This is the Multiples Choice Questions Part 4 of the Series in General chemistry as one of the General Engineering and Applied Sciences (GEAS) topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including past Board Questions in General Engineering and Applied Sciences (GEAS) field.
Online Questions and Answers in General Chemistry Series
Following is the list of multiple choice questions in this brand new series:
Continue Practice Exam Test Questions Part IV of the Series
Choose the letter of the best answer in each questions.
151. What is the unit of molar mass?
- A. amu
- B. mole
- C. grams
- D. grams per mole
152. “The total pressure of a mixture of gases equals the sum of the partial pressures of each of the gases in the mixture”. This statement is known as __________.
- A. Dalton’s law of partial pressure
- B. Gay-Lusaac law
- C. Boyle’s law
- D. Charle’s law
153. The dry air is composed of how many percent nitrogen?
- A. 73.1%
- B. 74.4%
- C. 76.1%
- D. 78.1%
154. The dry air is composed of how many percent oxygen?
- A. 20.9 %
- B. 21.2 %
- C. 22.1 %
- D. 23.7 %
155. How much carbon dioxide is present in dry air?
- A. 0.003 %
- B. 0.03 %
- C. 0.3 %
- D. 3 %
156. What is the mixing of gases due to molecular motion called?
- A. Diffusion
- B. Effusion
- C. Fission
- D. Fusion
157. What refers to the passage of molecules of a gas from one container to another through a tiny opening between the containers?
- A. Diffusion
- B. Effusion
- C. Fission
- D. Fusion
158. The rate of effusion of a gas is inversely proportional to the square root of its molar mass. Who discovered this?
- A. Gilbert Lewis
- B. John Tyndall
- C. Robert Brown
- D. Thomas Graham
159. What law states that the rate of effusion of a gas, which is the amount of gas that through the hole in a given amount of time, is inversely proportional to the square root of its molar mass?
- A. Henry’s law
- B. Graham’s law of effusion
- C. Hund’s law
- D. Lewis theory
160. What is a poisonous gas generated mostly by motor vehicles?
- A. Carbon monoxide
- B. Carbon dioxide
- C. Hydroxide
- D. Nitric acid
161. What is considered as one of the pollutants responsible for among and acid rain?
- A. Sulfur dioxide
- B. Nitrogen dioxide
- C. Carbon dioxide
- D. Hydroxide
162. What refers to the forces of attraction that exist between molecules in a compound?
- A. Interaction forces
- B. Dispersion forces
- C. Intermolecular forces
- D. Induction forces
163. All are basic types of van der Waals forces except one. Which one?
- A. Dipole-dipole interaction
- B. London dispersion forces
- C. Heat bonding
- D. Hydrogen bonding
164. The three types of intermolecular forces exist in neutral molecules are collectively known as van der Waals forces. This is named after ________.
- A. Diderick van der Waals
- B. Derick van der Waals
- C. Doe van der Waals
- D. Eric van der Waals
165. A dipole has how many electrically charged pole(s)?
- A. 1
- B. 2
- C. 3
- D. 4
166. Compounds containing hydrogen and other element are known as _________.
- A. Hydroxides
- B. Hydrides
- C. Hydros
- D. Hydrates
167. What is a special kind of dipole-dipole interaction formed when a hydrogen atom bonded to a highly electronegative atom is attracted to the lone pair of a nearby electronegative atom?
