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Chemistry · 2006 · Shift 0

51 questions from this JEE Main paper

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2006 · Shift 0
Chemistry

Chemistry · 2006 · Shift 0

51 questions from this JEE Main paper

Thermodynamics4 questions Chemical Equilibrium2 questions Electrochemistry3 questions Basics of Organic Chemistry4 questions Coordination Compounds4 questions Alcohols Phenols and Ethers5 questions Haloalkanes and Haloarenes3 questions Aldehydes Ketones and Carboxylic Acids2 questions Biomolecules2 questions Hydrocarbons1 questions D and F Block Elements3 questions Chemical Kinetics and Nuclear Chemistry4 questions Solutions2 questions Redox Reactions1 questions Periodic Table and Periodicity2 questions P Block Elements1 questions Some Basic Concepts of Chemistry2 questions Structure of Atom3 questions Chemical Bonding and Molecular Structure3 questions

Q1.The standard enthalpy of formation $Δ_{f} H^{o}$ at 298 K for methane, $C H_{4}$ (g), is –74.8 kJ mol–1. The additional information required to determine the average energy for C – H bond formation would be :
Chemistry · Thermodynamics · MCQ
Q2.An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If Ti is the initial temperature and Tf is the final temperature, which of the following statements is correct?
Chemistry · Thermodynamics · MCQ
Q3.( $Δ H - Δ U$ ) for the formation of carbon monoxide (CO) from its elements at 298 K is : (R = 8.314 J K–1 mol–1)
Chemistry · Thermodynamics · MCQ
Q4.The enthalpy changes for the following processes are listed below : $C l_{2}$ (g) = 2 $C l$ (g), 242.3 kJ mol–1 $I_{2}$ (g) = 2 $I$ (g), 151.0 kJ mol–1 $I C l$ (g) = $I$ (g) + $C l$ (g), 211.3 kJ mol–1 $I_{2}$ (s) = $I_{2}$ (g), 62.76 kJ mol–1 Given that the…
Chemistry · Thermodynamics · MCQ
Q5.Phosphorus pentachloride dissociates as follows, in a closed reaction vessel $P C l_{5}$ (g) $⇋$ $P C l_{3}$ (g) + $C l_{2}$ (g) If total pressure at equilibrium of the reaction mixture is P and degree of dissociation of $P C l_{5}$ is…
Chemistry · Chemical Equilibrium · MCQ
Q6.The equilibrium constant for the reaction $S O_{3}$ (g) $⇋$ $S O_{2}$ (g) + $\frac{1}{2}$ $O_{2}$ (g) is Kc = 4.9 $\times$ 10–2. The value of Kc for the reaction 2 $S O_{2}$ (g) + $O_{2}$ (g) $⇋$ 2 $S O_{3}$ (g) will be :
Chemistry · Chemical Equilibrium · MCQ
Q7.Given the data at 25oC, $A g$ + $I^{-}$ $\to$ $A g I$ + e- , Eo = 0.152 V $A g$ $\to$ $A g^{+}$ + e-, Eo = -0.800 V What is the value of log Ksp for $A g I$ ? (2.303 RT/F = 0.059 V)
Chemistry · Electrochemistry · MCQ
Q8.The increasing order of stability of the following free radicals is
Chemistry · Basics of Organic Chemistry · MCQ
Q9.Increasing order of stability among the three main conformations (i.e. Eclipse, Anti, Gauche) of 2-fluoroethanol is
Chemistry · Basics of Organic Chemistry · MCQ
Q10. $C H_{3} B r$ + $N u^{-}$ $\to$ $C H_{3}$ - Nu + $B r^{-}$ The decreasing order of the rate of the above reaction with nucleophiles (Nu–) A to D is [Nu– = (A) PhO–, (B) AcO–, (C) HO–, (D) $C H_{3} O$ –]
Chemistry · Basics of Organic Chemistry · MCQ
Q11.How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a $C a^{2 +}$ ion?
Chemistry · Coordination Compounds · MCQ
Q12.Phenyl magnesium bromide reacts with methanol to give
Chemistry · Alcohols Phenols and Ethers · MCQ
Q13.Fluorobenzene ( $C_{6} H_{5} F$ ) can be synthesized in the laboratory
Chemistry · Haloalkanes and Haloarenes · MCQ
Q14.Reaction of trans-2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces
Chemistry · Haloalkanes and Haloarenes · MCQ
Q15. $H B r$ reacts with $C H_{2} = C H - O C H_{3}$ under anhydrous conditions at room temperature to give
Chemistry · Alcohols Phenols and Ethers · MCQ
Q16.The increasing order of the rate of $H C N$ addition to compounds A – D is (A) $H C H O$ (B) $C H_{3} C O C H_{3}$ (C) $P h C O C H_{3}$ (D) $P h C O P h$
Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
Q17.The term anomers of glucose refers to
Chemistry · Biomolecules · MCQ
Q18.The pyrimidine bases present in DNA are
Chemistry · Biomolecules · MCQ
Q19.In $F e (C O)_{5}$ , the Fe – C bond possesses :
Chemistry · Coordination Compounds · MCQ
Q20.The $I U P A C$ name of the compound shown below is : Includes diagram
Chemistry · Basics of Organic Chemistry · MCQ
Q21.The alkene formed as a major product in the above elimination reaction is Includes diagram
Chemistry · Hydrocarbons · MCQ
Q22.The structure of the major product formed in the following reaction is Includes diagram
Chemistry · Haloalkanes and Haloarenes · MCQ
Q23.The structure of the compound that gives a tribromo derivative on treatment with bromine water is
Chemistry · Alcohols Phenols and Ethers · MCQ
