Ethiopia Grade 12 Chemistry Unit 1: Solutions Question Answers

Ethiopia Grade 12 Chemistry Unit 1: Solutions Question Answers:  Text Book Practice the sample multiple-choice question for Grade 12 Chemistry Entrance examination.

Ethiopia Grade 12 Chemistry

Unit 1: Solutions

1. What is the meaning of Mg(OH)

  • A) Milk of Magnesia
  • B) Magnesium
  • C) Hydroxide
  • D) All of the above

Answers: A) Milk of Magnesia Magnesium hydroxide is the inorganic compound with the chemical formula Mg(OH)₂. It occurs in nature as the mineral brucite.

2. A colloid consists of two parts

  • A) True
  • B) False

Answers: A) True: A colloid is a mixture in which one substance of microscopically dispersed insoluble particles is suspended throughout another substance.

3. Which is an example of a colloid?

  • A) Milk,
  • B) Jelly,
  • C) Muddy water,
  • D) All of the above

Answers: D) All of the above

4. The light beam can pass through the colloidal mixture.

  • A) True
  • B) False

Answers: A) True

5. Which is an example of a gas?

  • A) Air,
  • B) Water,
  • C) Muddy water,
  • D) Alcoholic beverage

Answers: A) Air

6. Which is an example of a liquid?

  • A) Acetone
  • B) Water,
  • C) Ethanol
  • D) All of the above

Answers: D) All of the above

7. Match the following

Solutions

 Example

A) gas-gas I) Coca-cola
B)liquid-liquid II) Air
C) Gas-liquid III) alloys
D) Solid-liquid IV) Water
E)solid-solid V) Saltwater

Answers:

  • A) : II)
  • B) : IV)
  • C) : I)
  • D): V)
  • E) : III)

8) Ethanol mixed with water but old does not. Why?

  • A) Because both are Miscible liquids
  • B) Because of prominent solvent
  • C) Because of  like dissolves like
  • D) Because of  dislike dissolves like

Answers: C. “Like dissolves like” is an expression used by chemists. It refers to “polar” and “nonpolar” solvents and solutes. Basic example: Water is polar. Oil is non-polar. Water will not dissolve oil.

09. Which of the following is NOT an immiscible liquids

  • A) Oil and Water
  • B) Pentane and Acetic Acid
  • C) Benzene and Carbon tetrachloride
  • D) All of the above

Answers: C) Benzene (C6H6 ) and Carbon tetrachloride (CCl4) these two liquids are said to be miscible

10.) London forces refer to

  • A) Acting between atoms and molecules
  • B) It is a temporary attractive force
  • C) its the is the weakest intermolecular force.
  • D) All of the above

Answers: D) The LDF (London Dispersion Force) is named after the German-American physicist Fritz London.


 

Self Practice Question Unit 1: Solutions

1. A solution is a:

  • A) heterogeneous mixture
  • B) homogeneous
  • C) Suspension
  • D) colloid

2.  Soda water is an example of:

  • A) liquid-liquid
  • B) solid-liquid solution
  • C) gzs-liquid solution
  • D) gas-gas solution

3. Which of the following substances are not readily miscible within each Other’?

  • A) C6H6 and CCl4
  • B) C2H5OH and CCl4
  • C) C2H5OH and H2O
  • D) CH3OH and H2O

4. Rate of dissolution is largely dependent upon

  • A) the inter-particle forces
  • B) the Surface area of Solid Solute
  • C) the temperature of the system
  • D) the pressure of the system

5. the quantitative relationship between gas solubility and pressure is given by:

  • A) Raoult’s law
  • B) Henry’s law
  • C) Hess’s law
  • D) Dalton’s law

6. When a non-volatile solute is added to a pure solvent the:

  • A) vapour pressure Ofthe Solvent decreases.
  • B) vapour pressure Ofthe solvent increases.
  • C) boiling point Ofthe Solution decreases.
  • D) freezing point of the solution increases.

7. Which of the following is not true about ideal solutions?

  • A) the volume of an ideal solution is the sum Of the volume Ofits pure components
  • B) there is no expansion or contraction on mixing
  • C) the heat of solutiion is zero
  • D) they deviate Raoult’s law

2 thoughts on “Ethiopia Grade 12 Chemistry Unit 1: Solutions Question Answers”

Leave a Comment