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WorksheetsInorganic chemistry
Total questions: 40
Worksheet time: 24mins
X and Y are elements of the third period.
X and Y are individually heated in excess chlorine. Each product is purified and then separately added to water, producing two solutions. Both solutions have a pH of less than 5. What could be X and Y
Na and P
Mg and Al
Mg and Si
Si and P
An ore contains magnesium carbonate and barium carbonate. A sample of the ore is dissolved in nitric acid.
How could this solution be processed into a magnesium compound and a separate barium compound?
Add HCl (aq), filter off the solid barium chloride.
Add HCl (aq), filter off the solid magnesium chloride.
Add H2SO4 (aq), filter off the solid barium sulphate.
Add H2SO4 (aq), filter off the solid magnesium sulphate.
When calcium and calcium hydride, CaH2, react separately with water, they each produce a white solid and a colourless gas. The white solid is the same compound in each reaction.
Which statement is correct?
Both Ca and CaH2 produce H2.
Both Ca and CaH2 produce O2.
Ca produces H2 and CaH2 produce O2.
Ca produces O2 and CaH2 produce H2.
When concentrated sulfuric acid is added to solid sodium chloride, HCl is formed but not Cl2.
When concentrated sulfuric acid is added to solid sodium iodide, I2 is formed. Which statement explains these observations?
Sulfuric acid is an oxidising agent and chloride ions are more easily oxidized.
Sulfuric acid is an oxidising agent and iodide ions are more easily oxidized.
Sulfuric acid is a reducing agent and chloride ions are more easily reduced.
Sulfuric acid is a reducing agent and iodide ions are more easily reduced.
The gaseous products of heating a mixture of Ca(OH)2 and NH4Cl are passed through solid CaO. This absorbs water vapour and a gas, W, is collected.
A sample of W is oxidized by Cl2(g) to produce two gases, X and Y. X is an element. Y is acidic. Y reacts with W to produce Z. What are X and Z?
X is N2 , Z is CaCl2
X is N2 , Z is NH4Cl
X is O2 , Z is CaCl2
X is O2 , Z is NH4Cl
Magnesium chloride, MgCl2, and silicon tetrachloride, SiCl4, are separately added to water. What are the approximate pH values of the solutions formed?
MgCl2 : 0-3 SiCl4 : 0-3
MgCl2 : 0-3 SiCl4 : 6-7
MgCl2 : 6-7 SiCl4 : 0-3
MgCl2 : 6-7 SiCl4 : 6-7
Ammonia exists as simple covalent molecules, NH3. Ammonia can react with suitable reagents to form products containing ammonium ions NH4+. Ammonia can also react with suitable reagents to form products containing amide ions, NH2-. Which of these nitrogen-containing species are present in an aqueous solution of ammonia?
ammonia molecules and amides ions only
ammonia molecules and ammonium ions only
ammonia molecules only
ammonium ions only
What would be produced when 60g of NO react with an excess of CO in a catalytic converter?
12 g of C and 92 g of NO2
24 g of C and 92 g of NO2
88 g of CO2 and 28 g of N2
88 g of CO2 and 56 g of N2
The total number of lone pairs in I3- ion
3
6
9
12
7
The decrease in the ionic radius from P3- to Cl- is caused by
the increase in nuclear charge and increase in the number of electrons
the increase in nuclear charge while the electrons remains constant
the increase in the number of electrons while the nuclear charge remains constant
the decrease in the number of electrons while the nuclear charge remains constant
The following uses of the elements are correct except for
CaO - Spread on agricultural land to neutralise excess basicity
CaSO4- Used as plaster for broken limbs
Mg- Used in aircraft as it has lightweight and low density
NaOH- Used in the manufacture of soaps
Alkaline earth metals P and Q have 4 shells and 5 shells respectively. Choose correct statement about P and Q.
P has a larger atomic radius than Q
P has a higher ionisation energy than Q
P is more reactive than Q
P is a better conductor than Q
The tendency to lose their valance electron easily by alkali metals makes them
strong reducing agent
weak reducing agent
strong oxidising agent
weak oxidising agent
Ammonia is liquid phosphene gas . Why?
