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. 1Molecular formula C3H6O2 have two structures A & B. Structure A releases CO2 gas with NaHCO3 but B does not. Compound B is fruity smelling…Chemistry· Organic Chemistry· Moderate
  2. 2Which of the following reactions lead to chemical inertnessChemistry· Inorganic Chemistry· Moderate
  3. 3On dissolving moderate amount of sodium metal in liquid NH3 at low temperature, which one of the following does not occur?Chemistry· Inorganic Chemistry· Easy
  4. 4The set with correct order of acidity isChemistry· Inorganic Chemistry· Moderate
  5. 5[IMAGE] Where a, b, c, d, e, f, g, h are 3rd period elements. If difference between atomic number of elements b and e is x and difference…Chemistry· Inorganic Chemistry· Moderate· figure
  6. 6Decreasing order of boiling point of I to IV follow Methylformate Ethylformate Iso-propylformate n-propylformate I II III IVChemistry· Organic Chemistry· Easy
  7. 7Calculate $\Delta_{r}G^{\circ}$ for (NH4CI, s) at 310 K. Given:$\ \Delta_{r}H^{\circ}$ (NH4CI, s)= -314.5 $\Delta_{r}C_{p} = 0$…Chemistry· Inorganic Chemistry· Tough
  8. 8A gas obeys the equation of state P(V - b) = RT (The parameter b is a constant). The slope for an isochore will beChemistry· Physical Chemistry· Moderate
  9. 9Excess of silver nitrate is added to a water sample to determine the amount of chloride ion present in the sample. 1.4 g of silver chloride…Chemistry· Physical Chemistry· Easy
  10. 10On mixing equal volumes of 0.1 M AgNO3 & 0.8 M KCN solutions, what of original Ag+ is in the form of free Ag+ ions ? Given: Kd of…Chemistry· Physical Chemistry· Moderate
  11. 11A2(g) and B2(g) having partial pressures 60 mm of Hg & 42 mm of Hg respectively, are present in a closed vessel. At equilibrium, partial…Chemistry· Physical Chemistry· Tough
  12. 12A gaseous mixture of three gases A, B and C has a pressure of 10 atm. The total number of moles of all the gases is 10. If the partial…Chemistry· Physical Chemistry· Moderate
  13. 13Calculate the energy required to excite one litre Hydrogen gas at 1 atm and 298 K to first excited state of atomic hydrogen. The energy for…Chemistry· Physical Chemistry· Tough
  14. 14The number of isomers of dibromobiphenyl (Biphenyl - C6H5) isChemistry· Organic Chemistry· Tough· figure
  15. 15What volume of 98 sulphuric acid (in ml) should be mixed with water to obtain 200 mL of 15 solution of sulphuric acid by weight ? Given…Chemistry· Physical Chemistry· Moderate
  16. 16Molar conductivity of 0.04 solution at 298 k is 200 Scm2mole-1. A conductivity cell which is filled with MgCl2 have area of cross-section…Chemistry· Physical Chemistry· Moderate
  17. 17Acetylene may be prepared by electrolysis ofChemistry· Organic Chemistry· Moderate· figure
  18. 18Sum of total no. of stereoisomers (A) and total no. of fractions (B) for the compound [IMAGE] isChemistry· Organic Chemistry· Moderate· figure
  19. 19(X) is the product of cross aldol condensation between benzaldehyde (C6H5CHO) and acetone. What is its structure ?Chemistry· Organic Chemistry· Moderate· figure
  20. 20, Product (X) in this reaction isChemistry· Organic Chemistry· Tough· figure
  21. 21Which one of the following bases is not present in DNA ?Chemistry· Organic Chemistry· Moderate
  22. 22Complete the following reactionsChemistry· Organic Chemistry· Moderate· figure
  23. 23Which method of purification is represented by the equations ?Chemistry· Inorganic Chemistry· Moderate· figure
  24. 24Predict the hybridisation and geometry of the following complexes.Chemistry· Inorganic Chemistry· Moderate· figure
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