Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

chemistry (chapter one) > alloys > Flashcards

alloys Flashcards

You may prefer our related Brainscape-certified flashcards:
Periodic Table flashcards Chemistry 101 flashcards AP® Chemistry flashcards Organic Chemistry 101 flashcards
1
Q

scandium forms how many alloys?

A

one.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is the first alloy in the curriculum?

A

scandium- Aluminum alloy.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is scandium aluminum alloy used in?

A

in the manufacture of meg fighter jets.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is scandium used in?

A

used in the mercury vapor lamps.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

which is the most active, has limited uses, and is also one of the rarest elements in the first transition series?

A

scandium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what are mercury vapor lamps used for?

A

they are used to produce light with high quality thus used in TV photography at night

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is the second alloy in your curriculum?

A

titanium- aluminum alloy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Titanium aluminum alloy is used in what?

A

manufacture of space shuttles and aircrafts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

TiO2 compound is used in what?

A

manufacture of sun protection cosmetics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Titanium is used in medicine in what?

A

dental implants and artificial joints

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

vanadium is added to which alloy/element? and why?

A

added to steel, to form an alloy which is used in the manufacture of car springs.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the most important compound of vanadium? and what are it’s uses?

A

vanadium penta oxide, used in the manufacture of dyes used in ceramics and glass industry, and used as a catalyst in the manufacture of superconducting magnets.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Element which forms a non-porous layer on it’s surface?

A

chromium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

elements used to plate other metals?

A

chromium, nickel and zinc

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

element used in leather tanning?

A

chromium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

elements used in dry cells, dry batteries?

A

Manganese MnO2, Cobalt and Nickel (Nickel cadmium battery?

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

used as fungicide?

A

Mnganese sulphate MnSo4 and cupper sulphate CuSo4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

used as insecticide?

A

CuSo4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

used in purification of water?

A

CuSo4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

used to detect glucose suger?

A

fehling solution changes from blue to orange

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

used as oxidizing agent?

A

K2Cr2O7, KMnO4 and MnO2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

used as an antiseptic?

A

KMnO4 and as an oxidizing agen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

added to steel?

A

Vanadium (car springs), Manganese ( railway tracks)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

added to Aluminum ?

A

scandium (Meg fighter jets). Titanium ( space shuttles and aircrafts). Manganese (soft drink cans)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

used in making dyes?

A

Vanadium pentaoxide and chromium 3 oxide. Cr2O3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

can be magnetized ?

A

Iron, cobalt and Nickel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

has 12 radioactive isotops?

A

cobalt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

used in food preserving process, in detection of cracks and welding connection?

A

cobalt 60 isotope.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

used in medicine?

A

Titanium and cobalt 60 isotope (in malignancy diagnosis and it’s treatment)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

it’s alloy with iron is hard, resist rusting and the effect of acid?

A

Nickel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

used in heating coils in electric furnaces?

A

Nickel-chromium alloy.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

the first discovered metal? it’s alloy with tin known as bronze alloy?

A

copper

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

used in cosmetics?

A

TiO2 and ZnO.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

used in paints, rubbers?

A

zno

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

used in illuminating paints and x-ray screens?

A

ZnS

36
Q

The energy required to excite the unpaired electron in d-sublevel =energy of?

A

visible light

37
Q

The fourth most abundant element in the earth’s crust?

A

Iron

38
Q

how many ores does the iron have?

A

4

39
Q

what are they?

A

Heamatite, Magnetite, limonite and sederite.

40
Q

Ore has blood red colour?

A

Heamatite

41
Q

ore has black colour? magnetic properties and high density?

A

Magnetic iron oxide ( Magnetite)

42
Q

Ore has yellow colour? and is reduced easily?

A

Limonite

43
Q

Ore had Yellowish grey colour and is easily reduced?

A

sederite

44
Q

The element which has the electronic configuration { Ar } , 3d10 , 4s2 is?

A

Zinc

45
Q

The maximum oxidation number of any transition element doesn’t exceed its group number , excluding group ………… elements

A

1B copper, silver and gold.

46
Q

four elements A , B , C , D element A has no colured compounds , the oxide of element B is used in the manufacture of dyes used in ceramics , element C is used in the manufacture of Mig fighter jets and element D is characterized by the highest oxidation number .

A

Zinc , vanadium , scandium , manganese

47
Q

Transition metals have high melting and boiling point , because of?

A

Forming strong metallic bonds

48
Q

Which metal is the most likely to be used in an electrical wiring?

A

cooper

49
Q

Iron is found in a free state in the?

A

Meteorites

50
Q

ore dressing stages?

A 
A) improving physical properties
1)crushing.
2) sintering.
3) purification and concentration process.
B) Improving chemical properties.
Roasting process
51
Q

stages of iron extraction?

A

1) Ore dressing.
2) reduction process.
3) Iron production.

52
Q

Siderite is roasted in air by heating to convert it to

A

heamatite

53
Q

What are the methods used to increase the percentage of iron in the purification and concentrating process?

A

surface tension
magnetic separation
electric separation

54
Q

The chemical formula of siderite ore is

A

FeCO3

55
Q

iron production process takes place in what furnaces?

A

The oxygen converter
The open hearth furnace
the electric furnace

56
Q

Water gas which is used in the reduction of iron oxides in the midrex furnace , resulting from

A

Methane

57
Q

iron is different from the rest of the elements which precede in the first transition series , because it?

