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 chiral carbon present in the following compoundChemistry· Stereoisomerism· Easy· figure
2. 2Pressure of the gas in columnChemistry· Ideal Gas· Easy
3. 3The total number of cyclic isomers possible for a hydrocarbon with the molecular formula C4H6 is / areChemistry· IUPAC and Structural Isomerism· Easy
4. 4Which of the following groups (attached with benzene ring) show + M effect?Chemistry· Organic Chemistry· Moderate· figure
5. 5When 100 ml of a O2 - O3 mixture was passed through turpentine, there was reduction of volume by 20 ml. If 100 ml of such a mixture is…Chemistry· Ideal Gas· Tough
6. 6The number of water molecule (s) directly bonded to the metal center in CuSO4. 5H2O isChemistry· Chemical Bonding· Moderate· figure
7. 725 mL of a solution of Fe2+ ions was titrated with a solution of the oxidizing agent Cr2O72-. 50 mL of 0.01 M K2Cr2O7 solution was…Chemistry· Equivalent Concept· Moderate· figure
8. 8The IUPAC name ofChemistry· IUPAC and Structural Isomerism· Moderate· figure
9. 9Which of the following is the structure of (S)-Pentan-2-ol is?Chemistry· Stereoisomerism· Moderate· figure
10. 10A compound having straight chain of five carbon atoms has one ketone group and two methyl groups on different-different carbon atoms. The…Chemistry· IUPAC and Structural Isomerism· Moderate· figure
11. 11Select the correct statement about this compound.Chemistry· Organic Chemistry· Easy· figure
12. 12Total number of position isomers of trimethyl cyclohexane areChemistry· IUPAC and Structural Isomerism· Moderate· figure
13. 13Which of the following pairs of compounds are enantiomersChemistry· Stereoisomerism· Moderate· figure
14. 14When 100g of ethylene polymerises entirely to polyethene, the weight of polyethene formed as per the equation n(C2H4) → (-CH2-CH2-)n isChemistry· Mole concept· Moderate
15. 15For BF3 molecule which of the following is true?Chemistry· Chemical Bonding· Moderate· figure
16. 16Consider a Body Centered Cubic(bcc) arrangement, let de, dfd, dbd be the distances between successive atoms located along the edge, the…Chemistry· Moderate· figure
17. 17${CH}_{3}{CH}_{2}{CH}_{2}CN + 2H_{2}\overset{Pd}{\longrightarrow}$ Which of the following compound is formed in the above reaction?Chemistry· Amines· Moderate
18. 18The shortest distance between Ist and Vth layer of HCP arrangement isChemistry· Moderate
19. 19Bleaching powder turns Red litmus to blue and finally white, it is due to: (A) OH- (B) HCl (C) OCl- (D) ClChemistry· S-block· Moderate
20. 20Which of the following compounds will not undergo azo coupling reaction with benzene diazoniumchloride? A Aniline B Phenol C Anisole D…Chemistry· Amines· Moderate
21. 21Which can do glass etching?Chemistry· P-block VA, VIA, VIIA elements· Easy
22. 22Total number of atom in one molecule or formula unit of is?Chemistry· S-block· Moderate· figure
23. 23Nitrogen is best obtained by the thermal decomposition of which one of the followingChemistry· P-block VA, VIA, VIIA elements· Moderate
24. 24In the reaction ${({CH}_{3})}_{3}CCHO + HCHO\frac{NaOH}{heat}A + B$the products (A) and (B) are respectivelyChemistry· Carbonyl Compound (Aldehyde and Ketone)· Tough· figure