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

The s Block Elements Class 11 MCQ is one of the best strategies to prepare for the CBSE Class 11 Board exam. If you want to complete a grasp concept or work on one’s score, there is no method except constant practice. Students can improve their speed and accuracy by doing more MCQs on The s Block Elements Class 11, which will help them all through their board tests.

The s Block Elements Class 11 MCQ Questions with Answers

Class 11 Chemistry MCQ with answers are given here to Chapter 10 The s Block Elements. These MCQs are based on the latest CBSE board syllabus and relate to the latest Class 11 Chemistry syllabus. By Solving these Class 11 MCQs, you will be able to analyze all of the concepts quickly in the chapter and get ready for the Class 11 Annual exam.

Learn Class 11 The s Block Elements MCQs with answers pdf free download according to the latest CBSE and NCERT syllabus. Students should prepare for the examination by solving CBSE Class 11 Chemistry The s Block Elements MCQ with answers given below

Question 1. Which of the following has largest size ?
(a) Na
(b) Na⁺
(c) Na^–
(d) Can’t be predicted

Question 2. Ionization potential of Na would be numerically the same as
(a) electron affinity of Na⁺
(b) electronegativity of Na⁺
(c) electron affinity of He
(d) ionization potential of Mg

Question 3. Which of the following are found in biological fluids Na+, Mg²⁺, Ca²⁺, K+, Sr²⁺, Li+ and Ba²⁺
(a) Mg²⁺, Ca²⁺, and Sr²⁺
(b) Na^{2 +}and K⁺
(c) Na⁺, K+, Mg²⁺and Ca²⁺
(d) Sr⁺, Li and Ba²⁺

Question 4. Which of the following statements is not correct for alkali metals?
(a) Alkali metals are the most electropositive metals.
(b) Alkali metals exist in free state in nature.
(c) These metals have the largest size in a particular period of the periodic table.
(d) Both (b) and (c)

Question 5. 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.

Question 6. The metal that produces red-violet colour in the nonluminous flame is
(a) Ba
(b) Ag
(c) Rb
(d) Pb

Question 7. 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) and (ii)
(b) (ii) and (iv)
(c) (i), (ii) and (iii)
(d) (ii) and (iii)

Question 8. The element which on burning in air gives peroxide is
(a) lithium
(b) sodium
(c) rubidium
(d) caesium

Question 9. Which of the following has density greater than water?
(a) Li
(b) Na
(c) K
(d) Rb

Question 10. Which of the following alkali metal is highly radioactive?
(a) Rubidium
(b) Caesium
(c) Francium
(d) Both (a) and (c)

Question 11. 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) Na
(b) K
(c) Rb
(d) Cs

Question 12. In the case of the alkali metals
(a) the cation is less stable than the atom
(b) the cation is smaller than the atom
(c) the cation and the atom have about the same size
(d) the cation is larger than the atom

Question 13. For an aqueous solution under an electric field which of the following have lowest mobility ?
(a) Li⁺
(b) Na⁺
(c) K⁺
(d) Rb⁺

Question 14. 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

Question 15. Which one of the alkali metals, forms only, the normal oxide, M₂O on heating in air ?
(a) Rb
(b) K
(c) Li
(d) Na

Question 16. Which of the following is used as a source of oxygen in space capsules, submarines and breathing masks ?
(a) Li₂O
(b) Na₂O₂
(c) KO₂
(d) K₂O₂

Question 17. The ionic mobility of alkali metal ions in aqueous solution is maximum for
(a) Li⁺
(b) Na⁺
(c) K⁺
(d) Rb⁺

Question 18. Which of the following pairs of substances would give same gaseous product on reaction with water?
(a) Na and Na₂O₂
(b) Ca and CaH₂
(c) Ca and CaO
(d) Ba and BaO₂

Question 19. Which is the most basic of the following?
(a) Na₂O
(b) BaO
(c) As₂O₃
(d) Al₂O₃

Question 20. Na metal is stored in
(a) C₆H₆
(b) kerosene
(c) alcohol
(d) toluene

Question 21. Which hydride is most stable
(a) NaH
(b) KH
(c) CsH
(d) LiH

Question 22. What is the colour of solution of alkali metals in liquid ammonia?
(a) Bronze
(b) Blue
(c) Green
(d) Violet

Question 23. Which is most basic in character ?
(a) CsOH
(b) KOH
(c) NaOH
(d) LiOH

Question 24. The most stable compound is
(a) LiF
(b) LiCl
(c) LiBr
(d) LiI

Question 25. Which of the following metal is used along with lithium to make the alloy named ‘white metal’ ?
(a) Nickel
(b) Aluminium
(c) Silver
(d) Lead

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Question 26. Which of the following metal is used as a coolant in breeder nuclear reactors?
(a) Potassium
(b) Sodium
(c) Caesium
(d) Rubidium

Question 27. In crystals which one of the following ionic compounds would you expect maximum distance between centres of cations and anions?