A

it doesn’t reach the maximum oxidation state which corresponds to the removal of all electrons of 4s and 3d sublevel.

58
Q

Iron dissolved in dil acids giving?

A

Iron II salts

59
Q

On adding ammonia hydroxide solution to the product of the reaction between iron and chloride , a ………………. Ppt is formed

A

Reddish brown

60
Q

FeO reacts with dil. Acids to give

A

Iron II salt and water

61
Q

On heating iron III hydroxide above 200 c , …………….. is produced

A

Iron III oxide

62
Q

The passivity of iron conc. Nitric acid is due to the formation of a thin layer of ……………… on the metal surface

A

Oxide

63
Q

what is passivity?

A

formation of a non-porous oxide layer when concentrated nitric acid reacts with some metals like iron.

64
Q

an oxide used in red pigments in paints?

A

Iron 3 oxide Fe2O3

65
Q

Cementite alloy is one of Iron alloys

(i) White is the type of cementite alloy:…………………………………………………….
(ii) Why does not cementite chemical formula obey valence laws?

A

intermetallic alloy

66
Q

write an equation for a reaction catalyzed by the following substances
Fe, V2O5 (vanadium penta oxide.)

A

Fe used as a catalyst in the preparation of Ammonia gas by haber-boshc’s method.
Vanadium penta oxide used as a catalyst in the preparation of sulphuric acid.
S(g) + O2 → SO2(g) + Δ
2SO2(g) + O2(g) ⇌ SO3 (g) (this process is the one catalyzed by vanadium penta oxide).
SO3 (l) + H2O (l) → H2SO4 (aq)

67
Q

explain why cu+ is not coloured?

A

Because the orbitals of D sublevel in Cu+ are completely filled, so there is no single electron to be excited easily by the energy of visible light.

68
Q

why do transition elements form coloured ions?

A

Due to the precence of unpaired electrons in D-sublevel which can be excited easily by the energy of visible light, so the element absorbs the light whose energy equals the energy required to excite the unpaired electron in D sublevel and reflects the contemporary colour which is seen by the eye.

69
Q

why do transition elements form complex compound?

A

Because they have more than one oxidation state.

70
Q

Explain why Zn is not classified as transition element?

A

Because either in it’s atomic state or it’s only oxidation state +2, The orbitals or D sublevel are completely filled and this disobeys the general definition of the transition elements which states that for an element to be considered a transition element, it has to have a partially filled D-sublevel in either it’s atomic state or one of it’s oxidation states, thus Zinc is not considered a transition element.

71
Q

what are the only elements known to produce a magnetic field?

A

Fe, Co and Ni.

Iron, Cobalt and Nickel.

72
Q

how many preparation methods of FeO available?

A

2 methods.

1) By heating Iron2 oxalate aways from air.
2) By reducing higher oxides.

73
Q

how many methods are there to prepare Fe2O3?

A

2 methods.

1) By heating Iron 2 sulphate.
2) By adding Aqueos solution of Iron 3 chloride to Ammonium hydroxide then heating the resultant Iron 3 hydroxide.

74
Q

How many methods are there to prepare Fe3O4?

A

2 methods.

1) By passing hot air or steam on red hot iron.
2) By reducing Fe2O3 at a temperature of 230-300.

75
Q

reduction of Fe203 produces two different oxides, name them, and mention how to obtain them.

A

produces FeO (Iron 2 oxide) and Fe3O4 (Magnetic iron oxide)

1) Fe2O3 is reduced and heated under temperature of 400-700 degree to obtain FeO.
2) Fe2O3 is reduced and heated under temperature of 230-300 degree to obtain Fe3O4.

76
Q

FeO reacts with which acids to form which salts?

A

Reacts with Dil acids to form Iron 2 salts.

77
Q

Fe203 Reacts with which acid to form which salt?

A

Reacts with hot Conc. acids only to form Iron 3 salts.

78
Q

Fe2O3 is a mixture of how many oxides?

A

Is a mixture of 2 oxides, Feo and Fe2O3

79
Q

Fe3O4 reacts with which acids to form which salt?

A

reacts with hot conc. acids only to form both Iron 2 salts and Iron 3 salts and water.

80
Q

Iron reacts with hot conc. sulphuric acid to give what?

while Fe3O4 reacts with hot con. sulphuric acid to give what?

A

both of them give Iron 2, Iron 3 salts and water.

However, Fe gives So2 gas as well which has an irritating smell.

81
Q

Fe reacts with dil. acids to give what?
while FeO reacts with dil acids to give what?
what is the only difference between the two reactions?

A

both of them give the same salt.
The only difference is that fe+dil.acid gives hydrogen gas which burns with blue flame and a pop sound, while FeO+ dil.acid gives water.

82
Q

The common product among all the reactions of Iron oxides and acids wether they are dil or hot.con?

A

water is the common product among all the reactions of Iron oxides with acids.

83
Q

An oxide which is easily oxidized in air?

A

FeO

84
Q

A higher oxide when oxidized in air gives another high oxide?

A

Magnetic iron oxide, gives Fe2O3

85
Q

what happens when Fe id=s added to conc. Nitric acid?

A

No reasction occurs.

86
Q

what are the physcial properties of transition elements?

A

atomic mass, atomic size, metallic properties and Magnetic properties.

chemistry (chapter one) (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions