4. Which of the following abilities is not a physical property of matter?
a ability to conduct heat
b
ability to dissolve in other substances
С
ability to react chemically with other
substances
d ability to conduct electricity

Option C is correct = Ability to react chemically with other substance.

Explanation:

Physical properties:

Physical properties are those properties which can be measured without changing the composition of mater. We can observe the object and tell its physical properties like its texture, physical appearance, color, melting point, boiling point, odor, solubility,  density etc.

Ability to conduct heat

(Physical property)

Ability to dissolve in other substance

(Physical property)

Ability to conduct electricity

(Physical property)

Chemical properties:

Chemical properties involve chemical reaction or we can say that change is happen in mater during chemical reaction and the properties, we measured  during this or as a result of this reaction is called chemical properties. Like flammability, toxicity, combustion, decomposition etc.

Ability to react chemically with other substance.

(chemical property)

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o