CBSE Class 11 Chemistry s-Block Elements MCQs

Refer to CBSE Class 11 Chemistry s-Block Elements MCQs provided below available for download in Pdf. The MCQ Questions for Class 11 Chemistry with answers are aligned as per the latest syllabus and exam pattern suggested by CBSE, NCERT and KVS. Multiple Choice Questions for Chapter 10 The s Block Elements are an important part of exams for Class 11 Chemistry and if practiced properly can help you to improve your understanding and get higher marks. Refer to more Chapter-wise MCQs for CBSE Class 11 Chemistry and also download more latest study material for all subjects

MCQ for Class 11 Chemistry Chapter 10 The s Block Elements

Class 11 Chemistry students should refer to the following multiple-choice questions with answers for Chapter 10 The s Block Elements in Class 11.

Chapter 10 The s Block Elements MCQ Questions Class 11 Chemistry with Answers

I. MCQ - Choose Appropriate Alternative

Question : The oxides of beryllium are.
(a) Acidic 
(b) Basic 
(c) Ba+2 
(d) Mg+2

Question : Which ion will have the maximum value of heat of hydration?
(a) Na+
(b) Cs+ 
(c) Ba+2
(d) Mg+2

Question : Which one of the following is not an alkali metal?
(a) Sodium sulphate
(b) Potassium sulphate 
(c) Zinc sulphate
(d) Barium sulphate

Question : The element cesium bears resemblance with.
(a) Ca
(b) Cr 
(c) Both of the above
(d) None of the above

Question : Chile saltpeter had the chemical formula
(a) NaNO3 
(b) KNO3 
(c) Na2B4O7 
(d) Na2CO3H2O

Question : The ore CaSO42H2O has the general name.
(a) Gypsum
(b) Dolomite
(c) Calcite
(d) Epsom salt

Question : Down's cell is used to prepare.
(a) Sodium carbonate 
(b) Sodium bicarbonate
(c) Sodium metal 
(d) Sodium hydroxide

Question : Which element is deposited at the cathode during the electrolysis of brine in Nelson's cell?
(a) H2 
(b) Na 
(c) CI2 
(d) O2

Question : Ionic radius of potassium is.
(a) 60 pm
(b) 133 pm 
(c) 99 pm
(d) 169 pm

Question : Among alkaline Earth Metals, the highest heat of hydration is of.
(a) Be
(b) Sr 
(c) Rb
(d) Cs

Question : The chemical formula of sylvite is.
(a) Na2CO3. H2O
(b) KCI 
(c) KCI. MgCL2. 6H2O
(d) NaCI

Question : The chemical formula of Alumite (Alum stone) is.
(a) KCI. MgCI2. 6H2
(b) KCI 
(c) Na2B4O7. 10H2
(d) K2SO4 Al(SO4)3. 2Al(OH)3

Question : Among alkali metals the lowest atomic number is of.
(a) Rb
(b) K 
(c) Sr
(d) Li

Question : 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

Question : Magnesium is an essential constituent of.
(a) Storaata
(b) Plants 
(c) ChlorophyII
(d) None of the above

Question : Which of the alkali earth metal has radioactive nature.
(a) Be
(b) Rb 
(c) Both of the above
(d) Na

Question : 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

Question : Dolomite is a compound of which elements.
(a) Be
(b) Mg 
(c) Ca
(d) Ba

Question : The melting point and boiling point of which alkaline earth metal is high.
(a) Sr
(b) Mg 
(c) Be
(d) Na

Question : 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

Question : Potassium, rubidium and caeslium are so highly reactive that they react with ice even at.
(a) -100°C
(b) -200°C
(c) -50°C
(d) -0°C

Question : Among the alkaline earth metal which has least reactivity even upto 800°C
(a) Ba
(b) Cs
(c) Li
(d) Be

Question : Plaster of paris is formed after heating upto 100°C
(a) Mg(NO3)2
(b) CaSO4, 2H2O(gypsum)
(c) NaNO2
(d) LiNO3

Question : 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

Question : 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

Question : Which alkali metal behave different by from others?
(a) Mg
(b) Na   
(c) Rb
(d) Li

Question : Spodumene, petalite, halite, natron, alinite are the common minerals of.
(a) Alkali metals
(b) Alkaline earth metals
(c) Both of the above
(d) Li

Question : 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

Question : Lime is used in.
(a) Glass industry
(b) Glass and paper industries
(c) Paper industries
(d) None of the above

Question : The elements which are very abundant in earth crust are__________
(a) Si & Aℓ
(b) Ca & Mg
(c) B & Aℓ
(d) All

Question : The oxides of Be are ___________
(a) Acidic
(b) Basic
(c) Amphoteric
(d) None

Question : 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

Question : Which one of the following is not an alkali metal?
(a) Francium
(b) Caesium
(c) Rubidium
(d) Radium

Question : Which of the following sulphates is not soluble in water?
(a)Sodium sulphate
(b) Potassium sulphate
(c) Zinc sulphate
(d) Barium sulphate

Question : The ore CaSO4.2H2O has the general name____
(a) Gypsum
(b) Dolomite
(c) Sodium metal
(d) Sodium hydroxide

Question : 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.

