chemistry

Question 1

propeties of alkanes

Answer 1

only single bond
saturated
bromine water stays orange

Question 2

propeties of alkene

Answer 2

has double bond
unsaturated
bromine water turns colourless

Question 3

sp3 exam question

Answer 3

1s 3p orbitals
s and p orbitals
each new orbitals contains one electron
4 sp3 orbitals formed
s increases energy level
p decreases energy level
all have the same energy level
hybrid orbitals have an angle of 109.5 tetrahedral shape

Question 4

short hydrocarbon chain

Answer 4

lower boiling point cause weaker intermolecular forces due to smaller chains

Question 5

long hydrocarbon chain

Answer 5

higher boiling point cause stronger intermolecular forces due to longer chain

Question 6

straight hydrocarbon chain

Answer 6

high boiling point cause chains are closer together so more surface contact makes stronger intermolecular forces

Question 7

branched hydrocarbon chain

Answer 7

lower boiling point cause branches means further away so less surface contact makes weak intermolecular forces

Question 8

complete combustion

Answer 8

alkane + oxygen = carbon dioxide + water

Question 9

incomplete combustion

Answer 9

alkane + oxygen = carbon / carbon monoxide + water

Question 10

symmetric alkenes

Answer 10

same groups on either side of the double bond

Question 11

asymmetric alkenes

Answer 11

different groups on either side of the double bond

Question 12

addition

Answer 12

a reaction where two or more molecules join together to give a single product

Question 13

electrophiles

Answer 13

electron pair acceptors and are attracted to areas of high electron density

Question 14

polypropene

Answer 14

strong
used for
crates
ropes
carpet

Question 15

polystyrene

Answer 15

lightweight
mouldable
used for
packaging

Question 16

PVC

Answer 16

rigid
strong
used for
window frames
pipes