101)Corrosion of silver causes a black layer of …………
a)Silver nitrate b) silver oxide c) silver sulphide d) silver carbonate
102)To prevent corrosion of iron and steel ……. method is used .
a) electroplating b) anodization c) tinning d) galvanizing
103) In preparation of Aqua regia hydrochloric acid and………….acid are mixed.
a) sulphuric acid b) nitric acid c) carbonic acid d) phosphoric acid
104)The sound of one metal colliding with another makes a noise, this property is called
as ……
a) good conductors b) ductility c) sonority d) malleability
105) ………… exist in a liquid state at room temperature.
a) Chlorine b) Bromine c) Iodine d) Fluorine
106)Ionic compounds are electrically …………..
a) positively charged b) negatively charged c) neutral d) conductor
107) ………..is
Answers
Answer:
101)Corrosion of silver causes a black layer of …………
a)Silver nitrate b) silver oxide c) silver sulphide d) silver carbonate
102)To prevent corrosion of iron and steel ……. method is used .
a) electroplating b) anodization c) tinning d) galvanizing
103) In preparation of Aqua regia hydrochloric acid and………….acid are mixed.
a) sulphuric acid b) nitric acid c) carbonic acid d) phosphoric acid
104)The sound of one metal colliding with another makes a noise, this property is called
as ……
a) good conductors b) ductility c) sonority d) malleability
105) ………… exist in a liquid state at room temperature.
a) Chlorine b) Bromine c) Iodine d) Fluorine
106)Ionic compounds are electrically …………..
a) positively charged b) negatively charged c) neutral d) conductor
107) ………..is
Answer:
101)b- silver oxide
102)a- electroplating
103)b- nitric acid
104)d- malleability
105)b- Bromine
106)d- conductor