Deep CLASSES
1.
When reactants are permanently
converted into new products ,___________change takes place.
2.
The molecular formula of
potassium dichromate is _____________.
3.
The molecular formula of
tricalcium aluminate is _____________.
4.
Each activity with chemical
change results in a chemical reaction
,which is represented by a chemical _________________.
5.
The simple form of
_______________________ of chemical reaction in words is known as
word-equation.
6.
During the reaction, the
substances that undergo change are called __________________.
7.
The arrow represents the
__________________of the reaction.
8.
When vegetable oil is heated
with H2 gas and Ni powder we get fats on ____________.
9.
If the number of atoms of each element on both
reactant and product side is not balanced ,it is due to ____________ mass of
atoms on both sides.
10.
The molecular formula of
concrete is _____________.
11.
C12H22O11__
+ H2O____ ____________________________ C6H12O6 +
C6H12O6
12.
n(H2C=CH2)___________________________ (-H2C-CH2-)n
(________)
(________)
13.
The arrow represents the __________________of
the reaction.
14.
The molecular formula of POP is
_____________.
15.
The molecular formula of gypsum
is _____________.
16.
When NaOH(s)
dissolves in water ,there is _____________ of heat.
17.
The name of KNO3 is
__________________________________.
18.
C12H22O11(s) __________
12C(s) + __________(g) is an example of
decomposition reaction.
(sugar)
19.The temperature 1000ᵒC =
________K.
20. The
__________________________colour of silver bromide turns grey when exposed to
sunlight.
21.CaS(s) + ________ → CaCl2(s) + H2S(g) is an example of decomposition reaction
brought about by acids.
22.The name of compound CuI2 is
______________________________.
23. AgNO3 + NaCl → ___________ + NaNO3
(silver (sodium
(sodium
nitrate) chloride) nitrate)
24.Precipitate of Barium sulphate is formed by exchange of ions
______and _______between the reactants.
25. 2C2H5OH(l) + 2Na → ____________________ + ____________
(ethyl
alcohol) (metallic sodium)
(____________________)
(________________)
26. O3 ______________ O2 + ____________
(ozone) (oxygen) (____________________)
(ozone) (oxygen) (____________________)
27. Fe2O3.H2O
is a chemical formula of _______________.
28.The slow process of decay or
_________________ of metal due effect of air,moisture and acids on it known as
corrosion.
29.
When left over edible is heated ,it starts __________________up.
30.When oil and fats are allowed to stand
for a long time, they become ______________.
31.Storage
of food in ________________ containers retards oxidation.
32.______________________ are used to
prevent oxidation of food containing fats and oils.
33.The yellow oily left over stains turns
_________________________ because of neutralisation.
34.Edible oils are
_______________compounds.
35.Edible oils are compounds of
________________and carboxylic acids.
36.The esters of carboxylic acids in edible
oil are ______________________by soaps/detergents.
37.The neutralisation reaction is indicated
by ______________(yellow) which turns red.
37.The neutralisation reaction is indicated
by ______________(yellow) which turns red.
38.When a small
piece of aluminium wire is burnt we get a compound called
_______________________________.
39.If a
small piece of tungsten wire which is removed from a fused bulb and is tried to
ignite, then it is not possible to ignite it because _____________________of
tungsten wire is much higher than that of flame.
40. The precipitate of barium chromate is of
________________ colour.
41.The
H2S gas has smell of ________________________.
42.When
camphor is heated ,it _______________and when apparatus is cooled camphor
vapour _______________.
43.If a used paper is burned ,then it is observed that ,initial weight of paper is
_________ than final weight of paper.
44.When
water is added to detergent ,its temperature _____________________.
45.When
5gm of NaOH and 5gm of KNO3 is added to bottle A and bottle B respectively ,each
filled with 100ml of distilled water , then temperature of solution in bottle
______increases and temperature of solution in bottle _____ decreases.
46.___________________ + 6O2(g) → 6CO2(g) + 6H2O(l) +
_______________
(___________________) (___________) (________________) (______)
47.During
digestion ,carbohydrates are broken into __________________.
48.While
making brown sugar for pudding, a black mass of ___________ is obtained instead
of brown due to burning.
49.When
pale yellow silver bromide is placed on watch glass kept in sunlight then its
colour changes to ____________.
50.Paste
of substance A is used to decorate roof of houses and if substance A is reacted
with water we get substance B, then name of substance A and B are
________________and ________________.
51.It
is not possible to __________________ pure water by heat or light energy.
52.If a metal W is inserted in CuSO4
solution then metal turns grey in colour, hence metal W is ___________.
