Deep CLASSES (SCIENCE AND TECHNOLOGY)—STD X (MARKS-50 TIME :1 ½ HOUR)
1)
Antimony is a _______________.
2) Pencil lead is a form of ______________.
3) Metals are solids at room temperature except ____________ and
______________.
4) Metals can be polished to give a highly ____________ surface.
5) One gram of gold can be drawn into a wire of _________cm in length.
6) Gold and __________ are the most ductile metals.
7) Silver and ___________ are the best conductors of heat.
8) __________ and Mecury are poor conductors of heat.
9) Electric wires are made of ____________.
10)Metals like sodium
and ______________ are soft metals.
11)The only non-metal in
liquid state is _____________.
12)Non-metals do not
have luster except ________ and _________.
13)The only non-metal
possessing the property of hardness is ___________ in the form of
_______________.
14)The only non-metal
which conduct electricity is _____________,an allotrope of ______________.
15)____________and
_______________ are most reactive metals.
16)Sodium metal is
stored in _________________oil.
17) 4Na + O2 → ______________.
( sodium metal ) (oxygen) (_______________)
18)Magnesium do not
react with ___________at room temperature.
19)Zinc burns in air on
strong heating to form _________________________.
20) Iron filings burn
vigorously when sprinkled in flame of burner to form a compound having formula
__________.
21)The metal Copper on
heating gets coated with _________ colured layer of _________________.
22)The compound
___________________ formed in process of anodising the Al makes it resistant to
corrosion.
23)In the process of
anodising the Al ,the electrolyte used is dilute
_______________________________.
24)The anode
reaction in process of Al-anodising
results in formation of black coloured _________film of Al2O3.
25)Zinc oxide is an
_________________ oxide.
26)The molecular formula
of sodium aluminate is ______________.
27)Alumina and
hydrochloric acid react to form 3 molecules of water and 2 molecules another
compound having molecular formula _______________.
28)Potassium react with
__________ water to form potassium hydroxide with evolution of __________ gas.
29)When Calcium is
reacted with water we get compound named ___________________with evolution of H2 gas.
30)
___________ +
_________ → Fe3O4 +
4H2
( iron ) (steam)
31)Metals
like _____________,________________ and Copper do not react with water at all.
32)The
alloy of copper and zinc is _______________.
33)Stainless
steel is an alloy comprising of Fe,Ni and _______________.
34)The
rate of fast formation of bubbles of hydrogen gas when the metals Zn,Fe,Mg and
Al are reacted with HCl is in order relation :____
>____ >____ >______.
35)Metals react with __________________________to form metal sulphate
and H2 gas.
36)In
general,___________gas is not evolved when metal reacts wih nitric acid .
37)PVC is bad conductor of ________________.
38)Electric wires have coating of
_______________________________________.
39) __________ + H2O → 2NaOH
( ________________ )
(water) (sodium hydroxide)
40) 2Na + O2 ________ 2MgO
( magnesium )
(oxygen) (magnesium oxide)
41) Kitchen articles,pressure cookers and sliding windows are
applications of ________________techniques.
42) 2Na + 2H2O →
2NaOH + H2 + ______________________
( sodium )
(water) (sodium
hydroxide)
43)Magnesium reacts with
___________water to form magnesium hydroxide and hydrogen.
44)Bronze is an alloy of _________and
_____________.
45)If one of metals in an alloy is
____________ then the alloy is known as _______________.
46)Noble gases are chemically
________________.
47)Chlorine is a poisonous gas with
______________________colour.
48)Sodium is a soft metal with _____________colour.
49)____________ gas is used in World War I.
50)Sodium Chloride is a safe compound which is called
as ___________________________.
51)If sodium atom loses 1 electron from its ‘M’shell
then its ____shell acquire a stable octet.
52)By loss of a electron from sodium atom there is net
positive charge giving us a ________________.
53)After gaining a electron ,chlorine altogether has
18 electrons but has _____ protons which leads to formation of
_____________________.
54)Ionic bond is also called as _________________bond.
55)The oppositely charged sodium and chloride are held
by strong ___________________forces of attraction to exist as NaCl molecule.
56)The compounds formed by transfer of electrons from
__________ to ___________ are called as ionic compounds.
57)Ammonia is an example of _________________compound
.
58)Ionic compounds are insoluble in solvents such as
_____________,___________,etc.
59)Conduction of electricity through a solution involves movement of
_____________particles.
60)A solution of an ionic compound in water contains
ions which move to ___________electrodes when electricity is passes through the
solution .
61)Ionic compounds do not conduct electricity in solid
state but conduct electricity in _____________state.
62)The naturally occurring compounds of metals along
with their ______________are called as minerals.
