August 2016  Chemistry Regents #36-40

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36 What occurs when potassium reacts with chlorine to form potassium chloride?

(1) Electrons are shared and the bonding is ionic.

(2) Electrons are shared and the bonding is covalent.

(3) Electrons are transferred and the bonding is ionic.

(4) Electrons are transferred and the bonding is covalent.

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37 Given the balanced equation representing a reaction:

 

What occurs as bonds are broken in one mole of H2 molecules during this reaction?

(1) Energy is absorbed and one mole of unbonded hydrogen atoms is produced.

(2) Energy is absorbed and two moles of unbonded hydrogen atoms are produced.

(3) Energy is released and one mole of unbonded hydrogen atoms is produced.

(4) Energy is released and two moles of unbonded hydrogen atoms are produced.

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38 Which pair of atoms has the most polar bond?

(1) H−Br     (3) I−Br

(2) H−Cl      (4) I−Cl

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39 Which two notations represent isotopes of the same element?

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40 The graph below shows the volume and the mass of four different substances at STP. Which of the four substances has the lowest density?

(1) A (3) C

(2) B (4) D

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Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-54 Questions 55-57 Questions 58-59 Questions 60-61 Questions 62-65 Questions 66-68 Questions 69-72 Questions 73-74  Questions 75-76  Questions 77-78  Questions 79-80  Questions 81-82  Questions 83-85

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