2013 AIMPT - Chemistry


1. The value of Planck's constant is `6.63 × 10^(–34) Js`. The speed of light is `3 × 10^17 nm s^(–1)`. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of `6 × 10^15 s^(–1`?




2. What is the maximum numbers of electrons that can be associated with the following set of quantum numbers?n = 3, l = 1 and m = –1




3. What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20°C to 35°C? (`R = 8.314 J mol^(–1) K^(–1)`)




4. A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of electrode would be




5. A reaction having equal energies of activation for forward and reverse reactions has




6. At 25°C molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is `9.54 ohm^(–1) cm^2 mol^(–1)` and at infinite dilution its molar conductance is `238 ohm^(–1) cm^2 mol^(–1)`. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is




7. Based on equation `E = –2.178 × 10^(–18) J (Z^2/n^2)` certain conclusions are written. Which of them is not correct?




8. A button cell used in watches functions as following






9. How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M `HNO_3`? The concentrated acid is 70% `HNO_3`.




10. The number of carbon atoms per unit cell of diamond unit cell is




11. Maximum deviation from ideal gas is expected from




12. A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is `2.72 g cm^(–3`. The molar mass of the metal is (N_A Avogadro's constant = `6.02 xx 10^23 mol^(-1`)




13. Dipole-induced dipole interactions are present in which of the following pairs?




14. A magnetic moment of 1.73 BM will be shown by one among the following




15. Roasting of sulphides gives the gas X as a byproduct. This is a colorless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic acts as a reducing agent and its acid has never been isolated. The gas X is




16. Which is the strongest acid in the following?




17. Which of the following is paramagnetic?




18. Which of the following structure is similar to graphite?




19. The basic structural unit of silicates is




20. Reaction by which Benzaldehyde cannot be prepared?






21. Which of the following does not give oxygen on heating?




22. Which of the following lanthanoid ions is diamagnetic?(At.no.Ce=58, Sm = 62, Eu = 63, Yb = 70)




23. Identify the correct order of solubility in aqueous medium




24. `XeF_2` is isostructural with




25. An excess of `AgNO_3` is added to 100 mL of a 0.01 M solution of dichlorotetraaquachromium(III) chloride. The number of moles of `AgCl` precipitated would be




26. Which of these is least likely to act as a Lewis base?




27. `KMnO_4` can be prepared from `K_2MnO_4` as per the reaction:`3MnO_4^(2-) + 2H_2O rarr 2MnO_4^(-) + MnO_2 + 4OH^-`The reaction can go completion by removing OH- ions by adding




28. Which of the following is electron-deficient?




29.


Structure of the compound whose IUPAC name is 3- Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is (refer image for options)




30. Which of these is not a monomer for a high molecular mass silicone polymer?




31. Which of the following statements about the interstitial compounds is incorrect?




32. Which one of the following molecules contains no `pi` bond?




33. Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following statements is not true




34.


Among the following ethers, which one will produce methyl alcohol on treatment with hot concentrated HI? (refer image for options)




35. Nylon is an example of




36.


The structure of isobutyl group in an organic compound is (refer image for options)




37. Nitrobenzene on reaction with conc. `HNO_3`/`H_2SO_4` at 80-100°C forms which one of the following products?




38. Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating?




39. `6.02 xx 10^20` molecules of urea are present in 100 mL of its solution. The concentration of solution is




40. Which of the following is a polar molecule?




41.


Which is the monomer of Neoprene in the following?




42. In the reaction, A is






43. The radical (refer image) is aromatic because it has






44. The order of stability of the following tautomeric compounds is






45. Which of the following compounds will not undergo Friedal-Craft's reaction easily?




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