CHAPTER # 2 S-Block Elements MCQ's
1. The
oxides of beryllium are.
(A) Acidic (B) Basic
(C)
Ba+2 (D)
Mg+2
2.
Which
ion will have the maximum value of heat of hydration?
(A)
Na+
(B) Cs+
(C)
Ba+2
(D) Mg+2
3. Which
one of the following is not an alkali metal?
(A)
Sodium sulphate B) Potassium
sulphate
(C)
Zinc sulphate D) Barium
sulphate
4. The
element cesium bears resemblance with.
(A)
Ca (B) Cr
(C)
Both of the above (D) None of the
above
5. Chile
saltpeter had the chemical formula
(A)
NaNO3 (B)
KNO3
(C)
Na2B4O7 (D) Na2CO3H2O
6. The
ore CaSO42H2O has the general name.
(A)
Gypsum (B)
Dolomite
(C)
Calcite (D)
Epsom salt
7. Down's
cell is used to prepare.
(A)
Sodium carbonate
(B)
Sodium bicarbonate
(C)
Sodium metal
(D)
Sodium hydroxide
8. Which
element is deposited at the cathode during the electrolysis of brine in
Nelson's cell?
(A) H2 (B) Na
(C)
CI2
(D) O2
9. Ionic
radius of potassium is.
(A) 60 pm (B) 133 pm
(C)
99 pm (D) 169
pm
B
10. Among
alkaline Earth Metals, the highest heat
of hydration is of.
(A)
Be (B)
Sr
(C)
Rb (D)
Cs
11. The
chemical formula of sylvite is.
(A)
Na2CO3. H2O (B) KCI
(C)
KCI. MgCL2. 6H2O
(D) NaCI
12. The
chemical formula of Alumite (Alum stone)
is.
(A)
KCI. MgCI2. 6H2O
(B)
KCI
(C)
Na2B4O7.
10H2O
(D)
K2SO4
Al(SO4)3. 2Al(OH)3
13. Among
alkali metals the lowest atomic number
is of.
(A)
Rb (B) K
(C)
Sr (D)
Li
14. Due
to the high reactivity nature of the alkali
metals, they are found in.
(A)
Free in nature
(B)
Bounded with other elements
(C)
Not free in nature
(D)
All of the above
15. Magnesium
is an essential constituent of.
(A)
Storaata (B) Plants
(C)
ChlorophyII (C) None of the
above
16. Which
of the alkali earth metal has radioactive
nature.
(A)
Be (B) Rb
(C)
Both of the above (D) Na
17. Calcium
Phosphate Ca3 (PO4) and calcium
fluoride CaF2 are essential part of
living organisms.
(A) Bones, egg shells (B) teeth
(C)
Sea-shells (D) All of
the above
18. Dolomite
is a compound of which elements.
(A)
Be
(B) Mg
(C)
Ca
(D) Ba
19. The melting point and boiling point of
which alkaline earth metal is high.
(A) Sr (B) Mg
(C)
Be
(D) Na
20. The
super oxides are formed by the elements.
(A)
K, Rb, Cs (B) K, Na, Cs,
(C)
K, Li, Na (D) None of
the above
21. Potassium,
rubidium and caeslium are so highly reactive that they react with
ice even at .
(A)
-100OC
(B) -200OC
(C)
-50oC (D) -0oC
22. Among
the alkaline earth metal which has least reactivity even upto 800oC
(A)
Ba (B) Cs
(C)
Li (D) Be
23. Plaster
of paris is formed after heating upto
100OC
(A)
Mg(NO3)2 (B)
CaSO4, 2H2O(gypsum)
(C)
NaNO2 (D) LiNO3
24. The
root system of several plants have been
greatly enlarged by the
application of.
A)
Sulphur B) Gypsum
C)
Both of the above D) None of the above
25.
When deficiency of calcium exists various substances are accumulated in plants
in harmful concentration which are.
(A)
Lime
(B)
Aluminium
(C)
Aliminium and Manganese
(D)
None of the above
26. Which
alkali metal behave different by from others?
(A)
Mg
(B) Na
(C)
Rb
(D) Li
27.
