ESAS · Question Bank

Chemistry

345 of 345 questions match · page 13 of 18. Answer in your head first, then check the solution.

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#241📘 reviewer_appEasy
The dry air is composed of how many percent oxygen?
A20.9 %
B21.2 %
C22.1 %
D23.7 %
#242📘 reviewer_appEasy
How much carbon dioxide is present in dry air?
A0.003 %
B0.03 %
C0.3 %
D3 %
#243📘 reviewer_appEasy
What is the mixing of gases due to molecular motion called?
ADiffusion
BEffusion
CFission
DFusion
#244📘 reviewer_appEasy
What refers to the passage of molecules of a gas from one container to another through a tiny opening between containers?
ADiffusion
BEffusion
CFusion
DFission
#245📘 reviewer_appEasy
The rate of effusion of a gas is inversely proportional to the square root of its molar mass. Who discovered this?
AGilbert Lewis
BJohn Tyndall
CRobert Brown
DThomas Graham
#246📘 reviewer_appEasy
What law states that the rate of effusion of gas, which is the amount of gas that moves through the hole in a given amount of time, is inversely proportional to the squareroot of its molar mass?
AHenry's law
BGraham's law of effusion
CHund's law
DLewis theory
#247📘 reviewer_appEasy
What is a poisonous gas generated mostly by motor vehicles?
ACarbon monoxide
BCarbon dioxide
CHydroxide
DNitric acid
#248📘 reviewer_appEasy
What is considered as one of the pollutants responsible for smog and acid rain?
ASulfur dioxide
BNitrogen dioxide
CCarbon dioxide
DHydroxide
#249📘 reviewer_appEasy
What refers to the forces of attraction that exist between molecules in a compound?
AInteraction forces
BDispersion forces
CIntermolar forces
DInduction forces
#250📘 reviewer_appEasy
All are basic types of van der Waals forces except one. Which one?
ADipole-dipole interaction
BLondon dispersion forces
CHeat bonding
DHydrogen bonding
#251📘 reviewer_appEasy
The three types of intermolar forces exist in neutral molecules collectively known as van der Waals forces. This is named after __________
ADiderik van der Waals
BDerick van der Waals
CDoe van der Waals
DEric van der Waals
#252📘 reviewer_appEasy
Compounds containing hydrogen and other element are known as ________
AHydroxides
BHydrides
CHydros
DHydrates
#253📘 reviewer_appEasy
Compounds containing water molecules loosely bound to other components are known as ________
AHydroxides
BHydrides
CHydros
DHydrates
#254📘 reviewer_appEasy
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?
AHydride bond
BHydrogen bond
CHydro bond
DHydrate bond
#255📘 reviewer_appEasy
The amount of heat absorbed by one mole of a substance to change from solid to liquid?
Amolar heat of vaporization
Bmolar heat of solidification
Cmolar heat of fission
Dmolar heat of fusion
#256📘 reviewer_appEasy
Liquids that vaporizes easily are called _________ liquids
Avolatile
Bnonvolatile
Csurfactant
Dhydrophilic
#257📘 reviewer_appEasy
What refers to the temperature above which a gas cannot be liquified by an increase in pressure?
AAbsolute temperature
BAbsolute zero
CCritical temperature
DMaximum temperature
#258📘 reviewer_appEasy
Bronze is a solid solution of copper and tin. Which of the ff is true?
ATin is the solvent
BCopper is the solute
CCopper is the solvent
DThe solution is called aqueous solution
#259📘 reviewer_appEasy
What is the term generally used to describe the combination of solute molecules or ions with solvent molecules?
ASolubility
BSolvation
CSaturation
DTransformation
#260📘 reviewer_appEasy
When the maximum amount of solute is dissolved in the given solvent at a stated temperature, the solution formed is ________
Aunsaturated
Bsaturated
Csupersaturated
Dundersaturated

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