Entrance Test Engineering / Medical- Chemistry paper6

1. Which one is anhydride of HClO4 a)Cl2O b)ClO2 c)Cl2O6 d)Cl2O72. Which of the following Hydrides has the lowest boiling point? a)H2O b)H2S c)H2Se d)H2Te3. What is the oxidation number of Sulphur in Na2S4O6 a)2/3 b)3/2 c)3/5 d)5/24. Which of the following does not react with AgCl? a)Na2S2O3 b)NH4OH c)NaNO3 d)Na2CO35. Which is an oxidising substance amongst the following a)CO2 b)NO2 c)SO2 d)SO36. Oleum is a)Castor oil b)Oil of Vitriol c)Fuming H2SO4 d)None of them7. When conc. H2SO4comes in contact with sugar, it becomes black due to a)hydrolysis b)hydration c)decolourisation d)dehydration8. The number σ bonds in P4O10is a)6 b)16 c)20 d)79. Which oxide of Nitrogen is obtained on heating Ammonium Nitrate at 2500C a)Nitric Oxide b)Nitrous Oxide c)Nitrogen Dioxide d)Dinitrogen Tetraoxide10. In P4O6,the number of oxygen atoms bonded to each P atom is a)1.5 b)2 c)3 d)411. Which one of the following compounds does not exist? a)NCl5 b)AsF5 c)SbCl5 d)PF512. Phosphine is prepared by the action of a)PandH2SO4 b)PandNaOH c)PandH2S d)PandHNO313. Which of the following is a tetrabasic acid? a)Orthophosphoric acid b)Hypophosphorous acid c)Metaphosphoric acid d)Pyrophosphoric acid14. Carborundum is a)Al2(SO4)3 b)Al2O3.2H2O c)AlCl3 d)SiC15. White Lead is a)basic lead acetate b)acidic lead carbonate c)basic lead carbonate d)basic lead hydroxide16. The Halide which is not hydrolysed is a)SiCl4 b)SiF4 c)CCl4 d)PbCl417. The type of hybridisation of boron in diborane is a)sp b)sp2 c)sp3 d)sp3d218. Carbon Monoxide reacts with Chlorine in the presence of sunlight to give a)Phosgene b)COCl c)Phosphine d)CCl419. Which one of the following is used in the industrial preparation of nitric acid by Ostwald's process? a)N2 b)NH4NO3 c)N2O5 d)NH320. Which of the following type of forces bind together the carbon atoms in diamond a)ionic b)covalent c)dipolar d)van der Waals21. Which one of the following is strongest Lewis acid? a)BF3 b)BCl3 c)BBr3 d)BI322. Boron compounds behave as Lewis acid because of their a)acidic nature b)covalent nature c)electron deficient character d)ionisation property23. The chemical used for cooling in refrigeration is a)CO2 b)NH4OH c)NH4Cl d)Liquid NH324. On heating quick lime with coke in an electric furnace, we get a)CaandCO2 b)CaCO3 c)CaO d)CaC225. What is X in the following reaction? MgCl2+H2O→X+2HCl a)MgO b)Mg c)Mg(OH)2 d)Mg(OH)Cl26. Which of the following decomposes on heating? a)MgCO3 b)Na2CO3 c)K2CO3 d)All27. Epsom Salt is a)MgSO4.7H2O b)Mg(OH)2 c)2CaSO4.H2O d)BaSO428. Chemical A is used for water softening to remove temporary hardness. A reacts with Sodium Carbonite to give Caustic Soda. When CO2is bubbled through A, it turns cloudy. What is A? a)CaCO3 b)CaO c)Ca(OH)2 d)Ca(HCO3)229. Nitrolim is a)CaCN2+C b)Ca(CN)2+C c)CaC2+C d)All30. Setting of cement is an a)Exothermic reaction b)Endothermic reaction c)Neither exothermic nor endothermic d)None31. Sodium metal reacts with Al2O3at high temperature to give a sodium compound X. X reacts with CO2in water to form Y. Y is a)Na2O2 b)Na2O c)Na2CO3 d)NaAlO232. When NaOH is made, the gas released at Cathode is a)Cl2 b)H2 c)O2 d)H2O33. Main process for the manufacture of sodium carbonate is a)Castner process b)Solvay process c)Down process d)Nelson process34. Which is the weakest reducing agent? a)Li b)Na c)K d)Rb35. The alkali metal that reacts with nitrogen directly to form nitride is a)Li b)Na c)K d)Rb36. A solution of sodium metal in liquid ammonia is strongly reducing due to the presence of a)sodium atoms b)sodium hydride c)sodium amide d)solvated electrons37. Which halide has the highest melting point? a)NaCl b)NaBr c)NaF d)NaI38. Which of the following alkali metal hydroxides is the strongest base a)LiOH b)NaOH c)KOH d)CsOH39. Alkali metals impart colour to Bunsen flame due to a)low ionisation energies b)low melting points c)their softness d)the presence of one electron in the outer most shell40. Fire extinguishers contain H2SO4and a)NaHCO3and Na2CO3 b)NaHCO3 c)Na2CO3 d)CaCO341. 1ml of H2O2solution gives 10 ml of O2 at NTP. It is a)10vol.H2O2 b)20vol.H2O2 c)30vol.H2O2 d)40vol.H2O242. In Bosch's process which gas is utilised for the production of hydrogen gas? a)producer gas b)water gas c)coal gas d)none43. Pure water can be obtained from sea water by a)centrifugation b)plasmolysis c)reverse osmosis d)sedimentation44. The percentage by weight of hydrogen in H2O2is a)5.88 b)6.25 c)25 d)5045. The absorption of hydrogen by palladium is called a)hydration b)reduction c)occlusion d)hydrogenation46. The structure of H2O2is a)Planar b)non planar c)spherical d)linear47. D2Ois used more in a)chemical industry b)nuclear reactor c)pharmaceutical preparation d)insecticide preparation48. Which of the following evolve Hydrogen on reacting with cold dilute nitric acid? a)Mg b)Al c)Fe d)Cu49. Water is said to be permenantly hard when it contains a)sulphates of Mg and Ca b)Bicarbonates of Mg and Ca c)sulphates of Cu and Hg d)Carbonates and Bicarbonates of Mg and Cu50. Which of the following on oxidation gives H2O2? a)2-ethyleanthraquinol b)2-ethyleanthraquinone c)anthracene d)2-ethyleanthracene