Question

Q1.Whichofthefollowingcanbebeatenintothinsheets?
(a)Zinc(b)Phosphorus(c)Sulphur(d)Oxygen
Q2.Whichofthefollowingstatementsiscorrect?
(a)Allmetalsareductile.
(b)Allnon-metals are ductile.
(c)Generally, metals are ductile.
(d)Some-metals are ductile.
Q3.Fillintheblanks.
(a)Phosphorusisvery___________non-metal.
(b)Metalsare___________conductorsofheatand___________.
Q4.Salonitookapieceofburningcharcoalandcollectedthegasevolvedinatesttube.
(a)Howwillshefindthenatureofthegas?
(b)Writedownwordequationsofallthereactionstakingplaceinthisprocess.
Q5.Whydocoppervesselsdevelopagreenishlayerwhenexposedtomoistair?
Q6.Writethedifferencebetweenmetaloxidesandnon-metal oxides.

Answer 1

Answer:

1. a

2.c

3.reactive

4.good,electricity

4.

5.This happens due to corrosion.When Copper vessels Mostly in rainy seasons come in contact with the Atmospheric gases present in air ,it then reacts and form copper carbonate and copper hydroxide which develops green coating.

6.Metal react with oxygen to form metal oxide while non metal react with oxygen to form non metal oxide.

Metal oxides are basic in nature while non metal oxides are acidic in nature.

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