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. 1The Vander Waals constant for the three gases A, B & C are as shown. [IMAGE] Which of the following gases will behave most ideally around…Chemistry· figure
2. 2In an atom an electron is moving with a speed equal to 600 m/s with an accuracy upto 0.001 with what certainity its position can be…Chemistry· figure
3. 3(C) is: (C)Chemistry· figure
4. 4Which is not true for CO molecule?Chemistry
5. 5Which of the followings represent enantiomerChemistry· figure
6. 6Suppose that a hypothetical H-like atom gives a red Green, blue, & violet line spectrum. Which jump according to figure would give off the…Chemistry· figure
7. 7The heats of neutralization of four acids a, b, c, and d when neutralised against a common strong base are 13.7, 9.4, 11.2 and 12.4 kcal…Chemistry
8. 8The correct order of bond length (C - O) isChemistry· figure
9. 9EAN of the central metal in the complexes K_2[Ni(CN)_4],Chemistry· figure
10. 10CrO_3 dissolves in aqueous NaOH to giveChemistry· figure
11. 11Asseration: A solution of surcose in water is dextroratatory. But on hydrolysis in the presence of little hydrochloric acid, it becomes…Chemistry· figure
12. 12Which of the following compounds was starting material for the oxidation shown below?Chemistry· figure
13. 13has four choicesChemistry
14. 14How many number of mole of R-MgX consume in given structure?Chemistry· figure
15. 15What is the number of Chiral Carbon in the compound C.Chemistry· figure
16. 16The conversion of oxygen to ozone occurs to the extent of 15 only. The mass of ozone that can be prepared from 67.2 L of oxygen at STP will…Chemistry· figure
17. 17The cell: Sn(s) | Sn^2+ || Cu^+ | Cu [IMAGE] is completely discharged. What will be the value ofChemistry· figure
18. 18are INTEGER ANSWER TYPE Questions. (The answer of each of the questions is 2 digits)Chemistry
19. 19From the data provided, calculate the bond energy of a C -- H bond. DH_f of C_2H_2(g) = 225 kJ/mole, DHsublimation of Cgraphite = 705 kJ…Chemistry· figure
20. 20In which of the following pairs both are monobasic, proton donor acid when dissolved in water?Chemistry· figure
21. 21Which of the following gases will have a greater tendency to get adsorbed as compared to remaining gases?Chemistry
22. 22Which of the following is an example of additional polymerization?Chemistry
23. 23When CrCl3 is reacts with excess NaOH solution then green solution "A" is obatined? [IMAGE] The oxidation number of chromium in the…Chemistry· figure
24. 24The element having second highest ionization enthalpy in 3d-series.Chemistry