure similar to zinc blende is found inChemistry· Physical Chemistry· Moderate
21. 21Silver acetate[IMAGE]. The main product of this reaction isChemistry· Organic Chemistry· Moderate· figure
22. 22The vacant space in in the bcc unit cell isChemistry· Physical Chemistry· Moderate
23. 23The number of octahedral voids in a unit cell of a cubical closest packed structure isChemistry· Physical Chemistry· Moderate
24. 24Coordination number for Cu isChemistry· Physical Chemistry· Easy