Spodumene, petalite, halite,
natron, alinite are the
common minerals of.
A)
Alkali metals B) Alkaline earth
metals
C)
Both of the above D) Li
28. Sodium
is prepared by the electrolysis of.
(A)
Simple NaCI in Down,s
cell
(B)
Molten NaCI in Down,s cell
(C)
Molten sodium hydroxide in
down's cell
(D)
None of the above
29. Lime
is used in.
(A)
Glass industry
(B)
Glass and paper industries
(C)
Paper industries
(D)
None of the above
30. The
elements which are very abundant in earth crust are__________
a)
Si & Aℓ b)
Ca & Mg
c)
B & Aℓ d)
All
31. The
oxides of Be are ___________
a)
Acidic b)
Basic
c)
Amphoteric d) None
32. Carbonates
of lithium are not stable like that of
sodium
due to _____
a)
Low electronegativity
b)
Low electropositivity
c)
Low charge density
d)
Not know yet
33. Which
one of the following is not an alkali metal?
a)
Francium b)
Caesium
c)
Rubidium d)
Radium
34. Which
of the following sulphates is not soluble
in water?
a)
Sodium sulphate b) Potassium
sulphate
c)
Zinc sulphate d) Barium sulphate
35. The ore CaSO4.2H2O
has the general
name____
a)
Gypsum b)
Dolomite
c)
Sodium metal d) Sodium
hydroxide
36. Crystals
of Na2CO3. 10H2O when exposed to air,
_______
a)
Lose water and remain solid
b)
Gain water and remain solid
c)
Gain water and become
liquid
d)
Remains unchanged.
37. The deliquescence is a process in which
a
solid________
a)
Absorbs moisture and
remains solid
b)
Absorbs moisture and turns
to liquid form
c)
Loses water of
crystallization
d)
Increases the number of
water of
crystallization
38.
In diaphragm cell, level of
brine in anode
compartment is kept slightly higher
which prevents_________
a) Hydroxide ions to reach anode
b) Chlorine gas to mix
c) Anode to decay
d) All
39.
Alkali metals form bonds
a) Ionic
b) Covalent
c)
Metallic d) Co-ordinate covalent
40.
The alkali metals, which
have radioactive isotopes
a) Li b)
Na
c) K d)
K and Rb
41.
Halite is the mineral
of
a) Sodium b)
Potassium
c)
Lithium d)
Cesium
42.
Na2SO3.10H2O
is the mineral of sodium and is called
a) Spodumene b) Halite
c)
Natron d)
Sylvite
43.
Which one of the following
is dolomite?
a) MgCO3 b)
MgCO3.CaCO3
c)
CaCO3 d)
BaSO4
44.
The high electrical
conductivity of alkali metals is due to the
a) Free motion of valence electrons
b) High I.P
c) Lesser atomic radii
d) None of these
45.
Sodium imparts color to
Bunsen flame
a) Green b)
Violet
c)
Blue d)
Yellow
46.
All alkaline earth metals
are white except
a) Mg b) Ca
c) Be
d)
Sr
47.
Metals, which are higher
that water, are
a) Alkaline earth metals
b) Coinage metals
c) Alkali metals
d) All of these
48.
Except lithium, the
hydroxides of all alkali metals are
a) Strongly acidic b)
Strongly basic
c)
Weakly basic d) All of these
49.
The carbonates and
phosphates of which elements are insoluble in water
a) Na and K b)
Na and Be
c) Li
and Mg d)
All of these
50.
All alkaline earth metals
react with water at room temperature to release hydrogen and give basic
solutions except
a) Be and Ca b)
Be and Mg
c) Ca
and Mg d)
Mg and Sr
51.
Lithium only forms normal
oxides when burnt on air but when sodium burnt in air it forms
a) Normal oxides b) Sub
oxides
c)
Peroxides d)
Super oxides
52.
The super oxides of alkali
metals are generally represented by
a) M2O b) M2O2
c) MO2 d)
M2O3
53.
The nitrates of which group
decompose on heating with the formation of nitrites and evolution of oxygen
a) IA b)
II A
c)
III A d)
IV A
54.
