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Chemistry · 2003 · Shift 0

64 questions from this JEE Main paper

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2003 · Shift 0
Chemistry

Chemistry · 2003 · Shift 0

64 questions from this JEE Main paper

Ionic Equilibrium3 questions Thermodynamics5 questions Chemical Equilibrium2 questions Basics of Organic Chemistry4 questions Hydrocarbons2 questions Alcohols Phenols and Ethers2 questions Aldehydes Ketones and Carboxylic Acids2 questions Compounds Containing Nitrogen2 questions Biomolecules2 questions D and F Block Elements8 questions Haloalkanes and Haloarenes1 questions Periodic Table and Periodicity4 questions P Block Elements2 questions Solutions3 questions Electrochemistry5 questions Chemical Kinetics and Nuclear Chemistry5 questions Coordination Compounds3 questions Chemical Bonding and Molecular Structure3 questions Some Basic Concepts of Chemistry2 questions Structure of Atom4 questions

Q1.Which one of the following statements is not true?
Chemistry · Ionic Equilibrium · MCQ
Q2.The internal energy change when a system goes from state A to B is 40 kJ/mole. If the system goes from A to B by a reversible path and returns to state A by an irreversible path what would be the net change in internal energy?
Chemistry · Thermodynamics · MCQ
Q3.If at 298 K the bond energies of C - H, C - C, C = C and H - H bonds are respectively 414, 347, 615 and 435 kJ/mol, the value of enthalpy change for the reaction $H_{2} C = C H_{2}$ (g) + $H_{2}$ (g) $\to$ $H_{3} C - C H_{3}$ (g) at 298 K will be :
Chemistry · Thermodynamics · MCQ
Q4.In an irreversible process taking place at constant T and P and in which only pressure-volume work is being done, the change in Gibbs free energy (dG) and change in entropy (dS), satisfy the criteria :
Chemistry · Thermodynamics · MCQ
Q5.The correct relationship between free energy change in a reaction and the corresponding equilibrium constant Kc is :
Chemistry · Thermodynamics · MCQ
Q6.The enthalpy change for a reaction does not depend upon :
Chemistry · Thermodynamics · MCQ
Q7.The solubility in water of a sparingly soluble salt $A B_{2}$ is 1.0 $\times$ 10-5 mol L-1. Its solubility product number will be :
Chemistry · Ionic Equilibrium · MCQ
Q8.Consider the reaction equilibrium 2 $S O_{2}$ (g) + $O_{2}$ (g) $⇋$ 2 $S O_{3}$ (g); $Δ H^{o}$ = -198 kJ One the basis of Le Chatelier's principle, the condition favourable for the forward reaction is :
Chemistry · Chemical Equilibrium · MCQ
Q9.For the reaction equilibrium $N_{2} O_{4}$ (g) $⇋$ 2 $N O_{2}$ (g) the concentrations of $N_{2} O_{4}$ and $N O_{2}$ at equilibrium are 4.8 $\times$ 10-2 and 1.2 $\times$ 10-2 mol L-1 respectively. The value of Kc for the reaction is
Chemistry · Chemical Equilibrium · MCQ
Q10.When rain is accompanied by a thunderstorm, the collected rain water will have a pH value :
Chemistry · Ionic Equilibrium · MCQ
Q11.The IUPAC name of $C H_{3} C O C H (C H_{3})_{2}$ is
Chemistry · Basics of Organic Chemistry · MCQ
Q12.In the anion HCOO $-$ the two carbon-oxygen bonds are found to be of equal length. What is the reason for it?
Chemistry · Basics of Organic Chemistry · MCQ
Q13.The general formula $C_{n} H_{2 n} O_{2}$ could be for open chain
Chemistry · Basics of Organic Chemistry · MCQ
Q14.On mixing a certain alkane with chlorine and irradiating it with ultravioletlight, it forms only one monochloroalkane. This alkane could be
Chemistry · Hydrocarbons · MCQ
Q15.Butene-1 may be converted to butane by reaction with
Chemistry · Hydrocarbons · MCQ
Q16.During dehydration of alcohols to alkenes by heating with conc. $H_{2} S O_{4}$ the initiation step is
Chemistry · Alcohols Phenols and Ethers · MCQ
Q17.When $C H_{2}$ = $C H$ - $C O O H$ is reduced with $L i A l H_{4}$ , the compound obtained will be
Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
Q18.The correct order of increasing basic nature for the bases $N H_{3}$ , $C H_{3} N H_{2}$ and $(C H_{3})_{2} N H$ is
