57, Which of the following elements is a lsquid at room temperature? A) chiorine

Question

57, Which of the following elements is a lsquid at room temperature? A) chiorine B) mercury C) helium D) sodium 58. The following diagram represents the reaction of Az (white spheres) with B (grey spheres) What is the balanced chemical equation for this reaction, and what is the limiting reactant? A) A2 + 2B 2AB, A2 is the limiting reactant. B) 4A2 + 6B 6AB, A2 is the limiting reactant. C) A2 + 2B 2AB, B is the limiting reactant. D) 4A2 + 6B 6AB. B is the limiting reactant. 59. Identify the oxidizing agent (oxidant) in the redox reacti Zn(s) + Cu2+(aq) Cu(s) + Zn2+(aq). a. Cu b. Cu2+ c. H20 d. Zn 60. Which is a chemical property of chlorine? (A) It is yellowish green. (B) It burns in sodium vapor (C) It has a density of 3.2 gL-at STP (D) It boils at-34°C.

Explanation / Answer

the colours in 58 are indisguishable and hence I cannot answer it

59 b Cu2+

An oxidising agent is the one which itself gets reduced and oxidises another atom or molecule.

here it is Cu2+ because it accepts electrons from Zn and becomes reduced while oxidising Zn to Zn2+

60) B) it burns in soidum vapour

boiling point, colour and density are physical porperties.

Related Questions

Navigate

• Browse (All)
• Browse 5
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.