Identify the precipitate(s) formed when solutions of NH_4CI(aq), AgCIO_3(aq), an
ID: 997879 • Letter: I
Question
Identify the precipitate(s) formed when solutions of NH_4CI(aq), AgCIO_3(aq), and NaCI(aq) are mixed. A) AgCI B) AgCI and NH_4CIO_3 C) NH_4CI and NaCIO_3 D) NH_4CIO_3 E) AgNH_4 74. Based on the solubility rules, which of the following compounds should be insoluble in water? A) Na_2SO_4 B) BaSO_4 C) CuSO_4 D) MgSO_4 E) Rb_2SO_4 75. Which is the correct Lewis structure ot PF_5 A. B. C. D. 76. The Lewis structure for A. B. C. D. E. 77. A resonance structure is one of two or more Lewis structures for a single molecule that cannot be represented accurately by only one Lewis structure. A. True B. FalseExplanation / Answer
Answer 73: A.
Out of all options AgCl is only precipitate. Other are soluble in water.
Answer 74: B) BaSO4
Na2SO4, Rb2SO4, CuSO4 are soluble in water. Solubility of alkaline earth metal sulphates decreases from Mg to Ba.
Answer 75: D
Valence electronic configuration of ‘P’ is: 3s2 3p33d0
During the bonding with F , one of the electron jump in to 3d orbital so that phosphorus will have electronic configuration: 3s1 3p33d1. Thus phosphorus have 5 single electrons to share with 5 flourine atoms. Thus the structure of PF5 is shown by option D.
Answer 76: D.
Carbon valency is 4 and oxygen valence is 2.
Answer 77: False.
The question is telling that for a particular molecule we cant exactly show one Lewis structure and that molecule may be described by two or more structures. All the structure to describe that molecule are known as ‘resonance’ structures. This statement is false.