*Chemistry Oxygen*2*38*1*

#561

!Chemistry (to be) a science of substances, their structure, their properties and the reactions, that change them into other substances.

Which form of the verb in brackets is the most suitable one for this sentence?

*was

*were

*am

*+is

*are

#562

*!Chemistry (to be) a great und complex subject.

Which form of the verb in brackets is the most suitable one for this sentence?

*are

*will be

*was

*were

*+is

#563

*!Substances (to exist) in any of the three states as solids, liquids or gases.

Which form of the verb in brackets is the most suitable one for this sentence?

*are existed

*+exist

*is existed

*exists

*existing

#564

*!Sulphur, iron and silver (to be) liquids at ordinary conditions.

Which form of the verb in brackets is the most suitable one for this sentence?

*is

*was

*were

*will be

*+are

#565

*!Bromine and mercury (to be) liquids at ordinary conditions.

Which form of the verb in brackets is the most suitable one for this sentence?

*is

*will be

*were

*+are

*was

#566

*!Solid substance (to become) liquids, if heat them to a proper temperature

Which form of the verb in brackets is the most suitable one for this sentence?

*becomes

*+become

*are becoming

*is becoming

*became

#567

*!Liquids (to turn) into gases at very high temperatures.

Which form of the verb in brackets is the most suitable one for this sentence?

*turns

*turned

*are turned

*is turning

*+turn

#568

*!Chemistry studies substances, their structure and properties.

Which question is the general one to this sentence?

*+Does chemistry study substances, their structure and properties?

*What does chemistry study?

*Chemistry studies substances, their structure and prosperities, doesn’t it?

* What science studies substances, their structure and properties?

*Do chemists study substances, their structure and properties?

#569

*!OrganicChemistry is a science of carbon compounds.

Which question is the special one to this underlined words?

*Organic Chemistry is a science of carbon compounds, isn’t it?

*Is organic Chemistry a science of carbon compounds?

*+What science studies carbon compounds?

*Does organic Chemistry study carbon compounds?

*What science is Organic Chemistry?

#570

*!Organic chemistry studies carbon compounds

Which question is a special one to this sentence?

*Has Organic chemistry studied carbon compounds?

*Does Organic chemistry study carbon compounds?

*Did Organic chemistry study carbon compounds?

*+What compounds does Organic Chemistry study?

*Organic chemistry studies carbon compounds, doesn’t it?

#571

*!General chemistry studies inorganic substances.

Which question is a special one to this sentence?

*Has General chemistry studied inorganic substances?

*Does general chemistry study inorganic substances?

*Did general chemistry study inorganic substances?

*+What does general chemistry study?

*General chemistry studies inorganic substances, doesn’t it?

#572

*!Chemistry explains the composition of matter.

Which question is a special one to this sentence?

*Chemistry explains the composition of matter, doesn’t it?

*Has chemistry explained the composition of matter?

*Did chemistry explain the composition of matter?

*Does chemistry explain the composition of matter?

*+What composition does chemistry explain?

#573

*!Chemistry explains the transformations of matter

Which question is a general one to this sentence?

*Do chemists explain the transformations of matter?

*+Does chemistry explain the transformations of matter?

*What transformations does chemistry explain?

*Chemistry explains the transformations of matter ,doesn’t it?

*What science explains the transformations of matter?

#574

*!Oxygen occurs in the free state in the atmosphere

Which question is a special one to the underlined word ?

*Oxygen occurs in the free state in the atmosphere, doesn’t it?

*Does oxygen occur in the freestate in the atmosphere?

*+What element occurs in the free state in the atmosphere?

*In what state does oxygen occur in the atmosphere?

*Where does oxygen occur in the free state?

#575

*!Oxygen is a colorless, odourless and tasteless gas.

Which question is a general one to this sentence?

*Oxygen is a colorless, odourless and tasteless gas, isn’t it?

*What gas is oxygen?

*What chemical characteristics has oxygen?

*+Is oxygen a colorless, odourless and tasteless gas?

*What element is a colorless, odourless and tasteless gas?

#576

*!Oxygen is the third most abundant element in the Universe.

Which question is a general one to this sentence?

*Which element is the third most abundant element in the Universe?

*Oxygen is the third most abundant element in the Universe, isn’t it?

*+Is oxygen the third most abundant element in the Universe?

*Was oxygen the third most abundant element in the Universe?

*Where is oxygen the third most abundant element in the Universe?

#577

*!Oxygen is a highly reactive element.

Which question is a general one to this sentence?

*What element is a highly reactive substance ?

