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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 van't Hoff factor for 0.1 M Ba(NO3)2 solution is 2.74. The degree of dissociation isChemistry· Physical Chemistry· Moderate
  2. 2The Henry's law constant for the solubility of N2 gas in water at 298 K is 1.0 × 105 atm. The mole fraction of N2 in air is 0.8. The number…Chemistry· Physical Chemistry· Moderate
  3. 31.22 g of benzoic acid is dissolved in 100 g of acetone and 100 g of benzene separately. Boiling point of the solution in acetone increases…Chemistry· Physical Chemistry· Tough
  4. 4Water is added to the solution M such that the mole fraction of water in the solution becomes 0.9. The boiling point of this solution isChemistry· Physical Chemistry· Moderate
  5. 5Benzene and toluene form nearly ideal solutions. At 20ºC, the vapour pressure of benzene is 75 torr and that of toluene is 22 torr. The…Chemistry· Physical Chemistry· Moderate
  6. 66.02 × 1020 molecules of urea are present in 100 ml of its solution. The concentration of urea solution is: lkUnzrkChemistry· Physical Chemistry· Moderate
  7. 7The number of P--O--P bonds in cyclic trimetaphosphoric acid is: pØh; VªkbZesVkQkWLQksfjd vEyChemistry· Inorganic Chemistry· Moderate· figure
  8. 8The equilibrium constant for the reaction, SO3(g)[IMAGE] SO2(g) + $\frac{1}{2}$ O2(g) is KC = 4.9 × 10-2. The value of KC for the reaction…Chemistry· Physical Chemistry· Moderate· figure
  9. 9Determine solubility of PbI2 in a 0.1 M solution of Pb(NO3)2.is ( ___ × 10-4). (Ksp of PbI2 = 7.1 × 10-9) Pb(NO3)2 ds 0.1 M PbI2 ( ___ ×…Chemistry· Physical Chemistry· Moderate· figure
  10. 108 × 10-6 M AgNO3 solution is gradually added in 1 L of 10-4 M KCl solution. Upto what volume of AgNO3 solution being added (in L),…Chemistry· Physical Chemistry· Easy
  11. 11The solubility product of BaCrO4 is 2.4 × 10-10 M2. The maximum concentration of Ba(NO3)2 possible without precipitation in a 6 × 10-4 M…Chemistry· Physical Chemistry· Moderate
  12. 12The solubility of Ag2CO3 in water ­­is 1.26 × 10-4 mole/litre. What is its solubility in 0.02 M Na2CO3 solution ? Assume no hydrolysis of…Chemistry· Physical Chemistry· Moderate· figure
  13. 13Benzene and naphthalene form an ideal solution at room temperature. For this process, the true statement(s) is (are): bl izØeChemistry· Physical Chemistry· Moderate
  14. 14The solubility product of a salt having general formula MX_2, in water is: 4 × 10^-12. The concentration of M^2+ ions in the saturated…Chemistry· Physical Chemistry· Moderate· figure
  15. 15Which of the following statement is wrong?Chemistry· Inorganic Chemistry· Moderate
  16. 16Which of the following is the wrong statement ?Chemistry· Inorganic Chemistry· Moderate· figure
  17. 17The reaction, 3ClO- (aq) → ClO3- (aq) + 2Cl- (aq) is an example ofChemistry· Inorganic Chemistry· Easy· figure
  18. 18In case of nitrogen, NCl3 is possible but no NCl5 while in case of phosphorus, PCl3 as well as PCl5 are possible. It is due toChemistry· Inorganic Chemistry· Moderate
  19. 19The substance used in holmes singnals of the ship is a mixture of: tgktkssa gksYe flXuy (holmes singnals)Chemistry· Inorganic Chemistry· Moderate
  20. 20How many moles of potassium chlorate need to be heated to produce 11.2 liter oxygen at N.T.P.Chemistry· Physical Chemistry· Moderate
  21. 21The IUPAC name of neopentane isChemistry· Organic Chemistry· Moderate· figure
  22. 22Aspirin is known asChemistry· Organic Chemistry· Moderate· figure
  23. 23In the following benzyl/allyl system R - CH = CH2 and [IMAGE] (R is alkyl group) Then decreasing order of inductive effect isChemistry· Organic Chemistry· Moderate· figure
  24. 24Among the following compounds, the most acidic isChemistry· Organic Chemistry· Moderate· figure
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