ICSE CHEMISTRY CLASS 10 PRACTICE PAPERS
PRACTICE PAPER-1
Electrolysis, HCl, Acids bases and salts,
Ammonia
SECTION
- I
Answer
All the following questions.
Question- 1
a) State whether
following statements are true or false.
i)
Ammonia
mixes with hydrogen chloride gas to produce dense white fumes.
ii)
Chlorine
turns moist starch iodide paper green.
iii)
Dry
hydrogen chloride gas is acidic in nature.
iv)
Hydrogen
chloride gas when dissolved in water produces hydrochloric acid.
v)
Reaction
of silver nitrate with hydrochloric acid produces a yellow precipitate.
b)
Match the following.
Eg: 6-(d).
i)
Sodium
argentocyanide ( ) a)
Inert electrode
ii)
Nitric
acid (
) b) Weak electrolyte.
iii)
Acetic
acid ( ) c)
Strong electrolyte.
iv)
Platinum ( ) d)
Non electrolyte.
v)
Silver ( ) e)
Complex salt.
vi)
Glucose ( ) f)
Active electrode.
c)
Fill in the blanks.
i)
Hygroscopic
substances are also called as___________.
ii)
Ammonium
hydroxide is a ___________ base.
iii)
PH
of pure water is________.
iv)
A
compound other than CO2 which turns lime water milky__________.
v)
Addition
of phenolphthalein (alkaline) to basic medium gives a___________colour.
d)
Complete the following table.
Metallic
salt solution
|
Colour
of ppt in little NH4OH
|
1)
Copper sulphate
|
|
2)
Iron(III)chloride
|
|
3)Iron(II)sulphate
|
|
4)
Lead nitrate
|
|
5)
Zinc nitrate
|
e)
Select the correct answer from the
choices given below:-
1) The acid
anhydride of sulphuricacid is
a)
Sulphurdioxide b) Sulphur trioxidec) Sulphur monochlorided) None of these.
2) In laboratory
coppersulphate is prepared by
a) Displacement
b) Synthesis c)Direct combination d) Decomposition.
3)Nitrogen
dioxide is a
a) Greenish
yellow coloured gas b) Colourless gas c) Reddish brown coloured gas d)Green
coloured gas.
4)During the
electrolysis of acidulated water the product at anode
a) Hydrogen gas b)
Nil c) Oxygen d) Both a and c.
5)Which of the
following is an inert electrode.
a) Iron b)
Nickel c) Silver d)Copper.
6)Ammonia gets
catalytically oxidized to
a) N2 +
H2O b) NO2 +
H2O c) NO+ H2O d)Cu
7)Drying agent
for ammonia.
a) CaO b) P2O5 c) Conc H2SO4 d)HCl
8) A Salt of
Silver which is soluble in excess of
ammonium hydroxide.
a) Silver
chloride b) Silver nitrate c) Silver nitrite d) Silver bromide.
9)The colour of
precipitate form on reaction of silver nitrate with hydrochloric acid.
a)Black b) Green
c) White d) Orange
10)Drying agent
used for drying the hydrogen chloride gas.
a) Conc H2SO4 b) P2O5 c) CaO
d) CaCl2 .
f)
Identify the following.
i)
A
greenish yellow gas which turns moist starch iodide paper blue black.
ii)
A
gas that turns lime water milky.
iii)
A
gas with rotten egg smell and turns lead acetate paper silvery black.
iv)
A
colourless gas which turns alkaline pyrogallol brown .
v)
It
turns potassium dichromate paper from orange to green.
g)
Name the following compounds.
1) MgCO3 2)
CH3COOH 3) K2Cr2O7 4) NH4NO3 5)
HCOOH
Question
2. (3+2+3+2)
a) Give reasons
1)solid
sodium chloride does not conduct
electricity.
2) Blue colour
of Aqueous copper sulphate fades using
platinium electrodes.
3) Graphite
anode is preferred during the electrolysis of molten lead bromide.
b) An electrode
A is connected to positive terminal of the battery while B is connected to
negative terminal .
1) Give the
names of A and B.
2) Which
electrode is oxidizing electrode.
c) A metal
article is to be electroplated with silver. The electrolyte selected is sodium
argentocyanide.
1) What kind of
salt is sodium argento cyanide.
2) Why it is
preferred to silver nitrate.
3) Write the
reaction taking place at anode.
4) Name the
following :
1) A solution of
this compound id used as the electrolyte when copper is purified.
2) When this
compound is electrolysed in molten state lead is obtained at cathode.
Question 3
(4+3+3)
a) How can you
obtain the following gases by using dilute acid and one another substance.
1) Hydrogen.
2)
Carbondioxide.
3) Sulphur
dioxide.
4) Hydrogen
sulphide.
b) Give one
example for each of the following.
1) Acid salt.
2) Normal salt.
3) Basic salt.
c) Name the
following.
1) A acid when
dissolved in water produces an ion as the only positively charged ion.
2) A base when
dissolved in water produces an ion as the only negatively charged ion.
3) A compound
which reacts with acid to form salt and water.
Question
4. (5+3+2)
a) What are the
colour of the precipitates when ammonium hydroxide is added to the following
solutions in in little.
1)
Iron(II)chloride.
2)
Iron(III)chloride.
3) lead nitrate.
4) Zinc nitrate.
5) copper
nitrate.
b)
State your observations.
1)
Hydrogensulphide on reaction with lead acetate.
2)Reaction
of Nesslers reagent with ammonia.
3)
Reaction of sodium carbonate with barium chloride.
c)
Compound ‘A’ on reaction with dil hydrochloric acid produces a colourless,
odourless gas’B’ with brisk effervescence.
1) Identify ‘B’.
2) Identify
anion in compound ‘A’.
Question
5. (4+4+2).
a)
In the industrial preparation of ammonia state the following.
1)
Name the catalyst.
2)
Promotor used.
3)
The source of hydrogen gas.
4)
Optimum temperature.
b)
Balance the following word equations.
1) Reaction of
magnesium nitride with water.
2) Reaction of
ammonium sulphate with caustic soda.
3) Catalytic
oxidation of ammonia.
4) Reaction of
ammonia with dil sulphuric acid.
c)
State two conclusions of fountain experiment usin dry ammonia.
Question
6. (4+4+2)
a)
Name the gas evolved when dil hydrochlo;ric acid is added to
1) Magnesium.
2)
Calciumcarbonate.
3) Zinc
sulphide.
4)
Magnesium(IV)oxide.
b)
Name the following.
1) Solvent for
nobel metal.
2) The gas
evolved when rock salt reacts with conc sulphuric acid.
3) Dryoing agent
for hydrogen chloride gas.
4) Drying agent
not used.
c)
By adding only one solution how wouls you distinguish between dil hydrochlo;ric
acid and dil nitric acid.
Question
7. (4+4+2)
a)
Balance the following equations.
1)
MnO2 + HCl à MnCl2 + Cl2 +
H2O.
2)
CaO + HCl à CaCl2 +
H2O.
3)
HCl +HNO3 à NOCl +[Cl]+ H2O.
4)
S + HNO3àH2SO4
+ H2O+NO2.
b)
Identify the acidity and basicity of following.
1)
H2SO4.
2)
NaOH.
3)
HCl.
4)
NH4OH.
c)
Name the following .
1) NH4+.
2) OH-.
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