Homework Answers
36 . Option ( A) is correct
Reason : on mixing the solute in the solvent there must some energy needed to hreak the bond among the solute particles .to souble in solvent
37. optionb (B) is corret
Reason : in the above given diagram two inter molecular forces , dispersion and diple - diple attraction are mentioned which make the molecules or atoms polar .
![(38) -3 NH3 & ho The tot [ot] = Sexko (0.20 x 108x105 = 1.9x10 m Por = -log Colt] - log (1.9 x 109). log (ngx10h) - od 3.72 Þ](http://img.homeworklib.com/questions/98d2fa60-0876-11eb-9096-237aefa2071a.png?x-oss-process=image/resize,w_560)
39. option (c) is correct
Reason: higher the stability of conjugate base more acidic th substance will be
Greater the number if hydrogens more stronger acid will be e.g. H2SO4 is stronger acid than HCl
In hydra acids like HI and HCl bond porarity is the factor to decide the strength of acid e.g. HI is stronger acid than HCl as HI bond is less polar due to the larger size of I
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36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH change...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH =...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH = change in enthalpy, soln = solution) AH = ΔΗ + ΔΗ + ΔΗ soln 'solute solvent mix A) AH mix will always be an endothermic process B) AHsolute and AHsolvent are sometimes exothermic processes C) Holvent makes no contribution to the overall AH,on D) AHsolute and AHsolvent will always be endothermic processes E) None of the statements are true 39. What are the three...
37. What type of concept associated with dispersion forces is depicted below? Page 6 Electrostatic attraction...
37. What type of concept associated with dispersion forces is depicted below? Page 6 Electrostatic attraction Helium atom 1 Helium atom 2 8 (b) A) Capillary action B) Polarizability C) Molecularity D) Dynamic equilibrium E) Liquid crystal formation 38. What is the pH of a 0.20 M solution of NH3? Kb = 1.8 x 10' for NHz. A) 2.72 B) 11.28 C) 11.98 D) 7.00 39. What are the three structural factors that affect acid strength? A) Amount of oxygen...
34. The phase changes B-C and D - E are not associated with temperature increases because...
34. The phase changes B-C and D - E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds C) rearrange atoms within molecules D) increase the density of the sample gas liquid and gas TOC solid and liquid liquid B solid Heat added (1) 35. Which of these is a weak base? A) NaOH B) HCI E) CH3CH2OH C) Naci D) NH 36. When discussing energy...
33. The following scheme depicts what type of chemical reaction? Page 5 H Η Ο Iran...
33. The following scheme depicts what type of chemical reaction? Page 5 H Η Ο Iran no ranom.don -- [ H-NCH27, N-H + 1 HOCCH27; COH Diamine Adipic acid tN(CH)N-C(CH2),C7,+ 2n H,O Nylon 6,6 A) Addition polymerization C) Condensation polymerization E) Elastomeric polymerization B) Acid-base reaction D) Ionic polymerization 34. The phase changes BC and D E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds...
ormation 38. What is the pH of a 0.20 M solution of NH? K = 18...
ormation 38. What is the pH of a 0.20 M solution of NH? K = 18 x 10 for NH. A) 2.72 B) 11.28 C) 11.98 D) 7.00 39. What are the three structural factors that affect acid strength? A) Amount of oxygen present in the molecule, effect of bond strength: K. B) Stability of the conjugate acid; bond polarity (H-X bond), effect of bond dissociation C) Stability of the conjugate base, amount of hydrogen in the molecule, bond polarity...
Part 2 Multiple Choice. Select the best answer for each of the questions below: 1. Which...
Part 2 Multiple Choice. Select the best answer for each of the questions below: 1. Which of these molecules is not an electrophile? a) CH4 b) CH3+ c) H* d) BF3 2. Which of these molecules is not a nucleophile ? a) NH3 b) OH c) CN d) H* 3. Water behaves as: a) a nucleophile b) an electrophile c) both d) neither 4. The SN2 reaction has how many steps? a) 1 b) 2 c) 3 d) 4 5....
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH = change in enthalpy, soln = solution) AH = ΔΗ + ΔΗ + ΔΗ soln 'solute solvent mix A) AH mix will always be an endothermic process B) AHsolute and AHsolvent are sometimes exothermic processes C) Holvent makes no contribution to the overall AH,on D) AHsolute and AHsolvent will always be endothermic processes E) None of the statements are true 39. What are the three...
37. What type of concept associated with dispersion forces is depicted below? Page 6 Electrostatic attraction Helium atom 1 Helium atom 2 8 (b) A) Capillary action B) Polarizability C) Molecularity D) Dynamic equilibrium E) Liquid crystal formation 38. What is the pH of a 0.20 M solution of NH3? Kb = 1.8 x 10' for NHz. A) 2.72 B) 11.28 C) 11.98 D) 7.00 39. What are the three structural factors that affect acid strength? A) Amount of oxygen...
34. The phase changes B-C and D - E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds C) rearrange atoms within molecules D) increase the density of the sample gas liquid and gas TOC solid and liquid liquid B solid Heat added (1) 35. Which of these is a weak base? A) NaOH B) HCI E) CH3CH2OH C) Naci D) NH 36. When discussing energy...
33. The following scheme depicts what type of chemical reaction? Page 5 H Η Ο Iran no ranom.don -- [ H-NCH27, N-H + 1 HOCCH27; COH Diamine Adipic acid tN(CH)N-C(CH2),C7,+ 2n H,O Nylon 6,6 A) Addition polymerization C) Condensation polymerization E) Elastomeric polymerization B) Acid-base reaction D) Ionic polymerization 34. The phase changes BC and D E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds...
ormation 38. What is the pH of a 0.20 M solution of NH? K = 18 x 10 for NH. A) 2.72 B) 11.28 C) 11.98 D) 7.00 39. What are the three structural factors that affect acid strength? A) Amount of oxygen present in the molecule, effect of bond strength: K. B) Stability of the conjugate acid; bond polarity (H-X bond), effect of bond dissociation C) Stability of the conjugate base, amount of hydrogen in the molecule, bond polarity...
Part 2 Multiple Choice. Select the best answer for each of the questions below: 1. Which of these molecules is not an electrophile? a) CH4 b) CH3+ c) H* d) BF3 2. Which of these molecules is not a nucleophile ? a) NH3 b) OH c) CN d) H* 3. Water behaves as: a) a nucleophile b) an electrophile c) both d) neither 4. The SN2 reaction has how many steps? a) 1 b) 2 c) 3 d) 4 5....
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