Your SlideShare is downloading. ×
AIPMTChemistry 1994
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×

Introducing the official SlideShare app

Stunning, full-screen experience for iPhone and Android

Text the download link to your phone

Standard text messaging rates apply

AIPMTChemistry 1994

370
views

Published on

Published in: Education, Business, Technology

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
370
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide
  • aaa
  • Transcript

    • 1. aipmt–Past papers
      CHEMISTRY- UNSOLVED PAPER - 1994
    • 2. SECTION – I (Total Marks : 50)
      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
    • 3. 01
      Problem
      Which one of the following statements is not true?
      Ampicillin is a natural antibiotic
      Aspirin is both analgesic and antipyretic
      Sulphadiazine is a synthetic antibacterial drug
      Some disinfectants can be used as antiseptics.
    • 4. Problem
      02
      Which one of the following order is wrong, with respect to the property indicated?
      Benzoic acid > phenol > cyclohexanol (acid strength )
      Aniline > cyclohexylamine > benzamide (basic strength )
      Formic acid > acetic acid > propanoic acid (acid strength )
      Fluroacetic acid > chloroacetic acid > bromoacetic acid (acid strength ).
    • 5. Problem
      03
      Compound A has a molecular formula C2Cl3OH. It reduces Fehling’s solution and on oxidation, it gives a monocarboxylic acid B. If A is obtained by the action of chlorine on ethyl alcohol, then compound A is
      Methyl chloride
      Monochloro acetic acid
      Chloral
      Chloroform.
    • 6. Problem
      04
      An acyl halide is formed when PCl5 reacts with an
      Amide
      Ester
      Acid
      Alcohol.
    • 7. Problem
      05
      Which of the following compound will undergo self aldol condensation in the presence of cold dilute alkali? 
      CH C – CHO
      CH2 = CH – CHO
      C6H6CHO
      CH3CH2CHO.
    • 8. Problem
      06
      Diazo – coupling is useful to prepare some
      Dyes
      Vitamins
      Pesticides
      Proteins.
    • 9. Problem
      07
      On heating glycerol with conc. H2SO4, a compound is obtained which has bad odour. The compound is  
      Acrolein
      Formic acid
      Allyl alcohol
      Glycerol sulphate.
    • 10. Problem
      08
      The most suitable method of the separation of a 1 : 1 mixture of ortho-and para-nitrophenols is  
      Crystallization
      Chromatography
      Distillation
      Sublimation.
    • 11. Problem
      09
      Which of the following compounds will give positive test with Tollen’s reagent? 
      Acetic acid
      Acetone
      Acetamide
      Acetaldehyde.
    • 12. Problem
      10
      By the action of enzymes, the rate of biochemical reaction
      Does not change
      Increases
      Decreases
      Either (a) or (c).
    • 13. Problem
      11
      Reaction of t-butyl bromide with sodium methoxide produces
      Sodium t-butoxide
      t-butyl methyl ether
      isobutene
      Isobutylene.
    • 14. Problem
      12
      The reactive species in the nitration of benzene is
      NO3
      NHO3
      NO
      NO
    • 15. Problem
      13
      Grignard reagent is prepared by the reaction between 
      Magnesium and alkane
      Magnesium and aromatic hydrocarbon
      Zinc and alkyl halide
      Magnesium and alkyl halide.
    • 16. Problem
      14
      Which of the following statement concerning lanthanides elements is false? 
      All lanthanides are highly dense metals
      More characteristic oxidation state of lanthanides elements is +3
      Lanthanides are separated from one another by ion exchange method
      ionic radii of trivalent lanthanides steadily increases with increase in the atomic number.
    • 17. Problem
      15
      The action of nitrous acid on an aliphatic primary amine, gives
       
