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. 1In which of the following delocalisation of anion is not possible?Chemistry· Organic Chemistry· Easy
2. 2In which of the following resonance is not possible ?Chemistry· Organic Chemistry· Moderate
3. 3Which of the following compound will not liberate CO_2 gas on reaction with sodium bicarbonate ?Chemistry· Organic Chemistry· Tough· figure
4. 4A particle X moving with certain velocity has a de-Broglie wavelength of 1Aº. If particle and velocity 75 that of will beChemistry· Physical Chemistry· Moderate
5. 5JM-CH-06-Q10Chemistry· Organic Chemistry· Moderate· figure
6. 6${CH}_{3}C \equiv {CCH}_{3}\overset{Na,{NH}_{3}(I)}{\longrightarrow}Q\frac{dil\ Cold\ }{{KMO}_{4}} \longrightarrow R$ If Q is an…Chemistry· Organic Chemistry· Moderate· figure
7. 7Which of the following graph of potential energy represent the unimolecular elimination reaction ?Chemistry· Organic Chemistry· Easy
8. 8The radial probability distribution curve of an orbital of H has 4 local mixima. If orbital has 3 angular node then orbital will beChemistry· Physical Chemistry· Moderate
9. 9[IMAGE] Compound (A) isChemistry· Organic Chemistry· Tough· figure
10. 10In which reactions major product is propane ? (a) PropeneChemistry· Organic Chemistry· Moderate
11. 11[IMAGE] Final product isChemistry· Organic Chemistry· Easy· figure
12. 12The energy required to melt 1g ice is 33J. The number of quanta of radiation of frequency 4.67 ×10^13 sec^-1, that must be absorbed to melt…Chemistry· Physical Chemistry· Easy
13. 13The quantum numbers of for the electron spin representChemistry· Physical Chemistry· Moderate
14. 14A atom forms an ion by the loss of three electrons. The ion has an electronic configuration The symbol of the ion isChemistry· Physical Chemistry· Moderate
15. 15Molecule AX4 have all bond angles equal and molecule is non-polar also then which of the following conclusion is incorrect?Chemistry· Inorganic Chemistry· Moderate
16. 16Given that in H-atom, the transition energy for n = 1 to n = 2 is 10.2 eV, the energy for the same transition in Be^3+ isChemistry· Physical Chemistry· Moderate
17. 17[IMAGE] No. of monochloro structure isomers in products isChemistry· Organic Chemistry· Easy· figure
18. 18How many alkenes give 2-methylbutane on catalytic hydrogenation?Chemistry· Organic Chemistry· Moderate· figure
19. 19Find minimum possible values of missing digits (X, Y, Z) in the following set of quantum numbers and calculate sum of X, Y and Z.…Chemistry· Physical Chemistry· Moderate· figure
20. 20How many of the following molecules has 75 p-character ? BeCl_2(g), BCl_3, SiCl_4, AsF_5, H_2S, PH_3Chemistry· Inorganic Chemistry· Tough
21. 21Consider all the atoms of C_2H_2 are on Z-axis. Find total no. of orbitals which involve in overlapping along Z-axisChemistry· Inorganic Chemistry· Tough
22. 22Select which type of overlapping is responsible for $\pi$-character in Si-N bond of H_3SiNCO?Chemistry· Inorganic Chemistry· Easy
23. 23Which of the following are planar ?Chemistry· Inorganic Chemistry· Moderate
24. 24The number of molecules having two or more $p\pi –d\pi$ bond amongs the following is:…Chemistry· Inorganic Chemistry· Tough