- A. Hydride bond
- B. Hydro bond
- C. Hydrogen bond
- D. Hydrate bond
168. What is the process of changing from gas state to liquid state?
- A. Sublimation
- B. Condensation
- C. Deposition
- D. Vaporization
169. What is the process of changing from liquid state to solid state?
- A. Melting
- B. Freezing
- C. Sublimation
- D. Condensation
170. What is the process of changing fro, liquid state to gas state?
- A. Vaporization
- B. Sublimation
- C. Condensation
- D. Deposition
171. What is the process of changing from solid state to gas state?
- A. Vaporization
- B. Deposition
- C. Sublimation
- D. Condensation
172. What is the process of changing from gas state to solid state?
- A. Deposition
- B. Vaporization
- C. Condensation
- D. Sublimation
173. What is the process of changing from solid state to liquid state?
- A. Freezing
- B. Melting
- C. Condensation
- D. Vaporization
174. What refers to the amount of heat absorbed by one mole of a substance to change from solid to liquid?
- A. Molar heat of vaporization
- B. Molar heat of solidification
- C. Molar heat of fission
- D. Molar heat of fusion
175. What refers to the amount of heat released by one mole of a substance when it change from liquid to solid?
- A. Molar heat of vaporization
- B. Molar heat of solidification
- C. Molar heat of fission
- D. Molar heat of fusion
176. What refers to the amount of heat required by one mole of a substance to change from liquid to gas?
- A. Molar heat of vaporization
- B. Molar heat of solidification
- C. Molar heat of fission
- D. Molar heat fusion
177. What refers to the amount of heat required by one mole of a substance to change from gas to liquid?
- A. Molar heat of vaporization
- B. Molar heat of solidification
- C. Molar heat of condensation
- D. Molar heat of fusion
178. Liquid that vaporizes easily are called ______ liquids.
- A. volatile
- B. nonvolatile
- C. surfactant
- D. hydrophilic
179. What refers to the temperature above which a gas cannot be liquefied by an increase in pressure?
- A. Absolute temperature
- B. Absolute zero
- C. Critical temperature
- D. Maximum temperature
180. What is a homogeneous mixture made of particles that exist as individual molrcules or ions?
- A. Solution
- B. Solute
- C. Solvent
- D. Colloid
181. What is the component of a solution that is dissolved?
- A. Solvent
- B. Solute
- C. Catalyst
- D. Colloid
182. What is the component of the solution in which the solute is dissolved?
- A. Solvent
- B. Catalyst
- C. Reactant
- D. Medium
183. Bronze is a solid solution of copper and tin. Which of the following is true?
- A. Tin is a solvent.
- B. Copper is a solute.
- C. Copper is the solvent.
- D. The solution is called aqueous solution.
184. When the solvent of the solution is water, it is a/an _____ solution.
- A. wet
- B. liquid
- C. aqueous
- D. fluid
185. What is the most common solvent in medicines?
- A. Paracetamol
- B. Acid
- C. Ethanol
- D. Starch
186. What is the term generally used to describe the combination of solute molecules or ions with solvent molecules?
- A. Solubility
- B. Solvation
- C. Saturation
- D. Transformation
187. What is the term used to describe the maximum amount of solute that a given solvent can dissolve to give a stable solution at a given temperature?
- A. Solubility
- B. Solvation
- C. Saturation
- D. Transformation
188. When the maximum amount of solute is dissolved in the given solvent at a stated temperature, this solution formed is __________.
- A. unsaturated
- B. saturated
- C. supersaturated
- D. undersaturated
189. When the solution contains less solute particles than the maximum amount the solvent can dissolve at that temperature, the solution is ____________.
- A. unsaturated
- B. saturated
- C. supersaturated
- D. undersaturated
190. When the solution contains more solute particles than the solvent can normally hold, the solution is ________.
- A. unsaturated
- B. saturated
- C. supersaturated
- D. undersaturated
191. What is the most common solution on earth?
- A. Air
- B. Seawater
- C. Blood
- D. Freshwater
192. Solutions composed of two or more metals are called ________.
- A. saturated solutions
- B. supersaturated solutions
- C. unsaturated solutions
- D. alloys
193. The solubility of a substance in another substance is affected by the following factors except __________.
- A. nature of solute and solvent
- B. pressure
- C. volume
- D. temperature
194. Liquids that do not mix are said to be _______.
- A. miscible
- B. immiscible
- C. soluble
- D. nonsoluble
195. Water and alcohol are both liquids that can be mixed in any proportion. They are said to be __.
- A. miscible
- B. immiscible
- C. soluble
- D. nonsoluble
196. How will an increase in temperature in solids affect the solubility?
- A. It will cause a decrease in solubility.
- B. It will not affect the solubility at all.
- C. It will slightly affect solubility.
- D. It will cause an increase in solubility.
197. How will an increase in temperature of gases dissolving in liquids affect the solubility?
- A. It will cause a decrease in solubility.
- B. It will not affect solubility at all.
- C. It will slightly affect solubility.
- D. It will cause an increase in solubility.
198. How does pressure affects the solubility of gases in liquids?
- A. It decreases solubility.
- B. It does not affect solubility at all.
- C. It slightly affects solubility.
- D. It increases solubility.
199. How does pressure affects the solubility in liquids or of liquids in another liquid?
- A. It decreases solubility.
- B. It does not affect solubility at all.
- C. It slightly affects solubility.
- D. It increases solubility.
200. “The solubility of a gas in liquid is directly proportional to the partial pressure of the gas above the solution.” This is known as ______.
- A. Hund’s law
- B. Pascal’s law
- C. Henry’s law
- D. Dalton’s law
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