Practice/Question bank/JEE Main

JEE Main practice questions

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

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  1. 1A reaction, which is second order, has a rate constant of [IMAGE]. If the initial conc. of the reactant is 0.2 M. how long will it take for…Chemistry· Chemical Kinetics· Moderate· figure
  2. 2How many positional isomers are possible for dimethylcyclohexane?Chemistry· Sub· Moderate· figure
  3. 3How many spherical balls of radii 2 cm can be placed completely inside a cubical box of edge = 8 cm ?Chemistry· Easy· figure
  4. 4Consider the cell [IMAGE] The measured EMF of the cell is 1.0 V. What is the value of x ? [IMAGE]Chemistry· Electrochemistry· Tough· figure
  5. 5An ideal solution contains two volatile liquids A (pº = 100 torr) and B (pº = 200 torr). If mixture contain 1 mole of A and 4 mole of B…Chemistry· Electrochemistry· Moderate· figure
  6. 6Two substances $A\ (t_{1/2} = 5min)$ and $B\ (t_{1/2} = 15min)$ are taken in such a way that initially The time after which both the…Chemistry· Chemical Kinetics· Tough
  7. 7The correct IUPAC name of following compound isChemistry· IUPAC Nomenclature· Easy· figure
  8. 8What is the relation between 3-Ethylpentane and 3-Methylhexane?Chemistry· Isomerism· Moderate· figure
  9. 9Select incorrect statementChemistry· P-block· Moderate· figure
  10. 10Which Fisher projection represents the given wedge dash structureChemistry· Isomerism· Moderate· figure
  11. 11Which of the following will form only one oxime on reaction with NH2OH solution?Chemistry· Isomerism· Moderate· figure
  12. 12The enantiomeric excess and observed rotation of a mixture containing 6 gm of (+)-2-butanol and 4 (gm) (-)-2-butanol are respectively (If…Chemistry· Isomerism· Tough· figure
  13. 13Which of the following alkyl group has the maximum + I effect?Chemistry· Organic Chemistry· Easy· figure
  14. 14The general formula CnH2nO2 could be for open chainChemistry· IUPAC and Structural Isomerism· Easy
  15. 15A bulb of 40 W is producing a light of wavelength 620 nm with 80 of efficiency then the number of photons emitted by the bulb in 20 seconds…Chemistry· Atomic Structure· Moderate
  16. 16What weights of P4O6 and P4O10 will be produced by the combustion of 31g of P4 in 32g of oxygen leaving no P4 and O2.Chemistry· Mole concept· Tough
  17. 17Which is the correct relationship?Chemistry· Atomic Structure· Moderate
  18. 18Choose the correct order of atomic radii of Fluorine and Neon (in pm) out of the options given belowChemistry· Periodic table· Easy
  19. 19Consider the following statements: (a) Electron density in the XY plane in orbital is zero (b) Electron density in the XY plane in orbital…Chemistry· Atomic Structure· Moderate
  20. 20Which one of the following statements is incorrect in relation to ionisation enthalpy ?Chemistry· Periodic table· Moderate
  21. 21For an electron, with n = 3 has only one radial node. The orbital angular momentum of the electron will beChemistry· Atomic Structure· Moderate
  22. 22At 273 K temp. and 9 atm pressure, the compressibility for a gas is 0.9. The volume of 1 mili-mole of gas at this temperature and pressure…Chemistry· Real Gas· Moderate
  23. 23A gas obeys the equation of state P(V - b) = RT (The parameter b is a constant). The slope for an isochore will beChemistry· Real Gas· Easy
  24. 24Amongst NH3, PH3, AsH3 and SbH3 the one with highest boiling point isChemistry· Chemical Bonding· Moderate
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