MCQ Questions Chapter 10 The s-Block Elements Class 11 Chemistry

Please refer to MCQ Questions Chapter 10 The s-Block Elements Class 11 Chemistry with answers provided below. These multiple-choice questions have been developed based on the latest NCERT book for class 11 Chemistry issued for the current academic year. We have provided MCQ Questions for Class 11 Chemistry for all chapters on our website. Students should learn the objective based questions for Chapter 10 The s-Block Elements in Class 11 Chemistry provided below to get more marks in exams.

Chapter 10 The s-Block Elements MCQ Questions

Please refer to the following Chapter 10 The s-Block Elements MCQ Questions Class 11 Chemistry with solutions for all important topics in the chapter.

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

Question. Bleaching action of bleaching powder liberation of is due to the 
(a) O₂
(b) OCI^–
(c) CI₂
(d) CI^–     

Question. Beryllium and aluminium exhibit many properties which are similar. But, the two elements differ in
(a) exhibiting maximum covalency in compounds
(b) forming polymeric hydrides
(c) forming covalent halides
(d) exhibiting amphoteric nature in their oxides   

Question. Bleaching powder is obtained by treating chlorine with
(a) CaCO₃
(b) Ca(OH)
(c) Cao
(d) None of these     

Question. For which one of the following minerals, the composition given is incorrect ?
(a) Glauber’s salt — Na₂SO₄ · 10H₂O
(b) Borax — Na₂B₄O₇ -7H₂O
(c) Carnallite — KCI· MgCI₂ · 6H₂O
(d) Soda ash — Na₂CO₃   

Question. The chemical formula offeldspar is
(a) KAISi₃O₈
(b) Na₃AlF₆
(c) NaAlO₂
(d) K₂SO₄ ·Al₂ (SO₄)₃ -4Al(OH)₃   

Question. The ionic mobility of alkali metal ions in aqueous solution is maximum for
(a) K⁺
(b) Rb⁺
(c) Li⁺
(d) Na⁺     

Question. Na₂S₂O₃ isreduced by I₂ to 
(a) Na₂S
(b) Na₂SO₄
(c) NaHSO₃
(d) Na₂S₄O₆     

Question. On strong heating sodium bicarbonate changes into
(a) sodium monoxide 
(b) sodium hydroxide
(c) sodium carbonate
(d) sodium peroxide       

Question. What happens when aluminium and zinc salts react with an excess of NaOH? 
(a) White precipitate is fo1med
(b) White precipitate of both Zn and Al first formed redissolved in excess ofNaOH
(c) White precipitate of AI redissolves but that of Zn does not
(d) White precipitate of Zn redissolves and that of Al does not     

Question. Which one of the following will dissolve in water most readily? 
(a) I₂
(b) BaCO₃
(c) KF
(d) Pbl₂     

Question. Which compound is used in photography? 
(a) Na₂SO₅
(b) Na₂S₂O₈
(c) Na₂S₂O₆
(d) Na₂S₂O₃     

Question. Sodium thiosulphate is a 
(a) reducing agent
(c) complexing agent
(b) oxidising agent
(d) bleaching agent     

Question. A metal ‘M’reacts with N₂ to giveacomp01md ‘A’ (M₃N). ‘A’ on heating at high temperature gives back ‘M’ and ‘A’ on reacting with H₂O gives a gas B. ‘B’ turns CuSO₄ solution blue on passing through it. M and B can be
(a) Al and NH₃
(b) Li and NH₃
(c) Na and NH₃
(d) Mg and NH₃     

Question. Based on lattice energy and other considerations which one of the following alkali metal chlorides is expected to have the highest melting point ? 
(a) RbCI
(b) KCl
(c) NaCl
(d) LiCl     

Question. Solvay process is used for the manufacture of 
(a) NaOH
(b) Na₂CO₃
(c) NH₃
(d) NaCl     

Question. One of the elements present in camallite shows flame colouration. The colour of the flame is 
(a) orange
(b) green
(c) yellow
(d) lilac   

Question. Which of the following alkali metal ions has lowest ionic mobility in aqueous solution? 
(a) Rb⁺
(b) Cs⁺
(c) Li⁺
(d) Na⁺   

Question. The ionic conductance of following  cation in a given concentration are in the order
(a) Li⁺ < Na⁺ < K⁺ < Rb⁺
(b) Li⁺ > Na⁺ > K⁺ > Rb⁺
(c) Li⁺ < Na⁺ > K⁺ > Rb⁺
(d) Li⁺ = Na⁺ < K⁺ < Rb⁺   