Chemistry · Compounds Containing Nitrogen · MCQ
Q19.Ethyl isocyanide on hydrolysis in acidic medium generates
Chemistry · Compounds Containing Nitrogen · MCQ
Q20.Complete hydrolysis of cellulose gives
Chemistry · Biomolecules · MCQ
Q21.Which one of the following statements is correct?
Chemistry · D and F Block Elements · MCQ
Q22.Bottles containing $C_{6} H_{5} l$ and $C_{6} H_{5} C H_{2} I$ lost their original labels. They were labelled A and B for testing A and B were separately taken in test tubes and boiled with $N a O H$ solution. The end solution in each tube was made acidic…
Chemistry · Haloalkanes and Haloarenes · MCQ
Q23.Among the following four structures $i$ to $i v,$ it is true that Includes diagram
Chemistry · Basics of Organic Chemistry · MCQ
Q24.The reduction in atomic size with increase in atomic number is a characteristic of elements of
Chemistry · Periodic Table and Periodicity · MCQ
Q25.The atomic numbers of Vanadium (V), Chromium (cr), Manganese (Mn) and Iron (Fe), respectively, $23, 24, 25$ and $26$ . Which one of these may be expected to have the higher second ionization enthalpy?
Chemistry · Periodic Table and Periodicity · MCQ
Q26.The reaction of chloroform with alcoholic $K O H$ and p-toluidine forms
Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
Q27.The reason for double helical structure of $D N A$ is operation of
Chemistry · Biomolecules · MCQ
Q28.A red solid is insolvable in water. However it becomes soluble if some $K I$ is added to water. Heating the red solid in a test tube results in liberation of some violet colored fumes and droplets of a metal appear on the cooler parts…
Chemistry · D and F Block Elements · MCQ
Q29.Which one of the following substances has the highest proton affinity?
Chemistry · P Block Elements · MCQ
Q30.A pressure cooker reduces cooking time for food because
Chemistry · Solutions · MCQ
Q31.In a 0.2 molal aqueous solution of a weak acid HX the degree of ionization is 0.3. Taking kf for water as 1.85, the freezing point of the solution will be nearest to
Chemistry · Solutions · MCQ
Q32.If liquids A and B form an ideal solution
Chemistry · Solutions · MCQ
Q33.For a cell reaction involving a two-electron change, the standard e.m.f. of the cell is found to be 0.295 V at 25oC. The equilibrium constant of the reaction at 25oC will be
Chemistry · Electrochemistry · MCQ
Q34.Standard reduction electrode potentials of three metals A,B&C are respectively +0.5 V, -3.0 V & -1.2 V. The reducing, powers of these metals are
Chemistry · Electrochemistry · MCQ
Q35.When during electrolysis of a solution of $A g N O_{3}$ , 9650 coulombs of charge pass through the electroplating bath, the mass of silver deposited on the cathode will be :
Chemistry · Electrochemistry · MCQ
Q36.For the redox reaction $Z n$ (s) + $C u^{2 +}$ (0.1 M) $\to$ $Z n^{2 +}$ (1M) + $C u$ (s) taking place in a cell, $E_{ce l l}^{o}$ is 1.10 volt. Ecell for the cell will be ( $2.303 \frac{R T}{F}$ = 0.0591)
Chemistry · Electrochemistry · MCQ
Q37.Several blocks of magnesium are fixed to the bottom of a ship to :
Chemistry · Electrochemistry · MCQ
Q38.The radionucleide $_{90}^{234} T h$ undergoes two successive $β$ -decays followed by one $α$ -decay. The atomic number and the mass number respectively of the resulting radionucleide are
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q39.The half-life of a radioactive isotope is three hours. If the initial mass of the isotope were 256 g, the mass of it remaining undecayed after 18 hours would be
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q40.In respect of the equation k = Ae-Ea/RT in chemical kinetics, which one of the following statements is correct?
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q41.The rate law for a reaction between the substances A and B is given by Rate = k[A]n [B]m On doubling the concentration of A and halving the concentration of B, the ratio of the new rate to the earlier rate of the reaction will be as
