2015 AIMPT - Chemistry


1. Maximum bond angle at nitrogen is present in which of the following




2. Which of the following species contains equal number of `sigma` and `pi` - bonds?




3. Bithional is generally added to the soaps as an additive to function as a/an




4. The total number of π- bond electrons in the following structure is




5. Magnetic moment 2.84 B.M. is given by:
(At. nos. Ni = 28, Ti = 22, Cr = 24, Co = 27)




6. A mixture of gases contains `H_2` and `O_2` gases in the ratio of 1:4 (w/w). What is the molar ratio of the two gases in the mixture?




7. The number of d-electrons in `Fe^(2+)` (Z = 26) is not equal to the number of electrons in which one of the following?




8. Which of the following processes does not involve oxidation of iron?




9. Cobalt (III) Chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at `25^o`C?




10. In the given figure, The enthalpy of hydrogenation of these compounds will be in the order as






11. ‘’Metals are usually not found as nitrates in their ores’’. Out of the following two (a and b) reasons which is/are true for the above observation?
(a) Metal nitrates are highly unstable
(b) Metal nitrates are highly soluble in water




12. The boiling point of `0.2 mol kg^(−1)` solution of X in water is greater than equimolal solution of Y in water. Which one of the following statements is true in this case?




13. Solubility of the alkaline earth’s metal sulphates in water decreases in the sequence




14. A given metal crystallizes out with a cubic structure having edge length of 361 pm. If there are four metal atoms in one unit cell, what is the radius of one atom?




15. Which of the following statements is correct for a reversible process in a state of equilibrium?




16. In Duma’s method for estimation of nitrogen 0.25 g of an organic compound gave 40 mL if nitrogen collected at 300 K temperature and 725 mm pressure. If the aqueous tension at 300 K is 25 mm, the percentage of nitrogen in the compound is




17. Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is shown by one of these compounds, but not by the other?




18. Which property of colloidal solution is independent of charge on the colloidal particles?




19. The angular momentum of electron in ‘d’ orbital is equal to




20. Consider the following compounds. Hyperconjugation occurs in




21. The species `Ar`, `K^+` and `Ca^(2+)` contain the same number of electrons. In which order do their radii increase?






22. An organic compound ‘X’ having molecular formula `C_5H_10O` yields phenyl hydrazone and gives negative response to the lodoform test and Tollens’ test. It produces npentane on reduction. ‘X’ could be




23. The reaction of `C_6H_5CH = CHCH_3` with HBr produces






24. Which of the given compounds can exhibit tautomerism in the given figure?




25. In which of the following compounds, the C–Cl bond ionization shall give most stable carbonium ion?






26. If the value of an equilibrium constant for a particular reaction is `1.6 xx 10^12`, then at equilibrium the system will contain




27. Which one is not equal to zero for an ideal solution?




28. The enolic form of ethyl acetoacetate as below has






29. A single compound of the structure (refer fig) is obtainable from ozonolysis of which of the following cyclic compounds






30. The function of ‘’Sodium pump’’ is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a constituent of this pump?




31. The `K_(sp)` of `Ag_2CrO_4`, `AgCl`, `AgBr` and `AgI` are, respectively, `1.1 × 10^(−12)`, `1.8 × 10^(−10)`, `5.0 × 10^(−13)`, `8.3 × 10^(−17)`. Which one of the following salts will precipitate last if `AgNO_3` solution is added to the solution containing equal moles of `NaCl`, `NaBr`, `NaI` and `Na_2CrO_4`




32. The activation energy of a reaction can be determined from the slope of which of the following graphs?




33. Which of the following options represents the correct bond order?






34. Which of the following pairs of ions are isoelectronic and isostructural?




35. Because of lanthanoid contraction, which of the following pairs of elements have nearly same atomic radii? (Numbers in the parenthesis are atomic numbers).




36. Which of the following is the most correct electron displacement of a nucleophilic reaction to take place






37. Treatment of cyclopentanone with methyl lithium gives which of the following species?






38. Biodegradable polymer which can be produced from glycine and aminocaproic acid is




39. Which one of the following electrolytes has the same value of van’t Hoff’s factor (i) as that of `Al_2(SO_4)_3` (if all are 100% ionized)?




40. The correct bond order in the following species is






41. A device that converts energy of combustion of fuels like hydrogen and methane, directly into electrical energy is known as




42. The electrolytic reduction of nitrobenzene in strongly acidic medium produces




43. When initial concentration of a reactant is doubled in a reaction, its half – life period is not affected. The order of the reaction is




44. The reaction






45. Which of these statements about `[Co(CN)_6]^(3−)` is true?




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