CHAPTER # 2 S-Block Elements MCQ's

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               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) -0o
                         


               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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