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 a metal oxide, there is 20 oxygen by weight. It equivalent weight isChemistry· Physical Chemistry· Easy· figure
2. 2The equivalent weight of [IMAGE] in acidic mediumChemistry· Inorganic Chemistry· Moderate· figure
3. 3Which of the following statement is not true about Mohr's saltChemistry· Inorganic Chemistry· Easy· figure
4. 4The electrolytic cells, one containing acidified ferrous chloride and another acidified ferric chloride are connected in series. The ratio…Chemistry· Physical Chemistry· Easy· figure
5. 54 g of copper was dissolved in concentrated nitric acid. The copper nitrate solution on strong heating gave 5 g of its oxide. The…Chemistry· Physical Chemistry· Moderate· figure
6. 6The molar conductance of at infinite dilution are 126.45,426.16 and [IMAGE] respectively. The molar conductance of [IMAGE] at infinite…Chemistry· Physical Chemistry· Moderate· figure
7. 7When a lead storage battery is dischargedChemistry· Physical Chemistry· Moderate· figure
8. 8Which of the following statement is not true about Mohr's saltChemistry· Inorganic Chemistry· Easy· figure
9. 9Which element gives maximum balanced oxide?Chemistry· Inorganic Chemistry· Easy· figure
10. 10When calomel reacts with [IMAGE] we getChemistry· Inorganic Chemistry· Moderate· figure
11. 11If rate constant is numerically the same for the three reactions of first, second and third order respectively. Assume all the reactions of…Chemistry· Chemical Kinetics· Tough
12. 12At 373 K, a gaseous reaction A→ 2B + C is found to be of first order. Starting with pure A, the total pressure at the end of 10 min was 176…Chemistry· Chemical Kinetics· Moderate· figure
13. 13All the metal ions contain t2g6 eg0 configurations. Which of the following complex will be paramagnetic?Chemistry· Coordination Compounds· Tough· figure
14. 14Bleeding is stopped by the application of ferric chloride. This is becauseChemistry· Surface Chemistry· Moderate
15. 15The decomposition of N2O5 in chloroform was followed by measuring the volume of O2 gas evolved: 2N2O5(CCI4) → 2N2O4(CCI4) + O2(g). The…Chemistry· Chemical Kinetics· Moderate
16. 16The number of unpaired electrons in d6, low spin, octahedral complex isChemistry· Coordination Compounds· Moderate
17. 17The substance undergoes first order decomposition. The decomposition follows two parallel first order reactions as: [IMAGE] K1 = 1.26 ×…Chemistry· Chemical Kinetics· Tough· figure
18. 18For the coagulation of 200 mL of As2S3 solution, 10 mL of 1 M NaCl is required. What is the coagulating value (number of milli moles of…Chemistry· Surface Chemistry· Easy· figure
19. 19The reaction A(s) → 2 B(g) + C(g) is first order. The pressure after 20 min and after very long time are 150 mm Hg and 225 mm Hg. The value…Chemistry· Chemical Kinetics· Tough
20. 20At CMC, the surfactant moleculesChemistry· Surface Chemistry· Easy
21. 21Among the following ions, which one has the highest paramagnetism?Chemistry· Coordination Compounds· Tough· figure
22. 22The donor sites of (EDTA)4- are ?Chemistry· Coordination Compounds· Moderate· figure
23. 23The number of geometrical isomer of [Co(NH3)3(NO3)3] areChemistry· Coordination Compounds· Moderate· figure
24. 24The volume of colloidal particle VC as compared to the volume of a solute particle in a true solution VS could be. Find 10^Vc/ Vs^Chemistry· Surface Chemistry· Moderate