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JEE Main practice questions

NTA-style Physics, Chemistry and Maths MCQs with solutions. 2,688 questions in the bank.

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  1. 1The value of Kp for the reaction, $2H_{2}O(g) + 2{Cl}_{2}(g) \rightleftharpoons 4HCl(g) + O_{2}(g)$ is 0.03 atm at 427º C, when the partial…Chemistry· Physical Chemistry· Moderate
  2. 22 mole each of SO_3, CO, SO_2 and CO_2 is taken in a one lit. Vessel. If KC for ${SO}_{3}(g) + CO(g) \rightleftharpoons {SO}_{2}(g) +…Chemistry· Physical Chemistry· Moderate
  3. 3Equilibrium constant for the reactions, ${NO}_{2} + {SO}_{2} \rightleftharpoons {SO}_{3} + NO$ is $2{SO}_{3} \rightleftharpoons 2{SO}_{2} +…Chemistry· Physical Chemistry· Moderate· figure
  4. 4The degree of dissociation of SO_3 is a at equilibrium pressure P_0. Kp for $2{SO}_{3}(g) \rightleftharpoons 2{SO}_{2}(g) + O_{2}(g)$ isChemistry· Physical Chemistry· Tough
  5. 5What is the minimum mass of CaCO_3 (s), below which it decomposes completely, required to establish equilibrium in a 6.50 litre container…Chemistry· Physical Chemistry· Tough
  6. 6(a)$\ {CuSO}_{4}.5H2O(s) \rightleftharpoons {CuSO}_{4} \cdot 3H_{2}O(s) + 2H_{2}O(g)$ K_P = 4 × 10^-4 atm^2 (b)$\ {Na}_{2}{SO}_{4} \cdot…Chemistry· Physical Chemistry· Moderate· figure
  7. 7C_6 H_12 (P) has two types of alkenes that can be reduced to one type of C_6H_14 (Q). Q is: C_6 H_12 (P) nks rjg dh,Ydhu tks fd,d rjg,Ydsu…Chemistry· Organic Chemistry· Moderate· figure
  8. 8Which of the following compounds on hydrolysis gives propyne ?Chemistry· Organic Chemistry· Moderate· figure
  9. 9Match the reactants given in Column-I with the reagent given in Column-II for the preparation of cyclobutane Column-I Column-II (A) [IMAGE]…Chemistry· Organic Chemistry· Tough· figure
  10. 101-Bromo-3-chlorocyclobutane will react with two moles of Na in ether producing? 1-czkseks&3&Dyksjks Na ds nks eksyChemistry· Organic Chemistry· Moderate· figure
  11. 11Match the reactants in column I with product in column II: Column I Column II dkWye I dkWye II (A) CaC_2 + H_2O (p) CH_3 - C $\equiv$ C -…Chemistry· Organic Chemistry· Tough· figure
  12. 12Write the major product of following reactions.Chemistry· Organic Chemistry· Moderate· figure
  13. 13But-1-ene may be converted to butane by reaction with: C;wV-1-bZuChemistry· Organic Chemistry· Moderate· figure
  14. 14Write the major product of following reactions.Chemistry· Organic Chemistry· Moderate· figure
  15. 15Write the major product of following reactions. Ph - Br + CH_3 - Br [IMAGE] (report mixture) Ph - Br + CH_3 - BrChemistry· Organic Chemistry· Moderate· figure
  16. 16[IMAGE] ([X] gks ldrkChemistry· Organic Chemistry· Moderate· figure
  17. 17A metallic carbide on treatment with water gives a colourless gas which burns readily in air and gives a precipitate with ammonical silver…Chemistry· Organic Chemistry· Moderate· figure
  18. 18Which of the following alkanes can be synthesized by the Wurtz reaction in good yield ?]Chemistry· Organic Chemistry· Moderate]
  19. 19Which of the following compounds on hydrolysis gives propyne ?Chemistry· Organic Chemistry· Moderate
  20. 20The major product obtained in the reactionChemistry· Organic Chemistry· Moderate· figure
  21. 21[IMAGE] P (major), P is: [IMAGE] P (eq[;), PChemistry· Organic Chemistry· Tough· figure
  22. 22The number of monochloro derivatives of isohexane is (Only structural isomers) vkblks gsDlsuChemistry· Organic Chemistry· Easy· figure
  23. 23What will be the least molecular mass of an alkane which is optically active?,YdsuChemistry· Organic Chemistry· Moderate· figure
  24. 24The number of $\pi$-bonds present in pent-1-en-4-yne is: isUV-1-bZu-4-vkbZu v.kqvksa $\pi$cU/kksaChemistry· Organic Chemistry· Easy
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