Chemistry sample Paper for IIT-JEE


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Chemistry sample Paper for IIT Entrance

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Chemistry sample Paper for IIT-JEE

  1. 1. CHEMISTRY 1. CBACH OH HCCH O CHCHMgPBr      223 3 | 3 DOH   2 Here, D is (a) 32 3 | 3 CHCHO CH HCCH  (b) 32 3 | 3 CHCH CH HCOCH  (c) OHCHCH CH HCCH 22 3 | 3  (d) OHCH CH HCCHCH 2 3 | 23  2. Phenol is more acidic than (a) (b) (c) 22 HC (d) Both (a) and (c) 3. In the reaction, )()( 3 2356 AOCOCHCHOHC COONaCH   product (A) is (a) Acetaldehyde (b) Cinnamic acid (c) -nephthol (d) Phenol 4. The correct order of ease of dehydration of following is (a) I > II > III (b) III > II > I (c) I > III > II (d) III > I > II 5. 5PCl reacts with a compound containing (a) 3SO group (b) – OH group (c) 3NO group (d) – NO group 6. Cumene process is the most important commercial method for the manufacture of phenol. Cumene is (a) 1-methyl ethyl benzene (b) Ethyl benzene (c) Vinyl benzene (d) Propyl benzene 7. The compound X in the reaction is (a) (b) (c) (d) 8. Reaction OHCH OH OHCH OH OCH OH 2 2 or baseacid 2  is called (a) Lederer Manasse reaction (b) Claisen condensation (c) Benzoin condensation (d) Etard reaction  Space for rough work OH OCH 3 NO2 OH I OH II OH III OH O Na O H COO H + CO2   K390 X  HCl COON a ON a COON a ON a COO H OCOO Na
  2. 2. 9. When phenol is reacted with 3CHCl and NaOH followed by acidification, salicyldehyde is obtained. Which of the following species are involved in the above mentioned reaction as inter mediate (a) (b) (c) (d) All of these 10. The order of solubility of alkanols in water is (a) Propanol < Butanol > Pentanol (b) Propanol > Butanol > Pentanol (c) Propanol > Butanol < Pentanol (d) Propanol = Butanol = Pentanol 11. Benzophenone can be converted into benzene using (a) Fused alkali (b) Anhydrous 3AlCl (c) Sodium amalgam in water (d) Acidified dichromate 12. The reagent(s) which can be used to distinguish acetophenone from benzophenone is (are) (a) 2, 4-dinitrophenyl hydrazine (b) Aqueous solution of 3NaHSO (c) Benedict reagent (d) 2I and 32CONa 13. When acetaldehyde is heated with Fehling solution, it gives a red precipitate of (a) Cu (b) CuO (c) OCu2 (d) 2)(OHCu 14. The general order of reactivity of carbonyl compounds for nucleophilic addition reactions is (a) OCArOCRArCHORCHOOCH  222 (b) OCHOCRRCHOOCArArCHO  222 (c) OCHRCHOArCHOOCROCAr  222 (d) ArCHORCHOOCArOCROCH  222 15. Which of the following gives an alcohol and salt of carboxylic acid when reacted with conc. NaOH (a) CHOCH 3 (b) CHOHC 56 (c) 33 COCHCH (d) 356 COCHHC 16. Which of the following compounds would undergo Cannizzaro's reaction (a) Propionaldehyde (b) Benzaldehyde (c) Bromobenzene (d) Acetaldehyde 17.  HNaOH / reacts with (a) 356 OCHHC (b) OHCH 3 (c) 3 || 3 CH O CCH  (d) OHHC 52 18. The product of following reaction is /2   PtH O (a) (b) (c) (d)  Space for rough work O 3CCl H O 2CHCl OH CHCl | O H CH 3 OH O H 3CH H OH
  3. 3. 19. Which of the following aldehydes is most reactive towards nucleophilic addition reactions (a) HCHO (b) CHOCH3 (c) CHOHC 52 (d) 33COCHCH 20. Which one of the following gives iodoform test (a) Formaldehyde (b) Ethyl alcohol (c) Benzyl alcohol (d) Benzaldehyde 21. If the difference in electronegativities of two elements is very large, then (a) The bond is 50% ionic (b) The bond is 100% covalent (c) The bond is more covalent than ionic (d) The bond is more ionic than covalent 22. Which of the following elements will have the lowest electron affinity (a) Nitrogen (b) Flourine (c) Chlorine (d) Phosphorus 23. The correct order of second ionization potential of carbon, nitrogen, oxygen and fluorine is (a) C > N > O > F (b) O > N > F > C (c) O > F > N > C (d) F > O > N > C 24. Which of the following species has the highest ionisation potential (a)  Li (b)  Mg (c)  Al (d) Ne 25. Which of the following elements are analogous to the lanthanides (a) Actinides (b) Borides (c) Carbides (d) Hydrides 26. 2SO acts as temporary bleaching agent but 2Cl acts as permanent bleaching agent. Why (a) 2Cl bleaches due to reduction but 2SO due to oxidation (b) 2Cl bleaches due to reduction but 2SO due to reduction (c) Both of these (d) None of these 57. When orthophosphoric acid is heated to ,600 Co the product formed is (a) Phosphine, 3PH (b) Phosphorus pentoxide, 52OP (c) Phosphorus acid, 33 POH (d) Metaphosphoric acid, 3HPO 58. When ammonia is passed over heated CuO , it is oxidised to (a) 2N (b) 2NO (c) ON 2 (d) 2HNO 59. When chlorine water is exposed to sunlight the colour change that occurs is (a) Colourless to brown (b) Greenish yellow to colourless (c) Light blue to colourless (d) Colourless to greenish yellow 60. 2N forms 3NCl , whereas P can form both 5PCl and 5PCl . Why (a) P has low lying 3d orbitals, which can be used for bonding but 2N does not have low lying 3d orbital (b) 2N atom is larger than P in size (c) P is more reactive towards Cl than 2N (d) None of these  Space for rough work