some non metals and their compounds

Question 1

how is carbon dioxide removed in the carbon cycle

Answer 1

photosynthesis - 6Co+6H20 –> 6O2 + C6H12O6

dissolving- carbon dioxide from air dissolving in the ocean

Question 2

how is carbon dioxide added to the atmosphere

Answer 2

respiration - glucose + oxygen –> carbon dioxide + water + energy
combustion - methane + oxygen –> carbon dioxide + water + energy

Question 3

how is fossil fuels made

Answer 3

remains of dead organism fall to the ocean floor and are buried
soft part turns into petroleum and natural gas
hard shells turn into limestone rock
trees get buries in swamps to make coal carbon dioxide in ait ends up in f`ossil fuels

Question 4

what are the 3 ways carbon dioxide occurs naturally by

Answer 4

1. combustion of carbon compound in plenty of air - CH4 + 2O2 –> CO2 + 2H20
2. reaction with dilute acid and carbonates - CaCO3 + 2HCL –> CaCl2 + CO2+ H20
3. reaction between oxygen and glucose - C6H12O6 + 6O2 –> 6CO2 + 6H2O

Question 5

what are the properties of carbon dioxide

Answer 5

colourless gas with no smell
heavier than air
things will not burn in it
slightly soluble in water forming carbonic acid, H2CO3

Question 6

how is carbon monoxide formed

Answer 6

when carbon compounds burn in too little oxygen

2CH4 + 3O2 –> 2CO + 4H2O

Question 7

what are the properties of carbon monoxide

Answer 7

no smell

Question 8

why is carbon monoxide dangerous

Answer 8

binds with RBC preventing it from carrying oxygen ard the body

Question 9

what is the formula of carbonate

Answer 9

CO3^-2

Question 10

what are the properties of carbonates

Answer 10

insoluble in water except for sodium
react with acid to from sale, water and carbon dioxide
break down when heated to form co2 and oxide

Question 11

where is calcium carbonate found naturally

Answer 11

limestone, chalk and marble

Question 12

why do sodium carbonates not break down

Answer 12

compounds are more stable

Question 13

how is methane formed/ found

Answer 13

natural gas/ gas deposit in ocean to be used as fuel
bacteria break down plant material in absence of oxygen
animals gives out methane as waste gas from digestion

Question 14

name a organic compound

Answer 14

methane

Question 15

where are organic compounds found

Answer 15

in protein, carbohydrate in body
compound in petroleum and coal
plastic and medical drugs

Question 16

what is the study of carbon compounds called

Answer 16

organic chemistry

Question 17

what is inside carbon compounds

Answer 17

carbon, hydrogen (sulfur and nitrogen )

Question 18

what are the greenhouse gases

Answer 18

carbon dioxide and methane

Question 19

how does greenhouse has work

Answer 19

1. sun send out energy in UV rays, which warms earth

2. some of the heat escapes from atmosphere and some is absorbed by greenhouse gas

Question 20

why is there more carbon dioxide and methane in the air

Answer 20

-burn more fossil fuel

increases in animal farming, rice farming and landfill sites

Question 21

what are the effects of climate change

Answer 21

change in air temp, rainfall and wind patterns 
places will become dryer or wetter 
sea levels will rise 
animals that cant adapt will die 
natural disasters

Question 22

how can we prevent global warming

Answer 22

cut down on fossil fuel - public transport or bokes
use clean ways to get electricity like wind power
scientist are burying to underground

Question 23

how is limestone made

Answer 23

sea creatures hv shell or skeleton made of calcium carbonate
when they die the reamins fall to the seafloor
layers of shell and bone becomes rock
soft parts become oil
forces bring them up

Question 24

what is crushed limestone used for

Answer 24

Extracting iron from iron ore
Road building
As chips for concrete

Question 25

what is powdered limestone used for

Answer 25

Neutralise acidity in soil | For flue gas desulfurization

Question 26

what is lime used for

Answer 26

Making steel from iron Neutralise acidity in soil Drying agent in industry

Question 27

what is cement used for

Answer 27

make concrte

Question 28

what is slaked lime used for

Answer 28

Neutralise acidity in soil and leaked affected by acid rain | For flue gas desulfurization

Question 29

how is lime made

Answer 29

it is heated | CaCO3 ⇌ CaO + CO2

Question 30

what is another word for lime

Answer 30

quicklime

Question 31

what is the process of how lime is made

Answer 31

limestone is fed at one end of the kilin and comes out the other air is blown in

Question 32

why does carbon dioxide not react again to make lime

Answer 32

bc it is blown away by air wooshhhhhh

Question 33

what type of reaction is lime

Answer 33

thermol decompostition

Question 34

how is slaked lime made

Answer 34

add water to lime | Ca) + H2O --> Ca(oh)2

Question 35

WHAT TYPE OF REACTION IS SLAKED LIME

Answer 35

EXOTHEMIC- GIVES STEAM OUT

Question 36

WHAT IS LIMEWATER

Answer 36

WEKA SOLUTION OF CALCIUM HYDORXIDE WHICH IS SPARINGLY SOLUBLE IN WATER WHY AM I IN CAPS

Question 37

how is cement made

Answer 37

mixing lime stone with caly, heating it, add gypsum and grind it

Question 38

what is flue gas desulfurisation

Answer 38

removal of sulfur dioxide from waste gases at powered station before they go out

Question 39

how is flue gas desulfurisation carried out

Answer 39

mixture of powdered limetone ot slaked lime and water is sprayed in the waste gas or gases bubble through it

Question 40

give the equation for the reaction of flue gas desulfurisation

Answer 40

Ca(OH)2 + SO2 → CaSO3 + H2O 2CaCO3 + O2 + 4H2) → 2CaSO4.2H2O

Question 41

what is gypsum

Answer 41

hydrated calcium sulfate | used in making cement, plaster board and ect