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Questions

Explanations

6  Compared to a 1.0-gram sample of chlorine gas at standard pressure, a 1.0-gram sample of solid aluminum at standard pressure has

(1) a lower melting point

(2) a higher boiling point

(3) a lower density

(4) a greater volume

(1) freezing and melting

(2) freezing and vaporization

(3) decomposition and melting

(4) decomposition and combustion

8 In the ground state, an atom of each of the elements in Group 2 has a different

(1) oxidation state

(2) first ionization energy

(3) number of valence electrons

(4) number of electrons in the first shell

9 Which statement explains why water is classified as a compound?

(2) Water is a liquid at room temperature.

(3) Water has a heat of fusion of 334 J/g,

(4) Water is a poor conductor of electricity.

10  Which formula is an empirical formula?

(1) CH₄      (3) C₃H₆

(2) C₂H₆ (4) С₄Н₁₀

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

Question 51-53 Questions 54-56
 Questions 57-61 Questions 62-65 Questions 66-68 Questions 69-72  Questions 73-75  Questions 76-78  Questions 79-82 Questions 83-85