More Chemistry Unit1

Questions and answers on Chemistry unit 1.

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Periodic Table

 1)What is the periodic table divided into?

 2) What is the position of an element related to?

 3)What do atoms bond using?

 4)Metals form ________ compounds.

 5)Non Metals form __________ compounds.

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Answer

1)metals and non metals                                                  Key Words

2) its atomic structure                                                     particles, atoms , element,

3) atoms bond using electrons                                       group, period,

4)ionic compounds                                                         atomic number & structure

5) covalent compounds                   

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Limestone

1)Name some advantages and disadvantages with limestone quarrying.

2)Limestone is thermally decomposed into what?

3)Further reactions make useful products like ...

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Answers

1)advantages- jobs , better roads, recreational facilities, health care facilities

disadvantages- discolour landscape, noise, dust pollute enviroment,traffic congestion

2)Limestone is thermally decomposed into quicklime and CO2.

3) glass , cement

KEY WORDS

cement, clay, kiln, concreate, mortar, glass, sand, sodium carbonate

quicklime, calcium oxide, CO2, slaked lime, calcium hydroxide, limewater

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Metals

1) Less reactive metals are extracted ( reduced) using carbon in a what?

2) More reactive metals are extracted using what?

3) Titanium extraction uses ___________ with sodium or magnesium?

4) Metals are ______ to improve their properties

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Answers

1) Blast furnace                                                      KEY WORDS

2) Electrolysis                                                        iron, raw matierials, coke,

3) Displacement                                                    displaced, strong , easy to shape

4) Alloyed                                                              low density, shape memory, heat

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Crude Oil ( Petroleum)

1) Crude oil is seperated using ____________

2) Hydrocarbons are compounds made of ONLY ___________ & _________

3) Alkanes have the general formula ___________

4) Alkanes burn to give CO2 and water which causes _____________

5) Sulphur impurities burn to give sulphur dioxide cause _____ ______

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Answers

1) Fractional Distillation                                                   KEY WORDS

2) Hydrogen and Carbon                                             hydrocarbons, boiling,         

3) CnH2n+1                                                                 vapourised, acid rain, SO2

4) Global warming                                                       fractional distillation, CO2

5) Acid Rain                                                                

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New Substances from Crude Oil

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Answers

1) cracked                                                                         KEY WORDS

2) unsaturated , carbon-carbon double                            alkenes, double bond,

3) polymers, long                                                              unsaturated, reactive,

4) biodegradable                                                               ethanol, ethene

5) ethanol                                                             

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Plants Oils and Food Additives

1) Plants contain useful natural ____.

2) Vegetable oils can be hardened by reacting _______.

3)Food additives are identified by what?

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Answers

1) Oils                                                                               KEY WORDS

2) Hydrogen                                                                     hydrogen, hardened, oils

3) "e" numbers                                                                 emulsion, chromatography

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The Earth

1)The earth has a ________ structure. It includes.....

2) Volcanoes and ____________ occur at the boundaries of moving plates.

3) The earths atmosphere has changed over _______ of years.

4) Many of the original gases were from _________.

5) Clobal warming increased due to ____.

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Answers

1) layered , crust , mantle, inner and outer core.              KEY WORDS

2) earthquakes                                                                    crust , mantle , core

3) millions                                                                            plates , boundaries,

4) volcanoes                                                                       continents , shapes,

5) CO2                                                                                Pangaea, alfred wegner

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