Question : 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

Question : 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

Question : Alkali metals form bonds
(a) Ionic
(b) Covalent
(c) Metallic
(d) Co-ordinate covalent

Question : The alkali metals, which have radioactive isotopes
(a) Li
(b) Na
(c) K
(d) K and Rb

Question : Halite is the mineral of
(a) Sodium
(b) Potassium
(c) Lithium
(d) Cesium

Question : Na2SO3.10H2O is the mineral of sodium and is called
(a) Spodumene
(b) Halite
(c) Natron
(d) Sylvite

Question : Which one of the following is dolomite?
(a) MgCO3
(b) MgCO3.CaCO3
(c) CaCO3
(d) BaSO4

Question : 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

Question : Sodium imparts color to Bunsen flame
(a) Green
(b) Violet
(c) Blue
(d) Yellow

Question : All alkaline earth metals are white except
(a) Mg
(b) Ca
(c) Be
(d) Sr

Question : Metals, which are higher that water, are
(a) Alkaline earth metals
(b) Coinage metals
(c) Alkali metals
(d) All of these

Question : Except lithium, the hydroxides of all alkali metals are
(a) Strongly acidic
(b) Strongly basic
(c) Weakly basic
(d) All of these

Question : 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

Question : 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

Question : 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

Question : The super oxides of alkali metals are generally represented by
(a) M2O
(b) M2O2
(c) MO2
(d) M2O3

Question : 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

Question : 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

Question : Liquid sodium in the Down’s cell is collected at a temperature of
(a) 700°C
(b) 600°C
(c) 500°C
(d) 400°C

Question : The product, which is obtained at cathode in the Down’s cell is
(a) Liquid Sodium
(b) Dry chlorine
(c) Water
(d) Hydrogen

Question : Which is manufactured by the electrolysis of fused sodium chloride?
(a) NaOH
(b) NaHCO3
(c) Na
(d) Na2CO3

Question : Which of the following does not conduct electricity?
(a) Boron
(b) Gallium
(c) Indium
(d) Thallium

Question : Which alkali metal is rare and found in a small amount in all – igneous rocks?
(a) Li
(b) Na
(c) K
(d) Fr

Question : The ingredient of baking powder is
(a) NaHCO3
(b) NaOH
(c) Na2CO3
(d) NaCl

Question : The formula of plaster of Paris is
(a) CaSO4
(b) CaSO4.H2O
(c) CaSO4.2H2O
(d) 2CaSO4.H2

Question : Which of the following is fluorspar?
(a) CaO
(b) CaCO3
(c) CaF2
(d) NaOH

Question : Potassium is kept in
(a) Water
(b) Alcohol
(c) Ammonia
(d) Kerosene oil

Question : Which one has high m.p?
(a) NaCl
(b) NaBr
(c) Nal
(d) NaF

Question : Which one of the following is most basic?
(a) Al2O3
(b) SiO2
(c) P2O5
(d) MgO

Question : Gypsum is
(a) CaSO4.2H2O
(b) CaSO4.H2O
(c) CaSO4       
(d) MgSO4

Question : Which one is commonly used as a laboratory desicator?
(a) Na2CO3
(b) NaCl
(c) CaCl3
(d) NaOH

Question : The radioactive alkaline earth metal is
(a) Be
(b) Mg
(c) Ra
(d) Ba

Question : Which one of the following elements has its compounds which are diamagnetic and colourless?
(a) Be
(b) Sr
(c) Na
(d) All of these

Question : Which metal is an important component of transistors?
(a) Ag
(b) Au
(c) Ra
(d) Os

Question : Which impurities are present in common salt?
(a) Na2SO4
(b) CaSO4
(c) CaCl2
(d) All of these 

Question : 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

Question : The alkali metal, which is artificially prepared
(a) Na
(b) Rb
(c) Fr
(d) Cs

Question : 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

Question : 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

Question : Which compound is used for uric acid treatment in human beings?
(a) Na2CO3
(b) NaHCO3
(c) Li2CO3
(d) NaNO3

Question : Which element is used in T.V picture tube?
(a) Na
(b) K
(c) Ca
(d) Cs

Question : Which one is used in the manufacture of chalk pencils?
(a) Marble
(b) Gypsum
(c) Epsom salt
(d) Baking soda

