Test Answers

Question 1

What is Buckminsterfullerene, what shape does it have and what is it used for

Answer 1

It is Spherical, it Neutral C60 and is used in drug delivery

Question 2

Propane formula

Answer 2

C3H6O

Question 3

Why does Propanone have a low boiling point ?

Answer 3

The intermolecular forces are
weak

Question 4

Evaluate the three possible methods for extracting tungsten from tungsten oxide

Answer 4

carbon and iron are the cheapest reactants
* hydrogen is the most expensive reactant
* separating solid products is expensive
* in method 1, some tungsten is lost as tungsten carbide
* in method 1, the carbon dioxide produced will escape
* in method 2, the water vapour produced will escape
* in method 2, no separation of solids is needed
* in method 3, tungsten needs to be separated from iron oxide

Question 5

Why are alloy harder

Answer 5

(in an alloy) the atoms are of
different sizes
(so) the layers (of atoms in an
alloy) are distorted
(so in an alloy) the layers slide
over each other less easily (than
in a pure metal)

Question 6

A student wants to compare the reactivity of an unknown metal, Q, with that of zinc.

Answer 6

Since both metals are more reactive than silver
silver nitrate, measure the temperature
1g of Zn metal Q into each flask and stir. Record the temp
The more reactive the metal the larger the temp rise.

Question 7

what is a cation what is the cathode

Answer 7

Cations. The negatively charged electrode in electrolysis is called the cathode . Positively charged ions are called cations . They move towards the cathode

Question 8

how do you describe two graphs for exothermic endothermic

Answer 8

Question 9

describe a test for the double carbon-carbon bond in cycloalkane molecule
Give the result of the test
Test?
Result?

Answer 9

Test = bromine
Result = brown / orange to colorless

Question 10

What are the effects of burning carbon and sulfur on the atmosphere

Answer 10

Carbon dioxide is produce which is a greenhouse gas this affects the surface temperature earth known as global warming. ice caps will melt, thus sea level rise and flooding will occur , extreme weather events become more common. Sulfur will damage to trees buildings acid rain is produced, the oceans will turn more acidic.

Question 11

How can different forms of Poly(ethene) be produced

Answer 11

Formed in different conditions like increased temp or pressure

Question 12

What elements help with plant growth 

Answer 12

Potassium Nitrate and Ammonium phosphate and calcium nitrate

Question 13

Why word ammonium sulfate be made in industrial

Answer 13

 Ammonium sulfate is a fertilizer, it needs to be rapidly produce scaled up to big quantities at low cost

Question 14

What is the chemical formula for cycloalkenes

Answer 14

CnH2n-2

Question 15

What is the test for group 1 ions metal ions in potash alum

Answer 15

Flame test lilac color

Question 16

A Method that could identifying the group one metal ions

Answer 16

Flame emission spectroscopy

Question 17

What is the test for potassium aluminum sulfate with sodium hydroxide

Answer 17

It forms a white precipitate

Question 18

Describe a test to identify the presence of sulfate ions in a solution of potash alum Give the result of the test

Answer 18

Test Barium chloride and Hydrochloric acid
Result White precipitate

Question 19

The activation energy for the reaction between zinc and sulfuric acid is low word F a solution containing metal ions is added what is the most likely formula for the metal ions are dead?
(Al)3+ ( Ca)2+ (Cu)2+ (Na)+

Answer 19

Cu2+ is used as it’s low in the reactivity series

Question 20

For an exothermic reaction how do you make a more economic and efficient reaction

Answer 20

You add more heat and pressure for more collisions but less yield

Question 21

Where can ethanol be produced

Answer 21

Fermentation of sugar cane

Question 22

List the appropriate aspects of planning an any kind of experiment, specifically in this case copper, aluminium and iron against hydrochloric acid.

Answer 22

The independent variables are the metals involved,
Dependant variables the rate of the reaction in this case the gas or temperature.
Control variables concentration hydrochloric acid
* same mass / moles of metal
* same temperature

Question 23

Why is aluminium a faster reactor against hydrochloric acid than copper and iron, what is the reaction

Answer 23

Magnesium higher in the reactive series
single replacement

Question 24

what happens in electrolysis

Answer 24

The cathode is negative and attracts cations these are the hydrogen and Copa whereas the anode is positively charged and attracts the attracting an ions which are also include hydroxyl which

Question 25

Why is it the boiling point increases as you move down the halogens ?

Answer 25

The intermolecular force increases that creating a bigger energy to break it apart

Question 26

Explain why in halogens become less reactive as you go down the table

Answer 26

The reason for this is there are more out of shells, therefore the nucleus has less need to attract an electron as we move down the table.