A shiny brown metal X when exposed to the atmosphere undergoes corrosion and develops a greenish layer Y on its surface. Identify X and Y.

X: Copper
Y: Copper sulphate

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X: Copper
Y: Copper carbonate

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X: Iron
Y: Iron oxide

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X: Iron
Y: Iron hydroxide

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Solution

The correct option is B X: Copper
Y: Copper carbonate
From the given options, only copper is a shiny brown metal. When exposed, it reacts with carbon dioxide, oxygen and moisture present in atmosphere and forms a greenish coating of basic copper carbonate.
This is called tarnishing of copper.

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Q. A shiny brown metal X when exposed to the atmosphere undergoes corrosion and develops a greenish layer Y on its surface. Identify X and Y.

3 . W h a t t y p e o f c h a n g e t a k e s p l a c e w h e n a r e a c t i o n o c c u r s b e t w e e n i r o n a n d c o p p e r s u l p h a t e s o l u t i o n ? (a) P h y s i c a l c h a n g e (b) C h e m i c a l c h a n g e (c) B o t h p h y s i c a l a n d c h e m i c a l c h a n g e (d) N o c h a n g e 4 . T h e c o l o u r o f t h e l a y e r d e p o s i t e d o n i r o n n a i l s d i p p e d i n c o p p e r s u l p h a t e s o l u t i o n i s : (a) g r e e n (b) r e d d i s h b r o w n (c) g r e e n i s h b l u e (d) c o l o u r l e s s 5 . T h e l a y e r d e p o s i t e d o n i r o n n a i l s d i p p e d i n c o p p e r s u l p h a t e s o l u t i o n i s d u e t o : (a) i r o n (b) c o p p e r (c) s u l p h u r (d) o x y g e n

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A shiny brown metal X when exposed to the atmosphere undergoes corrosion and develops a greenish layer Y on its surface. Identify X and Y.

The correct option is B X: Copper Y: Copper carbonateFrom the given options, only copper is a shiny brown metal. When exposed, it reacts with carbon dioxide, oxygen and moisture present in atmosphere and forms a greenish coating of basic copper carbonate. This is called tarnishing of copper.

The correct option is B X: Copper
Y: Copper carbonate
From the given options, only copper is a shiny brown metal. When exposed, it reacts with carbon dioxide, oxygen and moisture present in atmosphere and forms a greenish coating of basic copper carbonate.
This is called tarnishing of copper.