Bubbling of carbon (IV)oxide into calcium hydroxide solution results in the formation of
CaCO3
CuCO3
ZnCO,sub>3
Na2CO3
MgCO3
Correct answer is A
No explanation has been provided for this answer.
1.08g
40g
10,.8g
21.6g
108g
Correct answer is E
No explanation has been provided for this answer.
The following are heavy chemicals except
tetraoxosulphate (IV) acid
caustic soda
sodium trioxocarbonate (IV)
ethene
dyes
Correct answer is E
No explanation has been provided for this answer.
The main characteristic feature of transition metals is that they
have the same atomic size
are reducing agents
from ions easily
have variable oxidation states
are highly electropositive
Correct answer is D
No explanation has been provided for this answer.
The following are uses of radioactive isotopes except for
sterilization of medical equipment
tracing reaction paths
dating elements
radiography
determining equilibrum positions
Correct answer is E
No explanation has been provided for this answer.