Q24.The electrophile involved in the above reaction is Includes diagram
Chemistry · Alcohols Phenols and Ethers · MCQ
Q25.Among the following the one that gives positives iodoform test upon reaction with $I_{2}$ and $N a O H$ is
Chemistry · Alcohols Phenols and Ethers · MCQ
Q26.The correct order of increasing acid strength of the compounds Includes diagram
Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
Q27.A metal, $M$ forms chlorides in its $+ 2$ and $+ 4$ oxidation states. Which of the following statements about these chlorides is correct?
Chemistry · D and F Block Elements · MCQ
Q28.Rate of a reaction can be expressed by Arrhenius equation as: $k = A e^{- E / R T}$ In this equation, E represents
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q29.Among the following mixtures, dipole-dipole as the major interaction, is present in
Chemistry · Solutions · MCQ
Q30.18 g of glucose ( $C_{6} H_{12} O_{6}$ ) is added to 178.2 g of water. The vapour pressure of water for this aqueous solution at 100oC is
Chemistry · Solutions · MCQ
Q31.The molar conductivities $\land_{N a O A c}^{o}$ and $\land_{H C l}^{o}$ and at infinite dilution in water at 25oC are 91.0 and 426.2 Scm2/mol respectively. To calculate $\land_{H O A c}^{o}$ , the additional value required is
Chemistry · Electrochemistry · MCQ
Q32.Which of the following chemical reactions depicts the oxidizing behaviour of $H_{2} S O_{4}$ ?
Chemistry · Redox Reactions · MCQ
Q33.Resistance of a conductivity cell filled with a solution of an electrolyte of concentration 0.1 M is 100 $Ω$ . The conductivity of this solution is 1.29 S m–1. Resistance of the same cell when filled with 0.2 M of the same solution is…
Chemistry · Electrochemistry · MCQ
Q34.A reaction was found to be second order with respect to the concentration of carbon monoxide. If the concentration of carbon monoxide is doubled, with everything else kept the same, the rate of reaction will
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q35.In the transformation of $_{92}^{238} U$ to $_{92}^{234} U$ , if one emission is an α-particle, what should be the other emission(s)?
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q36.The following mechanism has been proposed for the reaction of $N O$ with $B r_{2}$ to form $N O B r$ : $N O$ (g) + $B r_{2}$ (g) $⇋$ $N O B r_{2}$ (g) $N O B r_{2}$ (g) + $N O$ (g) $\to$ 2 $N O B r$ (g) If the second step is the rate determining…
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q37.The increasing order of the first ionization enthalpies of the elements B, P, S and F (lowest first) is :
Chemistry · Periodic Table and Periodicity · MCQ
Q38.Which of the following statements is true?
Chemistry · P Block Elements · MCQ
Q39.The “spin-only” magnetic moment [in units of Bohr magneton, (µB)] of $N i^{2 +}$ in aqueous solution would be : (Atomic number of Ni = 28)
Chemistry · D and F Block Elements · MCQ
Q40.Lanthanoid contraction is caused due to :
Chemistry · D and F Block Elements · MCQ
Q41.The IUPAC name for the complex $[C o (N O_{2}) (N H_{3})_{5}]$ Cl $_{2}$ is
Chemistry · Coordination Compounds · MCQ
Q42.Nickel (Z = 28) combines with a uninegative monodentate ligand X– to form a paramagnetic complex $[N i X_{4}]^{2 -}$ . The number of unpaired electron(s) in the nickel and geometry of this complex ion are, respectively
Chemistry · Coordination Compounds · MCQ
Q43.How many moles of magnesium phosphate $M g_{3} (P O_{4})_{2}$ will contain 0.25 mole of oxygen atoms?
Chemistry · Some Basic Concepts of Chemistry · MCQ
Q44.Density of a 2.05M solution of acetic acid in water is 1.02 g/mL The molality of the solution is
Chemistry · Some Basic Concepts of Chemistry · MCQ
Q45.Uncertainty in the position of an electron (mass = 9.1 $\times$ 10-31 kg) moving with a velocity 300 ms-1, accurate upto 0.001% will be (h = 6.63 $\times$ 10-34 Js)
Chemistry · Structure of Atom · MCQ
Q46.According to Bohr's theory, the angular momentum of an electron in 5th orbit is
Chemistry · Structure of Atom · MCQ
Q47.Which of the following sets of ions represents a collection of isoelectronic species?
Chemistry · Structure of Atom · MCQ
Q48.Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements gives the correct picture?
Chemistry · Periodic Table and Periodicity · MCQ
Q49.Which of the following molecules/ions does not contain unpaired electrons?
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q50.In which of the following molecules/ions are all the bonds not equal?
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q51.The decreasing values of bond angles from $N H_{3}$ (106o) to $S b H_{3}$ (91o ) down group-15 of the periodic table is due to
Chemistry · Chemical Bonding and Molecular Structure · MCQ