63)The minerals from which metals are
_______________and ___________________extracted are called as ores.
64)________contain metal compounds with some of
impurities like soil,sand,rocky material,etc.These impurities are called as
_______________.
65)The process used for extraction of metals in their
pure form from their ores is called as ________________.
66)The _______________________of metals in decreasing
order of reactivity in the form of series
is called as reactivity series of metals.
67)The least reactive metal is
_______________.
68)The metals high up in the reactivity
series are obtained by process of ________________________________.
69)Na,Ca and Mg are obtained by
electrolysis of their molten ________________________.
70)In process of electrolytic reduction
_____________________is liberated at anode.
71)The positively charged electrode is
called as ____________.
72)The colour of Al is
______________________________.
73)The formula for bauxite is
______________________________.
74)The formula for fluorspar is
______________________________.
75)The formula for cryolite is
______________________________.
76)The formula for alumina is
______________________________.
77)The formula for caustic soda is
______________________________.
78)The formula for sodium aluminate is
______________________________.
79)The formula for silica is
______________________________.
80)The formula for iron oxide is
______________________________.
81)The formula for Aluminium hydroxide is
______________________________.
82)The ore of Aluminium is converted to
___________________by Bayer’s process.
83)Bauxite is crushed with NaOH solution at
_______ to _______ᵒC in tank called
digestor.
84)Sodium silicate is __________________in
water.
85)Sodium aluminate is diluted with water
and cooled to ________ᵒC to give a
precipitate.
86)
2Al(OH)3 _________________________ Al2O3 + 3H2O
87) In
electrolytic reduction process ,the reaction at anode is : 2Cl - → _______ +
_______
(chlorine gas)
88)The melting
point of molten mixture of pure aluminium oxide is above _________ᵒC.
89) In
electrolytic reduction process of alumina ,the reaction at cathode is : _______ + _______ →
Al
90)It is easier
to obtain metal from its oxide as compared to its ________________and
___________________.
91)The
_______________ores converted to oxides by process roasting.
92)In process of
calcination heating is carried out strongly in _______________supply of air.
93)The name of
compound HgO is ___________________________.
94) ____________ +
4Al → 3Mn + 2Al2O3 + ___________
( manganese)
95)In thermit
reaction , two more elements other than Al are _______and ___________.
96)Corrosion is
___________________of materials due reaction with environment.
97)Copper reacts
CO2 in air to get _____________ coloured coat of Copper carbonate.
98)The process of
coating with Zn,Fe or steel is called as _________________________.
99) The process
of coating with Sn is called as _________________________.
100)Electroplating
is a process in which metal is covered with another metal using
_____________________.
1.
metalloid
2.
graphite
3.
Hg and Ga
4.
polished
5.
20000
6.
silver
7.
copper
8.
lead
9.
copper
10.
K
11.
Br
12.
iodine and diamond
13.
C , diamond
14.
graphite ,carbon
15.
K,Na
16.
kerosene
17.
2Na2O,sodium oxide
18.
oxygen
19.
zinc oxide
20.
Fe3O4
21.
black,copper oxide
22.
aluminium oxide
23.
sulphuric acid
24.
thin,
25.
amphoteric
26.
NaAlO2
27.
AlCl3
28.
cold,H2
29.
calcium hydroxide
30.
3Fe,4H2O
31.
gold,silver
32.
brass
33.
Cr
34.
Mg,Al,Zn,Fe
35.
dilute hydrochloric acid
36.
hydrogen
37.
electricity
38.
PVC
39.
Na2O,sodium oxide
40.
heat→
41.
anodizing
42.
heat energy
43.
hot
44.
copper and tin
45.
amalgam
46.
inactive
47.
greenish yellow
48.
silver
49.
chlorine
50.
common table salt
51.
L
52.
Sodium cation
53.
17.chloride anion
54.
Electrovalent
55.
electrostatic
56.
netal ,non-metal
57.
covalent
58.
petrol,kerosene
59.
charged
60.
opposite
61.
molten
62.
impurities
63.
profitably and conveniently
64.
ores
65.
metallurgy
66.
arrangement
67.
gold
68.
electrolytic reduction
69.
chlorides
70.
chlorine
71.
anode
72.
silvery white
73.
Al2O3.H2O
74.
CaF2
75.
AlF3,3NaF
76.
Al2O3
77.
NaOH
78.
NaAlO2
79.
SiO2
80.
Fe2O3
81.
Al(OH)3
82.
Alumina
83.
140,150
84.
Soluble
85.
50
86.
Heat,→,1000
C
C
87.
Cl2,2e-
88.
2000ᵒC
89.
Al3+,3e-
90.
Sulphides ,carbonates
91.
Sulphide
92.
Limited
93.
Mercuric
oxide
94.
3MnO2,heat
95.
O,Fe
96.
Degradation.
97.
Green
98.
Galvanizing
99.
Tinning
100)electrolysis
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