-2 to + 3
- 2 to + 6
+ 6 to + 3
+ 7 to + 6
Correct answer is C
No explanation has been provided for this answer.
A visible change is observed when a strip of iron is placed in an aqueous solution of
FeSO4
ZnSO4
CuSO4
MgSO4
Correct answer is C
No explanation has been provided for this answer.
Which of the compounds will leave a metal residue when heated?
Cu(NO 3 )2
AgNO3
K2CO3
CaCO3
Correct answer is B
No explanation has been provided for this answer.
CuSO4 5H2O can be obtained from an aqueous solution of copper (ll) tetraoxosulphate (VI) by
evaporation to dryness
using chromatography
precipitation
crystallization
Correct answer is D
No explanation has been provided for this answer.
Average rate of evolution of gas
Total mass of gas evolved during the reaction
Time taken for the reaction to reach completion
lnitial reaction rates
Correct answer is B
No explanation has been provided for this answer.