A small amount of calcium
chloride or mixture of KCl and KF is added to NaCl in Down’s cell
a) To make it good conductor
b) To decrease the m.p of NaCl
c) To increase the ionization of NaCl
d) To decrease the ionization of NaCl
55.
Liquid sodium in the Down’s
cell is collected at a temperature of
a) 700oC b)
600oC
c)
500oC d)
400oC
56.
The product, which is
obtained at cathode in the Down’s cell is
a) Liquid Sodium b) Dry
chlorine
c)
Water d)
Hydrogen
57.
Which is manufactured by
the electrolysis of fused sodium chloride?
a) NaOH b)
NaHCO3
c) Na
d)
Na2CO3
58.
Which of the following does
not conduct electricity?
a) Boron b)
Gallium
c)
Indium d)
Thallium
59.
Which alkali metal is rare
and found in a small amount in all – igneous rocks?
a) Li b)
Na
c) K d)
Fr
60.
The ingredient of baking
powder is
a) NaHCO3 b)
NaOH
c)
Na2CO3 d)
NaCl
61.
The formula of plaster of
Paris is
a) CaSO4 b)
CaSO4.H2O
c)
CaSO4.2H2O d) 2CaSO4.H2O
62.
Which of the following is
fluorspar?
a) CaO b) CaCO3
c)
CaF2 d) NaOH
63.
Potassium is kept in
a) Water b)
Alcohol
c)
Ammonia d)
Kerosene oil
64.
Which one has high m.p?
a) NaCl b) NaBr
c)
Nal d)
NaF
65.
Which one of the following
is most basic?
a) Al2O3 b)
SiO2
c) P2O5 d)
MgO
66.
Gypsum is
a) CaSO4.2H2O
b) CaSO4.H2O
c)
CaSO4 d)
MgSO4
67.
Which one is commonly used
as a laboratory desicator?
a) Na2CO3 b)
NaCl
c)
CaCl3 d)
NaOH
68.
The radioactive alkaline
earth metal is
a) Be b)
Mg
c) Ra
d)
Ba
69.
Which one of the following
elements has its compounds which are diamagnetic and colourless?
a) Be b)
Sr
c) Na
d)
All of these
70.
Which metal is an important
component of transistors?
a) Ag b)
Au
c) Ra
d)
Os
71.
Which impurities are
present in common salt?
a) Na2SO4 b)
CaSO4
c)
CaCl2 d)
All of these
72.
K can displace Na from NaCl
due to
a) Greater I.P of K
b) Greater I.P of Na
c) More electropositivity of K
d) More electropositivity of Na
73.
The alkali metal, which is
artificially prepared
a) Na b)
Rb
c) Fr
d)
Cs
74.
The chemical use for the
production of CO2 in the fire extinguishers is
a) NaOH
b) NaCl
c) NaHCO3 and dilute acid
d) NaHCO3 and NaOH
75.
LiCl is more soluble in
organic solvents than NaCl because
a) Li+1 has higher heat of hydration than Na+
b) Li+1 has lower heat of hydration than Na+
c) LiCl is more covalent than NaCl
d) Lattice energy of NaCl is less than that of LiCl
76.
Which compound is used for
uric acid treatment in human beings?
a) Na2CO3 b)
NaHCO3
c)
Li2CO3 d)
NaNO3
77.
Which element is used in
T.V picture tube?
a) Na b)
K
c) Ca
d)
Cs
78.
Which one is used in the
manufacture of chalk pencils?
a) Marble b)
Gypsum
c)
Epsom salt d)
Baking soda
79.
Plaster of Paris has a
structure
a) Cubic b)
Monoclinic
c)
Hexagonal d)
Orthorhombic
80.
Potassium super oxide (KO2)
is used in breathing equipments for mountaineers and space craft because it
absorb
a) Oxygen and giving out CO2 at the same time
b) N2 and giving out CO2 at the same time
c) CO2 and giving out O2 at the same time
d) Pollutants and giving out O2 at the same time
81.
The hydroxide, which is
called milk of magnesium and is used for treatment of acidity in stomach,
is
a) Ca(OH)2 b)
Mg(OH)2
c)
Sr(OH)2 d)
Ba(OH)2
82.