*Oxygen is a highly reactive element, isn’t it?

*Was oxygen a highly reactive element?

*+Is oxygen a highly reactive element?

*What element is oxygen?

#578

*!Oxygen (to make ) up nearly 21% of the Earth’s atmosphere.

Which form of the verb in brackets is the most suitable one for this sentence?

*was made

*is made

*make

*made

*+makes

#579

*!Oxygen (to combine) most other elements.

Which form of the verb in brackets is the most suitable one for this sentence?

*is combined

*was combined

*combined

*+combines

*combine

#580

*!Oxygen (to account) for two thirds of the mass oh the human body.

Which form of the verb in brackets is the most suitable one for this sentence?

*accounted

*was accounted

*+accounts

*account

*is accounted

#581

*!Chemistry is a science of ……

Which word is missed in this sentence?

*gases

*herbs

*plants

*+substances

*metals

#582

*!Substances may exist as solids, liquids or …..

Which word is missed in this sentence?

*metals

*flowers

*herbs

*+gases

*plants

#583

*!Sulphur, iron and silver are…… at an ordinary temperature.

Which word is missed in this sentence?

*granules

*powders

*gases

*+solids

*liquids

#584

*!Bromine and mercury are …… at ordinary conditions

Which word is missed in this sentence?

*powders

*granules

*+liquids

*solids

*gases

#585

*!Oxygen and hydrogen are ….. at an ordinary temperature.

Which word is missed in this sentence?

*liquids

*metals

*acids

*+gases

*solids

#586

*!Edible salt and water are…..

Which word is missed in this sentence?

*acids

*metals

*elements

*+compounds

*gases

#587

*!Gold, iron and silver are …..

Which word is missed in this sentence?

*gases

*acids

*+metals

*salts

*alkalis

#588

*!Mercury is a …… metal as an ordinary temperature.

Which word is missed in this sentence?

*acid

*soft

*hard

*solid

*+liquid

#589

*!........ is the third most abundant chemical element in the Universe, after hydrogen and helium.

Which word is missed in this sentence?

*Nitrogen

*Iron

*Sulphur

*+Oxygen

*Mercury

#590

*!Oxygen is a highly reactive chemical ……

Which word is missed in this sentence?

*solid

*liquid

*metal

*+element

*compound

#591

*!An examiner and a student

An examiner:

“Which chemical element is the third most abundant one in the Universe, after hydrogen and helium?”

A student: _________

Which answer is the most suitable one to this dialogue?

*Mercury

*Gold

*Nitrogen

*Bromine

*+Oxygen

#592

*!An examiner and a student

An examiner:

“What metal has a liquid form at an ordinary temperature?”

A student: _________

Which answer is the most suitable one to this dialogue?

*Gold

*Silver

*Iron

*+Mercury

*Nitrogen

#593

*!An examiner and a student

An examiner:

“What aggregate states do all substances exist in?”

A student: _________

Which answer is the most suitable one to this dialogue?

*Two aggregate states: solids and liquids.

*One aggregate state:solid.

*Two aggregate states: metals and non-metals.

*Two aggregate states: elements and compounds.

*+Three aggregate states: solids, liquids, gases.

#594

*!An examiner and a student

An examiner:

“What great classes all substances are divided into?”

A student: _________

Which answer is the most suitable one to this dialogue?

*Two great classes: metals, non-metals.

*+Two great classes: elements and compounds.

*Two great classes: liquids, solids.

*Two great classes: liquids, gases.

*Two great classes: alkalis, acids

#595

*!An examiner and a student

An examiner:

“What transformations does chemistry explain ?”

A student :_________

Which answer is the most suitable one to this dialogue?

*The transformations of plants

*The transformations of acids

*The transformations of alkalis

*+The transformations of matter

*The transformations of metals

#596

*!An examiner and a student

An examiner:

“What kind of science is chemistry?”

A student :_________

Which answer is the most suitable one to this dialogue?

*A science of plants

*A science of herbs

*+A science of substances

*A science of solids

*A science of elements

#597

*!An examiner and a student

An examiner:

“What composition does chemistry explain?”

A student: _________

Which answer is the most suitable one to this dialogue?

*A composition of acids

*A composition of compounds

*A composition of alkalis

*+A composition of matter

*A composition of salts

#598

*!An examiner and a student

An examiner:

“What structure and properties does chemistry study?”

A student: _________

Which answer is the most suitable one to this dialogue?

*A structure and properties of acids.

*A structure and properties of alkalis

*A structure and properties of metals.

*A structure and properties of salts.

*+A structure and properties of substances.