Question. A metallic oxide reacts with water to fonn its hydroxide, hydrogen peroxide and also liberates oxygen. The metallic oxide could be 
(a) Cao
(b) KO₂
(c) Li₂O
(d) Na₂O₂     

Question. What colour is imparted into the flame when lithium is burnt? 
(a) Golden yellow
(b) Brick red
(c) Crimson red
(d) Grassy green     

Question. Lithium shows diagonal relationship with 
(a) sodium
(b) magnesium
(c) calcium
(d) aluminimn       

Question. All the s-block elements of the periodic table and placed in the groups 
(a) IA and II A
(b) III A and IV A
(c) B subgroups
(d) VA to VII A     

Question. Which of the following is known as Glauber’s salt?
(a) Na₂S₂O₃ ·5H₂O
(c) Na₂CO₃ · 10H₂O
(b) Na₂SO₄ · 10H₂O
(d) Na(NH₄)HPO₄     

Question. Le-blanc process is employed in the manufacture of
(a) baking soda
(b) washing soda 
(c) potash
(d) plaster of Paris     

Question. The characteristic not related to alkali metal is 
(a) high ionisation energy
(b) their ions are isoelectronic with noble gases
(c) low melting point
(d) low electronegativity       

Question. The products obtained on heating LiNO₃ will be 
(a) LiNO₂ + O₂
(b) Li₂O + NO₂ + O₂
(c) Li₃N + O₂
(d) Li₂O + OH + O₂     

Question. The primary standard  solution for the estimation of Na₂S₂O₃ is
(a) I₂ solution
(c) K₂Cr₂O₇
(b) KMnO₄
(d) oxalic acid     

Question. Which one of the following statements is correct for all the alkali metals? 
(a) Their nitrates on heating give NO₂ and O₂
(b) Their carbonates decompose on heating to give CO₂ and the metal oxide
(c) They react with oxygen to give mainly the oxide M₂O
(d) They react with halogens to give the halides MX   

Question. Acidic solution of S₂O^2-₃ is converted to …… in the presence of I₂ . 
(a) S₄O₆^2- + I^–
(b) SO₄^2- + I^–
(c) SO₃ + I^–
(d) S₄O₆^2- + I₃^–   

Question. Sodium is heated in air at 300°C to form X. X absorbs CO₂ and forms Na₂CO₃ and Y? Which of the following is Y? 
(a) H₂
(b) O₂
(c) H₂O₂
(d) O₃   

Question. Which of the following is not correct? 
(a) Iodine oxidises sodium thiosulphate to sodium tetrathionate
(b) Sodium thiosulphate is soluble in water
(c) Ozone is used to identify the presence of unsaturation in alkenes
(d) Sodium thiosulphate reacts with iodine to form sodium sulphate   

Question. Most powerful reducing agent is
(a) Li
(b) Na
(c) Ca
(d) Mg     

Question. The difference of water molecules in gypsum and plaster of Paris is 
(a) 5/2
(b) 2
(c) 1/2
(d) 1 1/2         

Question. Which of the following is known as dead burnt plaster?
(a) Gypsum 
(b) Plaster of Paris
(c) Anhydrite
(d) None of the above     

Question. CaC₂ + N₂ → A,productA is 
(a) CaCN₂
(b) CaCN₂ + C
(c) CaCN₂ + N₂
(d) None of these       

Question. Among the following, which is insoluble in water?
(a) Sodium fluoride
(b) Potassium fluoride
(c) Beryllium fluoride
(d) Magnesium fluoride     

Question. Which one of the following processes is used for the manufacture of calcium?
(a) Reduction of CaO with carbon
(b) Reduction of CaO with hydrogen
(c) Electrolysis ofa mixture of anhydrous CaCI₂ and KCI
(d) Electrolysis of molten Ca(OH)₂   

Question. The chemical which is used for plastering the broken bones is
(a) (CaSO₄ )₂· H₂O
(b) MgSO₄ · 7H₂O
(c) FeSO₄ · 7H₂O
(d) CuSO₄ · 5H₂O     

