6 Oil does not dissolve in water because A oil is polar B oi

6. Oil does not dissolve in water because A) oil is polar B) oil is nonpolar C) water is nonpolar D) water is saturated E) oil is hydrated 7. When KCl dissolves in water- , A) the a-ions are attracted to dissolved K+ ions C) the K+ ions are attracted to a-ions on the KCI crystal D) the K E) the K the a- ions are attracted to the partial negative charge on the oxygen atom of the water molecule ions are attracted to the partial negative charge on the oxygen atom of the water molecule ions are attracted to the partial positive charge on the hydrogen atoms of the water molecule a polar solvent and bexane (CsHid is a nonpolar solvent. Which of the following correctly describes the solubility of the solute in the given solvent? A) mineral oil, soluble in water B) CaCl2, soluble in hexane C) NaHCO3, soluble in water D) CC4, soluble in water E) octane, soluble in water 9. In water, a substance that ionizes completely in solution is called a A) weak electrolyte B) nonelectrolyte C) semiconductor D) nonconductor E) strong electrolyte 10. When some of the sugar added to iced tea remains undissolved at the bottom of the glass, the solution is A) dilute B) polar C) nonpolar D) saturated E) unsaturated 11. The solubility of KI is 50 g in 100 g of H20 at 20 °C. If 110 grams of A) all of the KI will dissolve B) the solution will freeze C) the solution will start boiling D) a saturated solution will form E) the solution will be unsaturated

Solution

Ans 6B: Like dissolves like and water is polar. So oil doesn\'t dissolve in water, it being a non-polar compound.

Ans 7B: When KCl dissolves in water the K+ ions are attracted to the partial negative charge on the oxygen molecule.

Ans 8C: NaHCO3 is soluble in water.

Ans 9E: When a compound ionises completely, it is called as a strong electrolyte.

Ans 10D: No more solute can dissolve in the solvent at the given temperature, hence the solution is saturated.

Ans 11D: Since only 100g of KI can dissolve, the 10g remains undissolved and hence a saturated solution shall be formed.