solutions

Which explains why oil does not mix with water?

• difference in amount

• difference in polarity

• difference in temperature

• same polarity

Which mixture below has a uniform composition throughout?

• cola

• ice cream

• jam

• any of the three

A solution is prepared by mixing 30 grams of table salt, (Sodium chloride) and 120 grams of water. What is the concentration of table salt in % by mass?

• 20%

• 5%

• 15%

• 10%

A 10-karat gold is an alloy. It is composed of 41.7% gold and 58.3% alloy. What is gold in this mixture?

• solvent

• heterogeneous

• solute

• compound

The atmosphere consists of several gases. Which is the solvent?

• nitrogen

• argon

• carbon dioxide

• oxygen

Which explains why oil does not mix with water?

• difference in polarity

• same polarity

• difference in temperature

• difference in amount

A solution is made of coffee powder and milk in a cup of hot water. Which is the solvent in this solution?

• milk

• coffee powder

• coffee powder and milk

• hot water

At late afternoon, clouds become heavy and bring rainfall. What kind of mixture are rain clouds?

• unsaturated

• saturated

• supersaturated

• either unsaturated or saturated

Which solution contains the maximum amount of solute that can be dissolved in the solvent?

• unsaturated solution

• salt solution

• saturated solution

• sugar solution

Which of the following is homogeneous when mixed?

• gasoline and water

• sugar and oil

• soil and water

• soy sauce and vinegar