Question. Which one of the following orders of stability is correct?
(a) MgCO₃ > CaCO₃ > SrCO₃ > BaCO₃
(b) BaCO₃ > SrCO₃ > CaCO₃ > MgCO₃
(c) MgCO₃ > BaCO₃ > SrCO₃ > CaCO₃
(d) CaCO₃ > BaCO₃ > MgCO₃ > SrCO₃   

Question. Chlorine reacts with ‘X’ to form bleaching powder. ‘X’ is
(a) dry slaked lime
(c) acetone
(b) sodium hydroxide
(d) chloral     

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

Question. Plaster of Paris on making paste with little water sets to hard mass due to formation of 
(a) CaSO₄
(b) CaSO₄ · 1/2 H₂O
(c) CaSO₄ · H₂O
(d) CaSO₄ · 2H₂O       

Question. One mole of magnesium nitride on the reaction with an excess of water gives 
(a) one mole of NH₃
(b) two moles of NH₃
(c) one mole of HNO₃
(d) two moles of HNO₃       

Question. When carbon monoxide is passed over solid caustic soda heated to 200°C, it forms 
(a) Na₂CO₃
(b) NaHCO₃
(c) HCOONa
(d) CH₃COONa     

Question. Aqueous solution of Na₂S₂O₃ on reaction with Cl₂ gives
(a) Na₂S₄O₆
(b) NaHSO₄ 
(c) NaCl
(d) NaOH     

Question. Which of the following metals is extracted by the electrometallmgical method ?
(a) Fe
(b) Cu
(c) Ni
(d) Na     

Question. Molten sodium chloride conducts electricity through the following 
(a) free electrons
(b) free ions
(c) free molecules
(d) free atoms     

Question. When KI is added to acidified solution of sodium nitrite then 
(a) NO gas is liberated and I₂ is set free
(b) N₂ gas is liberated and HI is produced
(c) N₂Ogas is liberated and I₂ is set free
(d) N₂ gas is liberated and HOI is produced   

Question. Microcosmic salt is 
(a) Na₄P₂O₇
(b) Na (NH₄)HPO₄
(c) Na (NH₃)HPO₄ ·4H₂O
(d) MgNH₄PO₄     

Question. A solution of sodium thiosulphate on addition of few drops of ferric chloride gives violet colom due to the formation of 
(a) Na₂S₄O₆
(b) Fe₂ (SO₄)₃
(c) Fe₂ (S₂O₃)₃
(d) Fe₂ (S₂O₃)₂     

Question. Which of the following is correct ? 
(a) In the Castner’s process of sodium extraction, NaCl is used as an electro! yte
(b) Sodium reduces CO₂ to carbon
(c) Mg reacts with cold water and liberate hydrogen gas.
(d) Magnalium is an alloy of Mg and Zn   

Question. Consider the following abbreviations for hydrated alkali ions.
X = [Li(H₂O)_n]⁺; Y = [K(H₂O)_n]⁺; Z = [Cs (H₂O)_n]⁺
What is the con-ect order of size of these hydrated alkali ions ? 
(a) X > Y > Z
(b) Z > Y > X
(c) X = Y = Z
(d) Z > X > Y         

Question. Phosphine, acetylene and ammonia can be formed by treating water with 
(a) Mg₂P₂ , Al₄C₃ , Li₃N
(b) Ca₃P₂ , CaC₂ , Mg₃N₂
(c) Ca₃P₂ , CaC₂ , CaCN₂
(d) Ca₃P₂ , Mg₂C, NH₄NO₃   

Question. Which of the following metal carbonates decomposes on heating? 
(a) MgCO₃
(b) Na₂CO₃
(c) K₂CO₃
(d) Rb₂CO₃     

Question. The salts of which alkaline earth metal are used in the form of manure ? 
(a) Mg
(b) Ca
(c) Ba
(d) Sr     

Question. Which of the following is not an ore of magnesium?
(a) Carnalli te
(c) Calamine
(b) Dolomite
(d) Sea water     

Question. Thomas slag is
(a) Ca₃ (PO₄ )₂ · 2H₂O
(b) Ca₃ (PO₄ )₂ · CaSiO₃
(c) MgSiO₃
(d) CaSiO₃       

Question. The product obtained on fusion of BaSO₄ and Na₂CO₃ is
(a) BaCO₃
(b) Bao
(c) Ba(OH)₂
(d) BaHSO₄   

Question. Which metal is present in chlorophyll? 
(a) Ca
(b) Co
(c) Zn
(d) Mg       

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