Question : Plaster of Paris has a structure
(a) Cubic
(b) Monoclinic
(c) Hexagonal
(d) Orthorhombic

Question : 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

Question : 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

Question : 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

Question : Which of them has almost same electronegativity?
(a) Be, B
(b) B, Al
(c) Be, Al
(d) K, Na

Question : 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

Question : If the compound has the same crystal structure and analogous formulae, they are called
(a) Isotopes
(b) Allotropes
(c) Isomers
(d) Isobars

Question : Out of all elements of group IA, the highest heat of hydration is for _______
(a) K
(b) Rb
(c) Cs
(d) Li

Question : 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

Question : When NH3 is passed over heated sodium at 300oC, the product formed is
(a) NaNH2
(b) NaNO2
(c) Na(NH3)2
(d) Na3N

Question : Sodium metal can be stored under
(a) Benzene
(b) Kerosene
(c) Alcohol
(d) Water

Question : Chile sulphur is
(a) NaNO2
(b) KNO2
(c) NaNO3
(d) KNO3

Question : Group 2 elements are called alkaline earth metals why? Choose the correct reason(s).
(i) Hydroxides formed by group 2 elements are alkaline in nature.

(ii) Their metal oxides are found in the earth’s crust.
(iii) Their oxides are alkaline in nature
(iv) Group 2 elements react with alkalies
a) (i), (ii) and (iii)
b) (i) and (ii)
c) (ii) and (iv)
d) (ii) and (iii)

Answer : (i), (ii) and (iii) 

Question : Which of the following alkali metal is highly radioactive?
a) Francium
b) Rubidium
c) Caesium
d) None of these

Answer : Francium 

Question : Which of the following statements is not correct for alkali metals?
a) Alkali metals exist in free state in nature.
b) Alkali metals are the most electropositive metals
c) These metals have the largest size in a particular period of the periodic table.
d) None of these

Answer :  Alkali metals exist in free state in nature. 

Question : Which of the following has largest size ?
a) Na
b) Na
c) Na+
d) Can’t be predicted

Answer :  Na 

Question : Ionization potential of Na would be numerically the same as
a) electronegativity of Na+
b) ionization potential of Mg
c) None of these
d) electron affinity of Na+

Answer : electronegativity of Na+ 

Question : Which one of the following properties of alkali metals increases in magnitude as the atomic number rises ?
a) Ionic radius
b) Melting point
c) Electronegativity
d) First ionization energy

Answer : Ionic radius 

Question : Which of the following has density greater than water?
a) Rb
b) Na
c) Li
d) K

Answer : Rb 

Question : The elements of group 1 provide a colour to the flame of Bunsen burner due to
a) low ionization potential
b) low melting point
c) softness
d) presence of one electron in the outermost orbit

Answer : low ionization potential 

Question : The metal that produces red-violet colour in the nonluminous flame is
a) Rb
b) Ba
c) Ag
d) Pb

Answer : Rb 

Question : The alkali metals have low melting point. Which of the following alkali metal is expected to melt if the room temperature rises to 30°C?
a) Cs
b) K
c) Na
d) Rb

Answer : Cs

Question :  In the case of the alkali metals
a) the cation is smaller than the atom
b) the cation and the atom have about the same size
c) the cation is larger than the atom
d) the cation is less stable than the atom

Answer : the cation is smaller than the atom 

Question : The element which on burning in air gives peroxide is
a) sodium
b) caesium
c) lithium
d) rubidium

Answer : sodium 

Question : Which one of the alkali metals, forms only, the normal oxide, M2O on heating in air ?
a) Li
b) Rb
c) K
d) Na

Answer : Li 

Question : Which of the following is used as a source of oxygen in space capsules, submarines and breathing masks ?
a) KO2
b) Li2O
c) Both
d) None of these

Answer : KO2 

Question : Which hydride is most stable
a) LiH
b) KH
c) NaH
d) CsH

Answer : LiH 

Question : The most stable compound is
a) LiF
b) LiCl
c) LiBr
d) LiI

Answer : LiF 

Question : Which of the following represents a correct sequence of reducing power of the following elements?
a) Li > Cs > Rb
b) Cs > Li > Rb
c) Rb > Cs > Li
d) Li > Rb > Cs

Answer : Li > Cs > Rb 

Question : What is the colour of solution of alkali metals in liquid ammonia?
a) Blue
b) Violet
c) Bronze
d) Green

Answer : Blue 

Question : Which is most basic in character ?
a) CsOH
b) NaOH
c) KOH
d) LiOH

Answer :  CsOH 

Question : Which compound will show the highest lattice energy
a) NaF
b) RbF
c) CsF
d) KF

Answer :  NaF

MCQs for Chapter 10 The s Block Elements Chemistry Class 11

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