(a) LiF
(b) CsF
(c) CsI
(d) LiI

Question 28. Which of the following represents a correct sequence of reducing power of the following elements?
(a) Li > Cs > Rb
(b) Rb > Cs > Li
(c) Cs > Li > Rb
(d) Li > Rb > Cs

Question 29. Which compound will show the highest lattice energy ?
(a) RbF
(b) CsF
(c) NaF
(d) KF

Question 30. Which of the following does not illustrate the anomalous properties of lithium?
(a) The melting point and boiling point of Li are comparatively high
(b) Li is much softer than the other group I metals
(c) Li forms a nitride Li3N unlike group I metals
(d) The ion of Li and its compounds are more heavily hydrated than those of the rest of the group

Question 31. Why lithium react less vigorously with water than other alkali metals?
(a) Lithium has most negative E ^Θ value
(b) Lithium has small size and very high hydration energy.
(c) Lithium has least negative E ^Θ value
(d) Both (a) and (b)

Question 32. On heating anhydrous Na₂CO₃,…….is evolved
(a) CO₂
(b) water vapour
(c) CO
(d) no gas

Question 33. Complete the following two reactions.
(i) 4LiNO₃ → x + O₂
(ii) 2NaNO₃ → y + O₂
(a) x = LiNO₂, y = NaNO₂
(b) x = Li₂O + NO₂, y = Na₂O + NO₂
(c) x = Li₂O + NO₂, y = NaNO₂
(d) x = LiNO₂, y = Na₂O + NO₂

Question 34. Identify the correct statement
(a) Elemental sodium can be prepared and isolated by electrolysing an aqueous solution of sodium chloride
(b) Elemental sodium is a strong oxidising agent
(c) Elemental sodium is insoluble in ammonia
(d) Elemental sodium is easily oxidised

Question 35. Among LiI, NaI, KI, the one which is more ionic and more soluble in water is
(a) KI
(b) NaI
(c) LiI
(d) None of these

Question 36. The products obtained on heating LiNO₂ will be
(a) Li₂O+ NO₂ +O₂
(b) Li₃N + O₂
(c) Li₂O+ NO+ O₂
(d) LiNO₃ + O₂

Question 37. How NH₃ is recovered in Solvay process?
(a) By reaction of NH₄Cl and Ca(OH)₂
(b) By reaction of NH₄HCO₃ and NaCl
(c) By reaction of (NH₄)₂CO₃ with H₂O
(d) By any of the above

Question 38. Why Solvay process cannot be extended to the manufacture of potassium carbonate?
(a) Ammonium hydrogen carbonate does not react with potassium chloride.
(b) Potassium hydrogen carbonate is too soluble to be precipitated by the addition of ammonium hydrogencarbonate to a saturated solution of potassium chloride.
(c) Ammonium carbonate is precipitated out instead of potassium hydrogen carbonate on reaction of ammonium hydrogen carbonate with potassium chloride
(d) None of the above

Question 39. Washing soda has formula
(a) Na2CO₃.7H₂O
(b) Na₂CO₃.10H₂O
(c) Na₂CO₃.3H₂O
(d) Na₂CO₃

Question 40. Sodium carbonate is manufactured by Solvay process. The products which can be recycled are
(a) CO₂ and NH₃
(b) CO₂ and NH₄Cl
(c) NaCl and CaO
(d) CaCl₂ and CaO.

Question 41. In Solvay ammonia process, sodium bicarbonate is precipitate due to
(a) presence of NH₃
(b) reaction with CO₂
(c) reaction with brine solution
(d) reaction with NaOH

Question 42. Which of the following is/are present as impurity in crude sodium chloride, obtained by crystallisation of brine solution?
(i) Sodium sulphate
(ii) Calcium chloride
(iii) Magnesium chloride (iv) Potassium chloride
(a) (i), (ii) and (iv)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i), (ii) and (iii)

Question 43. The process associated with sodium carbonate manufacture is known as
(a) Chamber
(b) Haber
(c) LeBlanc
(d) Castner

Question 44. Which of the following is non-metallic?
(a) B
(b) Be
(c) Mg
(d) Al

Question 45. Electronic configuration of calcium atom may be written as
(a) [Ne], 4p²
(b) [Ar], 4s²
(c) [Ne], 4s²
(d) [Ar], 4p²

Question 46. The outer electronic configuration of alkaline earth metal is
(a) ns²
(b) ns¹
(c) np⁶
(d) nd¹⁰

Question 47. Which is manufactured by electrolysis of fused NaCl ?
(a) NaOH
(b) Na
(c) NaClO
(d) NaClO₃.

Question 48. Baking soda is
(a) NaHCO₃
(b) K₂CO₃
(c) Na₂CO₃
(d) NaOH

Question 49. Baking powder contains :
(a) NaHCO₃, Ca(H₂PO₂)₂ and starch
(b) NaHCO₃, Ca(H₂PO₂)₂
(c) NaHCO₃, starch
(d) NaHCO₃

Question 50. Which of the following is the most abundant ion within cell fluids?
(a) Sodium ions
(b) Potassium ions
(c) Calcium ions
(d) None of these

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