8. Which one of the following is a property of most metals? A) low melting point

Question

8. Which one of the following is a property of most metals? A) low melting point B) brittleness C) high electronegativity D) thermal conductivity E) acidic oxides D) moles solute/kg solvent E) none (dimensionless) 9, in a saturated solution of a salt in water, A) the rate of crystallization the rate of dissolution B) the rate of dissolution > the rate of crystallization C) seed crystal addition may cause massive crystallization D) the rate of crystallization the rate of dissolution E) addition of more water causes massive crystallization 10. Which one of the following substances would be the most soluble in CCl4? A) CH3CH20H B) H20 C) NH3 D) NaC E) C10+22 11. Which of the following choices has the compounds correctly arranged in order of increasing solubility in water? (least soluble to most soluble) A) CCl4 CHCl3 NaNO3 B) CH3OHCH4LiF C) CH4 NaNO3 CHC3 D) LiF

Explanation / Answer

8. Option D, thermal conductivity

9. Option A, crystallization is faster than the dissolution

10. Option E, since CCl4 is non polar and C10H22( alkane) is also non polar. A/ to like dissolves in like.

11. Option A, since NaNO3 is ionic more soluble in water, Chcl3 is covalent and forms Hydrogen bonds with water while ccl4 is non polar hence least soluble.

12. Option B

13. Option D

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