Compound A OH OH NH₂ Compound B OH OH H₂N. OH Differentiating Chemical test (1) (3) Positive sign/s of reaction Dissolution and rapid bubbling (effervescence) € Compound that will react (A/B) (2) B
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- 10:31 „0. O O ? 86%i E AIATS For Two Year Medic... A 88 /180 (02:53 hr min Mark for Review HX (C,H,CO),O, The product (A) can be obtained by using HCI HBr HI НЕ Clear Response IIThe equilibrium for the vorious proportions of the dissociation of the liquid solutions of amyl ester of dichloroacetic ccid (CHCI,.COOC,H,} into the acid (CHCLCOOH) and amylene (C,H was investigated. The inltial amount tor the CHCI,COOC.H used Is 1 mole. Completethe table below Let b the inltial moles of omylene, V the totdl volume cof mixtures in iters, x. be the number of moles of V. 1.05 0.215 0.455 3.12 .af equibrium ond Kc ester outionum constont n.moles per iter. 2.61 0.401 4.45 0.628 3.54 0.794 0.658 3.44A saturated Na₂CO₃ solution isprepared, and a small excess of solid ispresent (white pile in beaker). A seedcrystal of Na₂ ¹⁴CO₃(¹⁴C is a radioac-tive isotope of ¹²C) is added (small redpiece), and the radioactivity is mea-sured over time. (a) Would you expectradioactivity in the solution? Explain.(b) Would you expect radioactivity inall the solid or just in the seed crystal? Explain.
- The air in a recently used classroom 9m x 7m x 9m tested 0.12% carbon dioxide. How many cubic meters of fresh air must be admitted per minute in order that 10 minutes later it shall contain not over 0.06% carbon dioxide. Fresh air contains 0.04% carbon dioxide. Assumeimmediate mixing of fresh with stale air. (A) 14 (B) 11 (C) 15 (D) 19 (E) 1710:31 „0. O O ? 86%i E AIATS For Two Year Medic... A 87 /180 (02:53 hr min Mark for Review The correct order of ease of dehydration of the following compounds is CH, (а) CН,-С - Он CH3 CH3 (b) CH, - CH - OH (c) CH3CH2OH a > b >c b>c> a a >c > b c > b > a Clear Response IIIGravimetric assay of sulfuric acid involves step of precipitation by: BaCl2 Са(ОН) AGNO; FeCl3
- (i) (ii) (iii) (iv) 'I OMe HO H g H N Me Br SnMe3 OSiMe3 CHO OH NaNH, NH3 (1) Phl, Pd(PPH3)4 THF, reflux 1. Ph3P=CMe2 2. "Bu4NF 3. H30 + CH₂12, Zn C C₂H₂NO D C₁1H₁1N E C10H16O F C15H26O2Which of the following is the gravimetric factor formula for the following pair of substances? FW stands for formula weight. Choices are attached below. Sought-for Constituent Substance Weighed ZnO Zn2P2O7Hexanoic acid was added to an immiscible biphasic solvent sysem, water and CCl4 at 20.0OC and the equilibrium concentrations of hexanoic acid were determined to be 3.66 g/L in H2O and 67.0 g/L in CCl4. Caluclate the distrubution coeffiecent (D1) of hexanoic acid in CCl4 with respect to water.
- Ans. 17.15 mg. 54) A 1.000-g sample of a mixture which contains only NaCl and KCl gare a precipitate of AgCl which weighed 2.000 g. What are the percentages of Na and K in the mixture? ins 10 g Ans. 44.77% K; 5.75% Na. 1:J 55. I- can be sernarated from othor11. Four biochemical engineers were each given a chlorine-containing hydrocarbon to analyze and react with three different reagents. Their distribution is as follows: [a.] Engr. Consigo was given 52 mL of chloromethylcyclohexane [b.] Engr. Marchadesch acquired 1.0 L of 6.3 M chlorocyclopentane [c.] Engr. Bauzon had 9.12 cubic centimeters of 1-chloro-1-methyl-cyclopentane If they were to react each of there samples with: (1.) Sodium Acetate, (2.) Sodium Methoxide, and (3.) Potassium tert- butoxide, Draw the skeletal structures of the major product for each reaction. In the case that the major product could not be inferred, draw the all of the products in the resulting mixture.underecfectsol