Due to more molar mass ammonia has maximum vanderwall force of attraction
Due to more molar mass , ammonia has less vander wall force of attraction
Due to presence of inter molecular hydrogen bonding in ammonia
Due to absence of hydrogen bonding in ammonia
Nitrogen cannot exhibit co valancy more than four due to
Presence of vacant d orbitals
Due to large size
Due to absence of vacant d orbitals
Due to inert nature
Among the hydrides of 15th group , which is strong reducing agent?
Ammonia
Phosphine
Arsine
Bismuthine
- XeF6 on complete hydrolysis produces
XeOF 4
XeO2F 2
Xe O 3
Xe O 2
4.Which of the following is strongest acid among all ?
HI
HF
HBr
HCl
The oxidation number of I in HIO 4
+4
+3
+ 7
+ 5
Pick out the correct statement
Chlorine water on standing loses its yellow colour due to the formation of HBr
Bleaching property of chlorine is due to the formation of nascent oxygen
Chlorine converts SO2 to SO3
The bleaching effect of chlorine is temporary.
Sulphur in the vapour state is diamagnetic.
True
False
Which of the following options are not in accordance with the property
mentioned against them?
(i) F2 > Cl2 > Br2 > I2 Oxidising power.
(ii) MI < MBr < MCl < MF Ionic character of metal halide.
(iii) F2 > Cl2 > Br2 > I2 Bond dissociation enthalpy.
(iv) HI < HBr < HCl < HF Bond dissociation enthalpy.
Assertion : N2 is less reactive than P4.
Reason : Nitrogen has more electron gain enthalpy than phosphorus
Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
Assertion is correct, but reason is wrong statement.
Assertion is wrong but reason is correct statement.
Both assertion and reason are wrong statement
SF6 is known but SCl6 is not________
Due to small size of fluorine six F – ion can be accomodated around sulphur whereas chloride ion is comparatively larger in size, therefore, there will be interionic repulsion
Due to absence of vacant d orbital
Chlorine have more electron gain enthalpy than
none of these
What is the oxidation number of Oxygen in OF2?
+2
0
+1
-2
Correct order of boiling point is
H2O < H2S < H2Se < H2Te
H2O < H2Se < H2Te < H2S
H2Te < H2O < H2S < H2Se
H2S < H2Se < H2Te < H2O
The molecular shape of SF4 is
square planar
see-saw
tetrahedral
bent 'T' shape
The inert pair effect increase when
Across the period
Going down the group
Don"t no the answer
H2S is less acidic than H2Te because
H-Te bond dissociation enthalpy is less than that of H-S
H2S undergoes hydrogen bonding
H2Te undergoes hydrogen bonding
H-Te bond dissociation enthalpy is greater than that of H-S
O3 acts as a powerful oxidising agent because
ozone is thermodynamically unstable
its decomposition into oxygen results in the liberation of heat
it liberates atoms of nascent oxygen
(O3 → O2 + O)
ozone has a characteristic smell
In O3 the O-O-O bond angle is about
1170
1800
900
109.50
SO2 + MnO4- + H2O → ?
SO42- + Mn2+ + H+
SO42- + MnO2 + H+
SO32- + Mn2+ + H+
SO3 + Mn2+ + H+
S-O-O-S bond is present in
H2S2O7
H2S2O8
H2S2O3
H2SO4
Which four numbers a, b, c and d are required to balance the equation?
a Cl2(aq) + b KI(aq) ==> c KCl(aq) + d I2(aq)
2 1 1 2
1 2 2 1
2 1 2 1
1 2 1 2
which property of halogens increases from fluorine to iodine
electronegativity of elements
oxidizing power of elements
bond length in the halogen molecule
First ionization energy
The given table shows the results obtained when the halogens X2, Y2 and Z2 were added to separate aqueous solutions containing X-, Y- and Z-. which set correctly shows the strength (strongest first) of the ions X-, Y- and Z- as reducing agents?
X- Y- , Z-
X-, Z-, Y-
Y-, Z-, X-
Z-, X-, Y-,
The oxidising action of nitric acid can be shown by the reaction of nitric acid with
calcium
sodium
copper
magnesium
When ammonia solution is reacted with copper (II) salts in excess , the colour obtained is
deep blue
brown
green
blue
A suitable drying agent to collect ammonia is
concentrated sulfuric acid
calcium oxide
calcium chloride
calcium sulfate
