VIT - Unsolved Chemistry - 2010

Vit – Past papers: 

Vit – Past papers CHEMISTRY - UNSOLVED PAPER - 2010

SECTION – I: 

SECTION – I Single Correct Answer Type There are five parts in this question. Four choices are given for each part and one of them is correct. Indicate you choice of the correct answer for each part in your answer-book by writing the letter (a), (b), (c) or (d) whichever is appropriate

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01 The correct formula of the complex tetraammineaquachlorocobalt (III) chloride is a. b. c. d. Problem

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02 The equivalent conductance at infinite dilution of a weak acid such as HF can be determined by extrapolation of measurements on dilute solutions of HCl , HBr and HI can be determined by measurement on very dilute HF solutions can best be determined from measurements on dilute solutions of NaF,NaCl and HCl is an undefined quantity Problem

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Problem 03 The product 'A' is succinic acid melonic acid oxalic acid maleic acid

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Problem 04 For a reaction of type , it is observed that doubling concentration of A causes the reaction rate to be four times as great, but doubling amount of B does not affect the rate. The unit of rate constant is a. b. c. d.

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Problem 05 A chemical reaction was carried out at 320 K and 300 K. The rate constants were found to be respectively. Then a. b. c. d.

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Problem 06 The formula of ethyl carbinol is a. b. c. d.

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Problem 07 Which of the following gives red colour in Victor Meyer's test? n- propyl alcohol Isopropyl alcohol tert -butyl alcohol see-butyl alcohol

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Problem 08 Enthalpy of a compound is equal to its heat of combustion heat of formation heat of reaction heat of solution

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Problem 09 For which one of the following reactions will there be a positive 6.S? a. b. c. d.

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Problem 10 Across the lanthanide series, the basicity of the lanthanide hydroxides increases decreases first increases and then decreases first decreases and then increases

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Problem 11 When p- nitrobromobenzene reacts with sodium ethoxide , the product obtained is p- nitroanisole ethyl phenyl ether p- nitrophenetole no reaction occurs

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Problem 12 . A radioactive element X emits Element X is a. b. c. d.

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Problem 13 For the reaction, the equilibrium constant, at 300 K is 16.0.The value of for is 8 0.25 0.125 32

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Problem 14 Frenkel defect is generally observed in AgBr AgI ZnS All of the above

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Problem 15 Most crystals show good cleavage because their atoms, ions or molecules are weakly bonded together strongly bonded together spherically symmetrical arranged in planes

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Problem 16 exhibit which type of isomerism? Geometrical Optical Linkage Ionisation

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Problem 17 Which of the following compounds is not coloured? a. b. c. d.

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Problem 18 Which of the following is a Waterman aldehyde synthesis? a. b. c. d.

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Problem 19 Aldol is a. b. c. d. None of the above

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Problem 20 Nitrobenzene can be converted into azobenzene by reduction with a. b. c. Zn/ NaOH d.

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Problem 21 The onewhich ideas' basic is a. b. c. d.

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Problem 22 Coordination number of Ni in is 3 6 4 5

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Problem 23 Mg is an important component of which biomolecule occurring extensively in living world? Haemoglobin Chlorophyll Florigen ATP

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Problem 24 Sterling silver is Alloy of 80% Ag + 20% Cu AgCl

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Problem 25 Identify the statement which is not correct regarding It reacts with KI to give iodine It reacts with KCl to give It reacts with NaOH and glucose to give It gives CuO on strong heating in air

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Problem 26 Transition metals usually exhibit highest oxidation states in their chlorides fluorides bromides iodides

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Problem 27 The number of Faradays needed to reduce 4 g equivalents of to Cu metal will be 1 2 1/2 4

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Problem 28 Which one of the following cells can convert chemical energy of H; and Oz directly into electrical energy? Mercury cell Daniela cell Fuel cell Lead storage cell

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Problem 29 On treatment of prop an one with dilute , the product formed is aldol Phorone propionaldehyde 4-hydroxy-4- methyl-2-pentanone

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Problem 30 Which of the following converts ? NaBr NaOBr None of the above

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Problem 31 Which metal, aprons are worn by radiographer to protect him from radiation? Mercury coated apron Lead apron Copper apron Aluminimised apron

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Problem 32 The standard Gibb's free energy change, is related to equilibrium constant, as a. b. c. d.

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Problem 33 The yield of the product in the reaction would be higher at high temperature and high pressure high temperature and low pressure low temperature and high pressure low temperature and low pressure

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Problem 34 In which of the following case, does the reaction go farthest to completion? K = 10 K=1

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Problem 35 Formation of cyanohydrin from a ketone is an example of electrophilie addition nucleophilic addition nucleophilic substitution electrophilic substitution

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Problem 36 Glycerol on treatment with oxalic acid at forms formic acid allyl alcohol acrolein

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Problem 37 The activity of an old piece of wood is just 25% of the fresh piece of wood. If of C-14 is 6000 yr, the age of piece of wood is 6000 yr 3000 yr 9000 yr 12000 yr

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Problem 38 The radius of is 95 pm and that of ion is 181 pm. Hence, the coordination number of will be 4 6 8 unpredictable

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Problem 39 The reaction , in the presence of , gives the following product a. b. c. d.

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Problem 40 The fatty acid which shows reducing property is acetic acid Ethiopic acid oxalic acid Formic acid

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