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Chemistry · 2020 · 2 Sep · Shift 2

22 questions from this JEE Main paper

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2020 · 2 Sep · Shift 2
Chemistry

Chemistry · 2020 · 2 Sep · Shift 2

22 questions from this JEE Main paper

Electrochemistry1 questions Some Basic Concepts of Chemistry1 questions Structure of Atom2 questions Redox Reactions1 questions Thermodynamics1 questions Biomolecules1 questions Alcohols Phenols and Ethers2 questions Chemical Bonding and Molecular Structure3 questions Aldehydes Ketones and Carboxylic Acids2 questions Chemical Kinetics and Nuclear Chemistry1 questions Solutions1 questions Coordination Compounds2 questions Practical Organic Chemistry1 questions Haloalkanes and Haloarenes2 questions Periodic Table and Periodicity1 questions

Q1.For the disproportionation reaction 2 $C u^{+}$ (aq) ⇌ $C u$ (s) + $C u^{2 +}$ (aq) at 298 K. ln K (where K is the equilibrium constant) is × 10–1. Given : ( $E_{C u^{2 +} / C u^{+}}^{0} = 0.16 V E_{C u^{+} / C u}^{0} = 0.52 V \frac{R T}{F} = 0.025$ …
Chemistry · Electrochemistry · Numerical
Q2.The ratio of the mass percentages of ‘C & H’ and ‘C & O’ of a saturated acyclic organic compound ‘X’ are 4 : 1 and 3 : 4 respectively. Then, the moles of oxygen gas required for complete combustion of two moles of organic compound…
Chemistry · Some Basic Concepts of Chemistry · Numerical
Q3.The work function of sodium metal is 4.41 $\times$ 10–19 J. If photons of wavelength 300 nm are incident on the metal, the kinetic energy of the ejected electrons will be (h = 6.63 $\times$ 10–34 J s; c = 3 $\times$ 108 m/s) …
Chemistry · Structure of Atom · Numerical
Q4.The oxidation states of transition metal atoms in $K_{2} C r_{2} O_{7}$ , $K M n O_{4}$ and $K_{2} F e O_{4}$ , respectively, are x, y and z. The sum of x, y and z is .
Chemistry · Redox Reactions · Numerical
Q5.The heat of combustion of ethanol into carbon dioxide and water is – 327 kcal at constant pressure. The heat evolved (in cal) at constant volume and 27oC (if all gases behave ideally) is (R = 2 cal mol–1 K–1) .
Chemistry · Thermodynamics · Numerical
Q6.The correct observation in the following reactions is : Includes diagram
Chemistry · Biomolecules · MCQ
Q7.The major product of the following reaction is : Includes diagram
Chemistry · Alcohols Phenols and Ethers · MCQ
Q8.The shape / structure of $[X e F_{5}]^{-}$ and $X e O_{3} F_{2}$ , respectively, are
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q9.An organic compound ‘A’ ( $C_{9} H_{10} O$ ) when treated with conc. $H I$ undergoes cleavage to yield compounds ‘B’ and ‘C’. ‘B’ gives yellow precipitate with $A g N O_{3}$ where as ‘C’ tautomerizes to ‘D’. ‘D’ gives positive iodoform test. ‘A’ could…
Chemistry · Alcohols Phenols and Ethers · MCQ
Q10.The molecular geometry of $S F_{6}$ is octahedral. What is the geometry of $S F_{4}$ (including lone pair(s) of electrons, if any)?
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q11.Two compounds A and B with same molecular formula ( $C_{3} H_{6} O$ ) undergo Grignard’s reaction with methylmagnesium bromide to give products C and D. Products C and D show following chemical tests. C and D respectively are : Includes diagram
Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
Q12.Match the type of interaction in column A with the distance dependence of their interaction energy in column B Includes table
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q13.The results given in the below table were obtained during kinetic studies of the following reaction 2A + B $\to$ C + D X and Y in the given table are respectively : Includes diagram
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q14.The size of a raw mango shrinks to a much smaller size when kept in a concentrated salt solution. Which one of the following processes can explain this?
Chemistry · Solutions · MCQ
Q15.The one that is not expected to show isomerism is :
Chemistry · Coordination Compounds · MCQ
Q16.Simplified absorption spectra of three complexes ((i), (ii) and (iii)) of $M n^{+}$ ion are provided below; their $λ$ max values are marked as A, B and C respectively. The correct match between the complexes and their $λ$ max… Includes diagram
Chemistry · Coordination Compounds · MCQ
Q17.If you spill a chemical toilet cleaning liquid on your hand, your first aid would be
Chemistry · Practical Organic Chemistry · MCQ
Q18.The number of subshells associated with n = 4 and m = –2 quantum numbers is
Chemistry · Structure of Atom · MCQ
Q19.The major product obtained from E2 - elimination of 3-bromo-2-fluoropentane is
Chemistry · Haloalkanes and Haloarenes · MCQ
Q20.Three elements X, Y and Z are in the 3rd period of the periodic table. The oxides of X, Y and Z, respectively, are basic, amphoteric and acidic. The correct order of the atomic numbers of X, Y and Z is :
Chemistry · Periodic Table and Periodicity · MCQ
Q21.Consider the reaction sequence given below: Which of the following statements is true? Includes diagram
Chemistry · Haloalkanes and Haloarenes · MCQ
Q22.Arrange the following labelled hydrogens in decreasing order of acidity : Includes diagram
Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