TEST BANK CHEMISTRY P1 (2025)LATEST
PREDICTED PAPER
A solution of an acid with pH 1 was diluted with water by a factor
of 100 . Calculate the change in pH of this diluted acid solution. -
ANSWER-(change) pH increases (1 mark)
by 2 units from pH 1 to pH 3 (1 mark)
Describe the structure of graphene and explain how this structure
contributes to its properties.- ANSWER-Graphene is a single layer
of carbon atoms arranged in a two-dimensional hexagonal lattice
(1 mark)
Each carbon atom is covalently bonded to three other carbon
atoms, leaving one delocalized electron per atom (1 mark)
allow graphene to conduct electricity (1 mark)
Explain how the structure of fullerenes makes them suitable for
use in drug delivery systems within the body. -
ANSWER-Fullerenes are molecules of carbon shaped like hollow
balls (1 mark)
Their hollow structure allows them to encase other molecules,
making them ideal for transporting drugs to specific parts of the
body (1 mark)
Explain the trend from gases to solids down Group 7 from fluorine
to iodine. - ANSWER-the molecules become larger (1 mark)
PREDICTED PAPER
A solution of an acid with pH 1 was diluted with water by a factor
of 100 . Calculate the change in pH of this diluted acid solution. -
ANSWER-(change) pH increases (1 mark)
by 2 units from pH 1 to pH 3 (1 mark)
Describe the structure of graphene and explain how this structure
contributes to its properties.- ANSWER-Graphene is a single layer
of carbon atoms arranged in a two-dimensional hexagonal lattice
(1 mark)
Each carbon atom is covalently bonded to three other carbon
atoms, leaving one delocalized electron per atom (1 mark)
allow graphene to conduct electricity (1 mark)
Explain how the structure of fullerenes makes them suitable for
use in drug delivery systems within the body. -
ANSWER-Fullerenes are molecules of carbon shaped like hollow
balls (1 mark)
Their hollow structure allows them to encase other molecules,
making them ideal for transporting drugs to specific parts of the
body (1 mark)
Explain the trend from gases to solids down Group 7 from fluorine
to iodine. - ANSWER-the molecules become larger (1 mark)
