The action of zinc on an acid produces
chlorine
hydrogen
nitrogen
sulphur
water vapour.
Correct answer is B
No explanation has been provided for this answer.
The high boiling point of hydrogen fluoride can be explained in terms of?
covalent bonds.
dative bonds.
dipole-dipole bonds
electrovalent (ionic) bonds.
hydrogen bonds.
Correct answer is E
Hydrogen fluoride is formed through covalent bonding (electron sharing) between a hydrogen atom and a fluorine atom.
The reason is the strong electronegativity of the fluorine atom, which causes hydrogen and fluorine atoms to form hydrogen bonds in the liquid phase.
What type of bond holds hydrogen fluoride molecules together when forming larger aggregate?
Covalent
Dative
Hydrogen
Ionic
Metallic
Correct answer is C
No explanation has been provided for this answer.
A device used in the laboratory for intermittent production of gases without heating is
aspirator
delivery tube
fume cupboard
kipp’s apparatus
muller counter
Correct answer is D
No explanation has been provided for this answer.
greater stability in solution
lower electrical charge
smaller mass
stronger tendency to accept electrons
stronger tendency to lose electrons.
Correct answer is D
In an electrolytic cell, when two metallic ions of the same concentration migrate to a graphite cathode, the one that would be preferentially discharged is the one that has the stronger tendency to accept electrons and become a neutral atom.