53.When copper
chloride and potassium iodide are mixed in same quantity then
___________coloured precipitate is formed.
54. K2CrO4 + BaSO4 → ____________________ + K2SO4
(____________________) (barium sulphate) (______________________) (potassium sulphate)
55.____________ +
5O2 → P4O10 (reaction carried in presence of heat)
56. 3Mg + N2 →
___________________ (reaction carried in presence of heat)
57.When copper
articles are exposed to ____________and _______________ they form compounds CuO
and CuCO3 respectively.
58.The formula for
silver sulphide is ___________________.
59.When
________________________________are boiled in dull aluminium utensils ,alumina
is reduced to Al and utensils regain their original shine.
60.The full form
of BHA is ________________________________________________.
61.The full form
of BHT is ________________________________________________.
62.β-carotene and lycopene are examples of natural
__________________________.
63.Reactants react to form products which in turn is able to form
original substance is called as ______________________.
64.The full form of NCERT is
_____________________________________________________________________________.
65. The full form of NEERI is
____________________________________________________________________________.
66.In formation of fats from vegetable oil , nickel powder acts as a
________________.
67.The (l),(g) and (s) are examples of
________________________ of reactants and products that are to be mentioned in
the chemical equation.
68.While equalising the number of atoms in balancing process,we
cannot change the _________________of reactants or products.
69. BaCl2 + H2SO4 → __________________ +
__________________
(barium chloride) (sulphuric acid) (barium
sulphate) (hydrogen
chloride)
70. Zn__ +
2HCl__ → ZnCl2___ +
H2___
71. AgNO3___ +
NaCl__ → AgCl____ +
NaNO3____
72.
Chemical reactions involves ____________and making of bonds between atoms to
produce new substances.
73.
When two or more substances combine to form single product, then the reaction
is called as ____________________
reaction.
74.
The formula for carbonic acid is ________________.
75.
Increase in formation of CO2 leads to formation of
__________________________when it mixes with water vapour.
76.
At construction site, wet cement and _________________sets into concrete which
imparts strength to the building.
77.
The organic wastes are decomposed into _____________ and biogas.
78.When
a more reactive element remove another element, having less reactivity ,from
its compound ,these reactions are
termed
as ____________________________reactions.
79.
Chemical reactions in which reactants gain hydrogen are _________________
reactions.
80.
When H2 gas is passed over black copper oxide, pinkish brown coating
of ______________ is obtained.
1.
Chemical
2.
K2CrO4
3.
3 CaO.Al2O3
4.
Equation
5.
Representation
6.
Reactants
7.
Direction
8.
Cooling
9.
Unequal
10.
3CaO.Al2O3.6H2O
11.
(s),(aq),conc.HCl→323K,alcoholic
12.
Ethylene,high temp.,high
pressure,(Δ),polyethylene
13.
Direction
14.
2CasO4.H2O
15.
2CaSO4.4H2O
16.
Evolution
17.
Potassium nitrate
18.
Δ→11H2O
19.
1273
20.
Pale yellow
21.2HCl(l)
22.cuppric oxide
23.AgCl(s)↓,NaNO3,
silver chloride(precipitate), sodium nitrate
24.Ba++,SO4--
25. 2C2H5ONa,H2↑,sodium ethoxide ,hydrogen gas
26.Δ→light,[O],nascent oxygen
27.rust
28.destruction
29.frothing
30.rancid
31.air tight
32.antioxidants
33.red/orange
34.organic
35.alcohols
36.neutralised
37.turmeric
38.aluminium
oxide/alumina
39.melting point
40.yellow
41.rotten eggs
42.sublimes,condenses
43.more
44.increases
45.A,B
46.C6H12O6(aq),energy,glucose,oxygen,carbon
dioxide,water
47.glucose
48.carbon
49.grey
50.POP,Gypsum
51.decomposes
52.zinc
53.brown
54.BaCrO4 ,potassium chromate,barium chromate
55. P4
56. Mg3N2
57. light,moisture
58. Ag2S
59. leafy
vegetables
60. butylated
hydroxyl anisole
61. . butylated
hydroxyl toluene
62. antioxidants
63. temporary
change
64. National
Council of Educational and Research and Training
65.National
Environmental and Engineering Research Institute
66.catalyst
67.physical
states
69.BaSO4,2HCl
70.(s),(l),(s),(g)
71.(),(s),(s),()
72.breaking
73.combination
74.H2CO3
75.acid rains
76.gravel and
sand
77.manure
78.displacement
79.reduction
80. copper
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