ESAS · Question Bank

Chemistry

340 of 345 questions match · page 9 of 17. Answer in your head first, then check the solution.

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#161📘 reviewer_appEasy
The chemical formula which shows the relative number of atoms of all the elements present in a compound is called
AMolecular formula
BEmpirical formula
CStructural formula
DCompound formula
#162📘 reviewer_appEasy
The chemical formula which shows the exact number of atoms of all the elements present in a compound is called
AMolecular formula
BEmpirical formula
CStructural formula
DCompound formula
#163📘 reviewer_appEasy
What element is used in DNA synthesis?
Aaluminum
Bcadmium
Cnitrogen
Dzinc
#164📘 reviewer_appEasy
What type of material are used in telephone type relays?
Acopper
Bpalladium
Cvanadium
Daluminum
#165📘 reviewer_appEasy
Chemicals found in wastes from plants, factories, etc.
Anitrogen dioxide
Bcarbon monoxide
Chydrochloric acid
Dsulphur dioxide
#166📘 reviewer_appEasy
Who was the first person to propose that atoms have weights?
AErnest Rutherford
BDemocritus
CJohn Dalton
DJoseph John Thomson
#167📘 reviewer_appEasy
How are substances classified?
AElements or Compounds
BMetals or Non-Metals
CAcids or Bases
DHomogenous or Heterogeneous
#168📘 reviewer_appEasy
What is the result from the combination, in definite proportion of mass of two or more elements?
AMixture
BCompound
CSubstance
DChemical Reaction
#169📘 reviewer_appEasy
How are mixtures classified?
AElements or Compounds
BMetals, Non Metals, or Metalloids
CHomogenous or Heterogeneous
DSuspension, Colloids or Solutions
#170📘 reviewer_appEasy
The mixture of soil and water is an example of what classification of a mixture?
AHomogenous
BSuspension
CColloid
DSolution
#171📘 reviewer_appEasy
A very fine particle of soil when mixed with water will form a cloudy mixture. How is this mixture classified?
AColloid
BSuspension
CSolution
DCompound
#172📘 reviewer_appEasy
The particles of sugar dispersed in water are so small that a clear homogeneous mixture results, what is this mixture called?
AColloid
BCompound
CSuspension
DSolution
#173📘 reviewer_appEasy
Compounds are mostly classified as:
AHomogenous and Heterogenous
BAcids and Bases
CGases, Liquids, and Solids
DMetals and Nonmetals
#174📘 reviewer_appEasy
What is the property of metals that allow them to be rolled without breaking?
ADuctility
BMalleability
CLuster
DElasticity
#175📘 reviewer_appEasy
What is the property of metals that reflect the light that strikes their surfaces, making them appear shiny?
AMalleability
BDuctility
CLuster
DPlasticity
#176📘 reviewer_appEasy
Which of the ff: is not a property of bases?
AFeel slippery on the skin
BTurn litmus paper to blue
CTaste bitter
DDissolve metals producing varous salts and hydrogen gas
#177📘 reviewer_appEasy
An acid can react with a base to produce a _________.
Ahydrogen gas
Bsalt
Coxide
Dhydroxide
#178📘 reviewer_appEasy
Table salt or sodium chloride may be formed by the reaction of:
AHydrochloric acid and sodium bicarbonate
BSodium and Chlorine
CHydrochloric acid and sodium carbonate
DHydrochloric acid and sodium hydroxide
#179📘 reviewer_appEasy
What is another term for "Chemical Change"
AChemical reaction
BPhase change
CState change
DComposition change
#180📘 reviewer_appEasy
"When two or more elements form more than one compound, the ratio of the masses of one element that combine with a given mass of another element in the different compounds is a ratio of small whole numbers" This statement is known as:
AGraham's Law of diffusion
BThe uncertainty principle
CLaw of definite proportion
DLaw of multiple proportion

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