      Secondary amine
      Nitro alkane
      Alcohol
      Alkyl nitrite.
    • 18. Problem
      16
      One of the following which does not observe the anti-Markownikoff’s addition of HBr, is  
      Pent-2-ene
      Propene
      But-2-ene
      But-1-ene.
    • 19. Problem
      17
      The compound which does not react with sodium, is
      CH3COOH
      CH3-CHOH-CH3
      C2H5OH
      CH3-O-CH3.
    • 20. Problem
      18
      Which of the following ligands is expected to bidentate? 
      CH3NH2
      CH3C N
      Br
      C2O
    • 21. Problem
      19
      Method used for obtaining highly pure silicon, used as a semiconductor material, is  
      Crystallization
      Zone refining
      Oxidation
      Electro-chemical.
    • 22. Problem
      20
      Which one of the following statements is not correct?
      Mercury (II) iodide dissolves in excess of potassium iodide solution
      Tin (IV) chloride is made by dissolving tin solution in concentrated hydrochloric acid
      Zinc dissolves in sodium hydroxides solution
      Carbon monoxide reduces iron (III) oxide to iron.
    • 23. Problem
      21
      Carbon and silicon belong to (IV) group. The maximum coordination number of carbon in commonly occurring compounds is 4, whereas that of silicon is 6, This is due to  
      Availability of low lying Assertion (A) :- orbitals in silicon
      Large size of silicon
      More electropositive nature of silicon
      Both (b) and (c).
    • 24. Problem
      22
      Which of the following transition element shows the highest oxidation state?
      V
      Cr
      Mn
      Fe.
    • 25. Problem
      23
      Which of the following oxides of nitrogen is paramagnetic ? 
      NO2
      N2O3
      N2O
      N2O5.
    • 26. Problem
      24
      To protect iron against corrosion, the most durable metal plating on it, is
      Copper plating
      Zinc plating
      Nickel plating
      Tin plating.
    • 27. Problem
      25
      Which of the following statements about H3BO3 is not correct ?
      It has a layer structure in which planar BO3 units are joined by hydrogen bonds
      It does not act as proton donor but acts as a Lewis acid by accepting hydroxyl ion
      It is a strong tribasic acid
      It is prepared by acidifying an aqueous solution of borax.
    • 28. Problem
      26
      Which of the following displaces Br2 from an aqueous solution containing bromide ions?
      I2
      I
      Cl2
      Cl-.
    • 29. Problem
      27
      Ionic solids, with Scotty defects, contain in their structure
      Cation vacancies only
      Cation vacancies and interstitial cations
      Equal number of cation and anion vacancies
      Anion vacancies and interstitial anions.
    • 30. Problem
      28
      Which pair of substances gives same gaseous product, when these react with water?
      K and KO2
      Ba and BaO2
      Ca and CaH2
      Na and Na2O2.
    • 31. Problem
      29
      Which of the following salt has the same value of vant’s Hoff factor I as that of K3[Fe(CN)6]?
      Na2SO4
      Al(NO3)3
      Al2(SO4)3
      NaCl
    • 32. Problem
      30
      Standard reduction potentials at 250C of Li+|Li,Ba2+|Ba, Na+|Na and Mg2+|Mg are – 3.05, -2.90,-2.71 and –2.37 volt respectively. Which one of the following is the strongest oxidizing agent? 
      Ba2+
      Mg2+
      Na+
      Li+.
    • 33. Problem
      31
      The data for the reaction A + B -> C, is
      Exp. [A]0 [B]0 Initial rate
      1 0.012 0.035 0.10
      2 0.024 0.070 0.80
      3 0.024 0.035 0.10
      4 0.012 0.070 0.80
      the rate law corresponds to the above data is  
      rate = k[A][B]3
      rate = k [A]2[B]2
      rate = k[B]3
      rate = k[B]4
    • 34. Problem
      32
      Which one of the following is not is electronic with O2-?
      TT+
      Na+
      N3-
      F-.
    • 35. Problem
      33
      For the adsorption of a gas on a solid, the plot of log (x/m) versus log P is linear with slope equal to
      n
      1/n
      k
      log k.
    • 36. Problem
      34
      Which of the following molecules has the highest bond order?
      O2-
      O2
      O2+
      O22-
    • 37. Problem
      35
      Following reaction occurring in an automobile The sign of H, S and G would be
      -. +, +
      + , + , -
      +, - , +
      -, +, -.
    • 38. Problem
      36
      At 250C, the highest osmotic pressure is exhibited by 0.1 M solution of
      Glucose
      Urea
      CaCl2
      KCl.
    • 39. Problem
      37
      How many grams of CH3OH should be added to water to prepare 150 ml solution of 2 M CH3OH ? 
      9.6 X 103
      2.4 X 103
      9.6
      2.4.
    • 40. Problem
      38
      Which substance is serving as a reducing agent in the following reaction ? 
      H+
      H2O
      Ni.
      Cr2O2-7
    • 41. Problem
      39
      Which of the following molecule does not possess a permanent dipole moment?
      CS2
      SO3
      H2S
      SO2.
    • 42. Problem
      40
      50 ml of hydrogen diffuses out through a small hole of a vessel, in 20 minutes. The time taken by 40 ml of oxygen to diffuse out is
      32 minutes
      64 minutes
      8 minutes
      12 minutes.
    • 43. Problem
      41
      The formula for calcium chlorite is
      CaClO2
      Ca(ClO2)2
      Ca(ClO4)2
      Ca(ClO3)2.
    • 44. Problem
      42
      In a radioactive decay, an emitted electron comes from 
      Outermost orbit of the atom
      Orbit having principal quantum number one
      Nucleus of the atom
      Inner orbital of the atom.
    • 45. Problem
      43
      The number of atoms is 100 g of an FCC crystal with density Assertion (A) : = 10 g/cm3 and cell edge equal to 100 pm, is equal to
      2 x 1025
      1 x 1025
      4 x 1025
      3 x 1025.
    • 46. Problem
      44
      Which one of the following is most soluble?
      Bi2S3 (Ksp = 1 x 10-70)
      Ag2S (Ksp = 6 x 10-51)
      Cus (Ksp = 8 x 10-37)
      MnS(Ksp = 7 x 10-16)
    • 47. Problem
      45
      The temperature of a gas is raised from 270C to 9270C. The root mean square speed of the gas  
      Remains same
      Gets times
      Gets halved
      Gets doubled.
    • 48. Problem
      46
      For which of the following sets of four quantum numbers, an electron will have the highest energy ? 
      n l m s
      3 2 1 +1/2
      4 2 -1 +1/2
      4 1 0 -1/2
      5 0 0 -1/2.
    • 49. Problem
      47
      The oxidation state of 1 in H4IO6- is
      + 1
      -1
      + 7
      + 5.
    • 50. Problem
      48
      The table shown below gives the bond dissociation energies (Ediss) for single covalent bonds of carbon (C) atoms with element A, B, C and D. which element has the smallest atoms?  
      C
      D.
      A
      B
    • 51. Problem
      49
      At 800C, distilled water has [H3O+] concentration equal to 1 x 10-6 mole/litre. The value of Kwat this temperature will be  
      1 x 10-12
      1 x 10-15
      1 x 10-6
      1 x 10-9
    • 52. Problem
      50
      The total number of valence electrons in 4.2 gm of N ion is ( is the Avogadro’s number ) 
      2.1
      4.2
      1.6
      3.2
    • 53. For solution visit www.vasista.net