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Chemistry · 2021 · 25 Jul · Shift 2

23 questions from this JEE Main paper
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Chemistry · 2021 · 25 Jul · Shift 2

23 questions from this JEE Main paper

Chemical Bonding and Molecular Structure2 questionsCoordination Compounds1 questionsPeriodic Table and Periodicity1 questionsBasics of Organic Chemistry2 questionsCompounds Containing Nitrogen3 questionsD and F Block Elements3 questionsBiomolecules1 questionsAldehydes Ketones and Carboxylic Acids2 questionsRedox Reactions1 questionsThermodynamics1 questionsStructure of Atom1 questionsHydrocarbons1 questionsChemical Kinetics and Nuclear Chemistry1 questionsChemical Equilibrium1 questionsPractical Organic Chemistry1 questionsSolutions1 questions
  1. Q1.In the following the correct bond order sequence is :
    Chemistry · Chemical Bonding and Molecular Structure · MCQ
  2. Q2.Which one of the following metal complexes is most stable?
    Chemistry · Coordination Compounds · MCQ
  3. Q3.The ionic radii of F− and O2− respectively are 1.33 Ao​ and 1.4 Ao​, while the covalent radius of N is 0.74 Ao​. The correct statement for the ionic radius of N3− from the…
    Chemistry · Periodic Table and Periodicity · MCQ
  4. Q4.The correct decreasing order of densities of the following compounds is : Includes diagram
    Chemistry · Basics of Organic Chemistry · MCQ
  5. Q5.Consider the above reaction, the product "P" is : Includes diagram
    Chemistry · Compounds Containing Nitrogen · MCQ
  6. Q6.A reaction of benzonitrile with one equivalent CH3​MgBr followed by hydrolysis produces a yellow liquid "P". The compound "P" will give positive ​.
    Chemistry · Compounds Containing Nitrogen · MCQ
  7. Q7.The spin only magnetic moments (in BM) for free Ti3+, V2+ and Sc3+ ions respectively are : (At.No. Sc : 21, Ti : 22, V : 23)
    Chemistry · D and F Block Elements · MCQ
  8. Q8.Which one of the following is correct structure for cytosine?
    Chemistry · Biomolecules · MCQ
  9. Q9.Identify the species having one π-bond and maximum number of canonical forms from the following :
    Chemistry · Chemical Bonding and Molecular Structure · MCQ
  10. Q10.Which one of the following metals forms interstitial hydride easily?
    Chemistry · D and F Block Elements · MCQ
  11. Q11.Maleic anhydride can prepared by : Includes diagram
    Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
  12. Q12.[where Et⇒−C2​H5​tBu⇒(CH3​)3​C−] Consider the above reaction sequence, Product "A" and Product "B" formed respectively are : Includes diagram
    Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
  13. Q13.What is the major product "P" of the following reaction? Includes diagram
    Chemistry · Compounds Containing Nitrogen · MCQ
  14. Q14.Identify the process in which change in the oxidation state is five :
    Chemistry · Redox Reactions · MCQ
  15. Q15.Which among the following is the strongest acid ?
    Chemistry · Basics of Organic Chemistry · MCQ
  16. Q16.A system does 200 J of work and at the same time absorbs 150 J of heat. The magnitude of the change in internal energy is ​ J. (Nearest integer)
    Chemistry · Thermodynamics · Numerical
  17. Q17.An accelerated electron has a speed of 5 × 106 ms − 1 with an uncertainty of 0.02%. The uncertainty in finding its location while in motion is x × 10 − 9 m. The value of x is ​. (Nearest integer)…
    Chemistry · Structure of Atom · Numerical
  18. Q18.Number of electrons present in 4f orbital of Ho3+ ion is ​. (Given Atomic No. of Ho = 67)
    Chemistry · D and F Block Elements · Numerical
  19. Q19.Consider the above chemical reaction. The total number of stereoisomers possible for Product 'P' is ​. Includes diagram
    Chemistry · Hydrocarbons · Numerical
  20. Q20.For a chemical reaction A → B, it was found that concentration of B is increased by 0.2 mol L − in 30 min. The average rate of the reaction is ​× 10 − 1 mol L − 1 h − 1. (in nearest integer)
    Chemistry · Chemical Kinetics and Nuclear Chemistry · Numerical
  21. Q21.Assuming that Ba(OH)2​ is completely ionised in aqueous solution under the given conditions the concentration of H3​O+ ions in 0.005 M aqueous solution of Ba(OH)2​ at 298 K is ​× 10 − 12 mol L − 1.…
    Chemistry · Chemical Equilibrium · Numerical
  22. Q22.0.8 g of an organic compound was analyzed by Kjeldahl's method for the estimation of nitrogen. If the percentage of nitrogen in the compound was found to be 42%, then ​ mL of 1 M H2​SO4​ would have been…
    Chemistry · Practical Organic Chemistry · Numerical
  23. Q23.When 3.00 g of a substance 'X' is dissolved in 100 g of CCl4​, it raises the boiling point by 0.60 K. The molar mass of the substance 'X' is ​ g mol − 1. (Nearest integer). [Given Kb for CCl4​ is 5.0 K kg mol…
    Chemistry · Solutions · Numerical