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. 10.05 mole of LiAlH4 in ether solution was placed in a flask containing 74g (1 mole) of t-butyl alcohol. The product LiAlHC12H27O3 weighed…Chemistry· Mole concept· Tough· figure
2. 2How many of the following have greaterZ_eff than Silicon atom: Na, Mg, Al, P, Cl, S, N, O, C, FChemistry· Periodic table· Easy
3. 3How many of the following oxides are acidic?Chemistry· Chemical Bonding· Moderate
4. 4A 0.2 g sample containing copper (II) was analyzed eudiometrically, where copper (II)is reduced tocopper (I) by iodide ions. $2{Cu}^{2 +} +…Chemistry· Equivalent Concept· Tough
5. 5Draw all structurally isomeric benzene containing isomers with molecular formula [IMAGE]Chemistry· IUPAC Nomenclature and Structural Isomerism· Moderate· figure
6. 6The general formula [IMAGE] could be for open chainChemistry· Isomerism· Easy· figure
7. 7A compound possess 8 sulphur by mass. The least molecular mass isChemistry· Mole concept· Moderate· figure
8. 8When 100g of ethylene polymerises entirely to polyethene, the weight of polyethene formed as per the equation [IMAGE] isChemistry· Mole concept· Moderate· figure
9. 9Equal weight of (At. wt. = 24) are reacted to form the compound[IMAGE]. ThenChemistry· Mole concept· Tough· figure
10. 10Which of the following is correct order of stabilityChemistry· Periodic table· Easy
11. 11From the given set of species, point out the species from each set having highest Z_eff (a) O2-, F-, Na+ (b) Li, Be, Na (c) He, Li+, H- a b…Chemistry· Periodic table· Moderate
12. 12Match the correct atomic radius with the element: S.No. Element Code Atomic radius (pm) (i) Be (p) 74 (ii) C (q) 88 (iii) O (r) 111 (iv) B…Chemistry· Periodic table· Moderate
13. 13The correct IUPAC name of the following compound isChemistry· IUPAC Nomenclature· Easy· figure
14. 14The correct stability order of the following resonanating structures isChemistry· Organic Chemistry· Moderate· figure
15. 15Maximum extent of steric inhibition of resonance can be expected inChemistry· Organic Chemistry· Moderate· figure
16. 16Hot concentrated HNO3 converts graphite intoChemistry· P-block· Moderate
17. 17$B(OH)_{3} + NaOH \rightleftharpoons Na\lbrack B(OH)_{4}\rbrack$ How can this reaction be made to proceed in forward direction?Chemistry· P-block· Easy· figure
18. 18Volume of HCP unit cell isChemistry· Tough· figure
19. 19KCl can be used in salt bridge as electrolyte in which of the following cells?Chemistry· Electrochemistry· Easy
20. 20In a hypothetical solid C atoms form CCP lattice with A atoms occupying all the Tetrahedral Voids and B atoms occupying all the octahedral…Chemistry· Moderate· figure
21. 21Given standard electrode potentials: Fe3+ + 3e¯ → Fe; E° = -0.036 volt Fe2+ + 2e¯ → Fe; E° = -0.440 volt The standard electrode potential…Chemistry· Electrochemistry· Moderate· figure
22. 22Which of the following curves represents the Henry's law?Chemistry· Moderate· figure
23. 23Peptisation isChemistry· Surface Chemistry· Easy
24. 24The correct IUPAC name of following compound isChemistry· IUPAC Nomenclature· Easy· figure