A calcium atom and a calcium ion have the same
chemical properties
electric charge
electronic structure
number of electrons
number of neutrons
Correct answer is E
No explanation has been provided for this answer.
Which is NOT a synthetic polymer?
nylon
Orion
Perspex
polystyrene
wool
Correct answer is E
No explanation has been provided for this answer.
The reaction C2H6 → C2H + H2 is known as
dehydration
dehydrogenation
displacement
hydrogenation
reduction
Correct answer is B
No explanation has been provided for this answer.
The boiling point of water is higher than the boiling point of ethanol because
the bonding in water is electrovalent (ionic) whereas the bonding in ethanol is convalent
the hydrogen bonding between water molecules is stronger than the hydrogen bonding between ethanol molecules
water has a higher lattice energy than ethanol.
water has hydrogen bonding between its molecules but ethanol has no hydrogen bonging between its molecules;
water is a better solvent than ethanol.
Correct answer is B
No explanation has been provided for this answer.