Mg+2 is smaller
the Na+1 because
a) Mg+2 has fewer electron than Na+1
b) Mg+2 has greater electron than Na+1
c) Mg+2 has greater atomic number than Na+1
d) Mg+2 has low I.P than Na+1
83.
Which of them has almost
same electronegativity?
a) Be, B b)
B, Al
c)
Be, Al d)
K, Na
84.
A mixture formed by mixing
one volume of slaked lime Ca(OH)2 with three or four volume of sand
and water to form a thick paste is called
a) Lime water b)
Dead water
c)
Quick lime d) Milk of lime
85.
If the compound has the
same crystal structure and analogous formulae, they are called
a) Isotopes b)
Allotropes
c)
Isomers d)
Isobars
86.
Out of all elements of
group IA, the highest heat of hydration
is for _______
a) K b)
Rb
c)
Cs d)
Li
87.
The nitride ion in lithium
nitride is composed of
a) 7 protons and 7 electrons
b) 10 protons and 7 electrons
c) 10 protons and 10 electrons
d) 10 protons and 5 electrons
88.
When NH3 is
passed over heated sodium at
300oC,
the product formed is
a) NaNH2 b)
NaNO2
c)
Na(NH3)2 d)
Na3N
89.
Sodium metal can be stored
under
a) Benzene b)
Kerosene
c)
Alcohol d)
Water
90.
Chile sulphur is
a) NaNO2 b)
KNO2
c)
NaNO3 d)
KNO3
91.
Alkali metals do not exist
in
a) Monoatomic b) Diatomic
c)
Triatomic d)
None of these
92.
In general alkali metals
act as ________
a) Reducing agents
b) Oxidizing agents
c) Both reducing and oxidizing agents
d) None of these
93.
Sodium is not observed in +
2 oxidation state
because
of its ______
a) High first ionization potential
b) High second oxidation potential
c) High ionic radius
d) High electronegativity
94.
The metallic luster of
sodium is explained by the presence of _______
a) Na+ ions
b) Conduction electrons
c) Free protons
d) A body centered cubic lattice
95.
In the alkali metal series,
Cesium is the most
reactive
metal because _______
a) Its incomplete shell is nearest to nucleus
b) The valence electron has a larger orbit than the orbit of the valence electron of any
of the other.
c) It exerts considerable beautiful force on the valence electrons
d) It is a heavier metal.
96.
A graphite anode is used in
Down’s cell for the
production
of sodium because ______
a) It does not react with sodium
b) It does not react with chlorine
c) It is easy to fashion in circular form
d) It floats on the fused sodium chloride
97.
Alkaline earth metals form
______ carbides on heating with
carbon.
a) Stable b)
Unstable
c)
Soluble d)
None of these
98.
When burnt in air, Lithium
forms _______
a) Normal oxide b) Peroxide
c)
Super oxide d) None of these
99.
Sodium bicarbonate is
commonly called
a) Soda ash b)
Baking soda
c)
Caustic soda d) None of these
100.
_______ is a stronger
base.
a) NaOH b)
KOH
c)
LiOH d)
HCl
101.
Excess of NaOH reacts with
zinc to form
a) Zn(OH)2 b)
ZnH2ZA
c)
Na2ZnO2 d)
ZnO
102.
Which of the following
represents calcium
chlorite?
a) CaClO2 b)
Ca(ClO4)2
c)
Ca(ClO3)2 d)
Ca(ClO2)2
103.
Sodium hydroxide solution
reacts with phosphorus to give
phosphine, To bring about
we
need this reaction
a) White phosphorus and dilute NaOH
b) White phosphorus and concentrated NaOH
c) Red phosphorus and dilute NaOH
d) Red phosphorus and concentrated NaOH
104.
Sodium reacts with water
more vigorously than
lithium
because it
a) Has higher atomic weight
b) Is more electronegative
c) Is more electropositive
d) Is a metal
105.
Plaster of Paris hardens by
a) Giving off CO2
b) Changing into CaCO3
c) Uniting with water
d) Giving
out water 
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