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metals and non metals Flashcards

metallurgy

1
Q

a metal which gives hydrogen gas on reacting with dilute acid and alkali

A

zinc

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2
Q

a property possessed by metals in which they can be beaten into sheets

A

malleability

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3
Q

an allotrope of nonmetal which allows electricity to pass through it

A

carbon

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4
Q

a metal which is unaffected by dilute or concentrated acid

A

aluminum

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5
Q

2 best malleable metals

A

gold and silver

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6
Q

a metal which is a good conductor of heat and electricity

A

silver

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7
Q

a metal which is so soft it can be cut with a knife

A

sodium

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8
Q

non metal which is a good conductor of electricity

A

graphite

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9
Q

non metal which is a liquid at room temperature

A

bromine

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10
Q

what are the characteristics of non metals

A

brittle

acidic oxides

covalent chlorides

5,6,7 valence electrons

discharged at the anode

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11
Q

metallic oxide which is amphoteric on nature

A

zinc oxide

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12
Q

metallic oxide which cannot be reduced by normal reducing agents

A

magnesium oxide

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13
Q

hydroxide of this metal is soluble in sodium hydroxide solution

A

lead

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14
Q

chemically rust is __________

A

Fe2O3.xH2O

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15
Q

metal which reacts reversibily with steam

A

iron

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16
Q

metals turn litmus paper_________

A

blue

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17
Q

highly ductile metal

A

silver

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18
Q

the reducing agent used for reuduction of copper2oxide to copper

A

hydrogen

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19
Q

zinc oxide can only be reduced by _________

A

coke

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20
Q

which oxides can be reduced by heating

A

mercury and silver

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21
Q

oxides of sodium and pottasium can be reduced by ___________

A

electrolysis

22
Q

the metals whose hydroxide does not decompose on heating but its nitrate decomposes is ______________

23
Q

state 1 observation when zinc granule is added to copper sulphate solution

A

a red metal starts precipitating and the blue color of copper sulphate solution fades due to the formation of colourless zinc sulphate

24
Q

the gas evolved on reaction of aluminium with boiling concentrated caustic alkali solution

25
Q

examples of metalloids

A

boron

germanium

arsenic

26
Q

why aluminium cannot be obtained by the reduction of its oxide with carbon

A

aluminium has a greater affinity for oxygen than carbon

27
Q

2 metals which on reaction with dilute nitric acid produce hydrogen gas

A

magnesium and manganese

28
Q

why does calcium not occur in free state

A

calcium is more electropositive element than hydrogen because it is placed higher than hydrogen in the reactivity series

this means it reacts with oxygen and water immediately thus it does not occur freely in free state

29
Q

a non metal which reacts with concentrated nitric acid to form its own acid as one of the products

30
Q

2 necessary conditions for rusting

A

–> presence of oxygen and moisture

–> presence of carbon dioxide accelerates the formation of rust

31
Q

2 ways in which rusting can be prevented

A

–> by painting

–> by galvanization

32
Q

a metallic oxide which cannot be reduced with hydrogen

A

copper oxide [CuO]

33
Q

a metal which is lighter than water

34
Q

a metal which is unaffected by dilute or concentrated acids

35
Q

non metal which forms acidic and neutral oxides

36
Q

non metal which has a metallic lustre

37
Q

what oxides do metal form

A

basic oxides

38
Q

what oxides do non metal form

A

acidic oxides

39
Q

non metal which is slightly soluble in water chemically reactive and spontaneously ignite in an abundant supply of air

A

white phosphorus

40
Q

a metal which oxidises in air and reacts explosively in water

41
Q

nitric acid can be stored in an aluminium container but sodium hydroxide cannot be stored in it

A

the nitric acid reacts with aluminium to form a thin protective aluminium oxide layer on the aluminium surface. This oxide layer renders aluminium passive and prevents it to further react or dissolving in nitric acid.

Aluminum is more reactive than Sodium, so displacement reaction will occur and aluminum will displace sodium from sodium hydroxide

2Al + 2NaOH + 2H2O –> 2NaAlO2 + 3H2

42
Q

non metals dont reactwith _____ & ________

A

water and dilute acids

43
Q

metals react wtih water to form _____ and _____

A

oxides and hydroxides

44
Q

metals react wtih dilute acids to form _____ and _____

A

salt and evolve hydrogen gas

45
Q

the metallic oxide which cannot be reduced by hydrogen

A

zinc oxide

46
Q

non metals turns neutral litmus _____ color

47
Q

1 metal that coul be obtained by the reduction of its oxides with metals

48
Q

2 metals forming hydroxides that decompose on heating

A

zinc and iron

49
Q

2 metals which dont react with steam

A

copper and silver

50
Q

what color is cuso4

chemistry (14 decks)

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