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q42.For the reaction system: 2 $N O$ (g) + $O_{2}$ (g) $\to$ 2 $N O_{2}$ (g) volume is suddenly reduce to half its value by increasing the pressure on it. If the reaction is of first order with respect to $O_{2}$ and second order with respect to $N O$ , the…
Chemistry · Chemical Kinetics and Nuclear Chemistry · MCQ
Q43.For making good quality mirrors, plates of float glass are used. These are obtained by floating molten glass over a liquid metal which does not solidify before glass. The metal used can be :
Chemistry · D and F Block Elements · MCQ
Q44.Glass is a :
Chemistry · P Block Elements · MCQ
Q45.What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid?
Chemistry · D and F Block Elements · MCQ
Q46.Which one of the following nitrates will leave behind a metal on strong heating?
Chemistry · D and F Block Elements · MCQ
Q47.The atomic numbers of vanadium (V), Chromium (Cr), manganese (Mn) and iron (Fe) are respectively 23, 24, 25 and 26. Which one of these may be expected to have the highest second ionization enthalpy?
Chemistry · D and F Block Elements · MCQ
Q48.The radius of $L a^{3 +}$ (Atomic number of La = 57) is 1.06 Å. Which one of the following given values will be closest to the radius of $L u^{3 +}$ (Atomic number of Lu = 71) ?
Chemistry · D and F Block Elements · MCQ
Q49.Ammonia forms the complex ion $[C u (N H_{3})_{4}]^{2 +}$ with copper ions in alkaline solutions but not in acidic solutions. What is the reason for it?
Chemistry · Coordination Compounds · MCQ
Q50.One mole of the complex compound $C o (N H_{3})_{5} C l_{3}$ , gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with two moles of $A g N O_{3}$ solution to yield two moles of $A g C l$ (s). The structure of the complex is :
Chemistry · Coordination Compounds · MCQ
Q51.In the coordination compound, $K_{4} [N i (C N)_{4}]$ , the oxidation state of nickel is :
Chemistry · Coordination Compounds · MCQ
Q52.Which one of the following compounds has the smallest bond angle in its molecule?
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q53.What volume of hydrogen gas at 273 K and 1 atm pressure will be consumed in obtaining 21.6 g of elemental boron (atomic mass = 10.8) from the reduction of boron trichloride by hydrogen?
Chemistry · Some Basic Concepts of Chemistry · MCQ
Q54.25 ml of a solution of barium hydroxide on titration with a 0.1 molar solution of hydrochloric acid gave a litre value of 35 ml. The molarity of barium hydroxide solution was
Chemistry · Some Basic Concepts of Chemistry · MCQ
Q55.The number of d-electrons retained in $F e^{2 +}$ (At no of Fe = 26) ion is :
Chemistry · D and F Block Elements · MCQ
Q56.The orbital angular momentum for an electron revolving in an orbit is given by $l (l + 1) \frac{h}{2 π}$ . This momentum for an s-electron will be given by
Chemistry · Structure of Atom · MCQ
Q57.Which one of the following groupings represents a collection of isoelectronic species? (At. nos. : Cs : 55, Br : 35)
Chemistry · Structure of Atom · MCQ
Q58.In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen
Chemistry · Structure of Atom · MCQ
Q59.The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 meters per second is approximately
Chemistry · Structure of Atom · MCQ
Q60.According to the Periodic Law of elements, the variation in properties of elements is related to their
Chemistry · Periodic Table and Periodicity · MCQ
Q61.Which one of the following is an amphoteric oxide?
Chemistry · Periodic Table and Periodicity · MCQ
Q62.An ethar is more volatile than an alcohol having the same molecular formula. This is due to
Chemistry · Alcohols Phenols and Ethers · MCQ
Q63.Which one of the following pairs of molecules will have permanent dipole moments for both members
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q64.The pair of species having identical shapes for molecules of both species is
Chemistry · Chemical Bonding and Molecular Structure · MCQ