The alloy used for welding and plumbing contains
aluminum and copper.
copper and tin
iron and aluminum.
lead and antimony.
lead and tin.
Correct answer is E
No explanation has been provided for this answer.
Which metal will dissolve in aqueous sodium hydroxide?
aluminium
copper
iron
sikeer
tin
Correct answer is A
No explanation has been provided for this answer.
Which compound can be used as a reducing agent in a reaction?
Cl2
KMnO4
KCr2O7
MnO2
Na2SO3
Correct answer is E
No explanation has been provided for this answer.
what dose the following equation illustrate? 238U92→234Th90+4He2
Artificial radioactivity
nuclear fission
nuclear fusion
radio-decomposition
spontaneous disintegration
Correct answer is E
No explanation has been provided for this answer.