This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part Ii > Class 11 Chemistry (Part Ii) Chapter 10 The S Block Elements – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 10 The S Block Elements Quiz 1 (40 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the general trend for the atomic radii of s-block elements as you go down the group? A) Increases. B) Decreases. C) Remains constant. D) No specific trend. Show Answer Correct Answer: A) Increases. 2. What is the main use of magnesium hydroxide? A) Manufacture of glass. B) Antacid. C) Neutralizing acids in waste water treatment. D) Making rayon. Show Answer Correct Answer: B) Antacid. 3. Which compound is used in the paper industry for its properties? A) Sodium hydroxide. B) Sodium carbonate. C) Magnesium hydroxide. D) Calcium hydroxide. Show Answer Correct Answer: B) Sodium carbonate. 4. Li is different from its family members due to A) Small size. B) High charge density. C) Less electropositivity. D) All of the above. Show Answer Correct Answer: D) All of the above. 5. Which s-block element has a weak tendency to form complex compounds? A) Rubidium. B) Sodium. C) Potassium. D) Lithium. Show Answer Correct Answer: D) Lithium. 6. Which s-block element has the highest melting point? A) Li. B) K. C) Na. D) Rb. Show Answer Correct Answer: D) Rb. 7. The first ionization potential of alkaline earth metal is greater than alkali metals because A) They are more reactive. B) They have greater atomic radii. C) They have smaller atomic sizes. D) All. Show Answer Correct Answer: C) They have smaller atomic sizes. 8. Which compound is commonly used in the paper industry? A) Magnesium hydroxide. B) Sodium hydroxide. C) Calcium hydroxide. D) Sodium carbonate. Show Answer Correct Answer: D) Sodium carbonate. 9. The hydration energy of Mg2+ is larger than that of A) Mg3+. B) Na+. C) A13+. D) Be2+. Show Answer Correct Answer: B) Na+. 10. What is the main use of strontium compounds? A) Neutralizing acids in waste water treatment. B) Fireworks. C) Water softening. D) Manufacture of glass. Show Answer Correct Answer: B) Fireworks. 11. Which s-block element reacts directly with hydrogen? A) Rubidium. B) Sodium. C) Potassium. D) Lithium. Show Answer Correct Answer: D) Lithium. 12. What is a characteristic property of s-block elements related to their metallic nature? A) Covalent oxides. B) Low tendency to form positive ions. C) High electronegativity. D) Increase in metallic character down the group. Show Answer Correct Answer: D) Increase in metallic character down the group. 13. Going across Period 3 from Na to Cl, A) The electropositivity of the elements decrease. B) The reducing power of the elements increases. C) The atomic radius of the elements increases. D) The ionisation energy of the element decreases. Show Answer Correct Answer: A) The electropositivity of the elements decrease. 14. Which s-block element is known for its characteristic flame color of apple green? A) Ca. B) Sr. C) Ba. D) Mg. Show Answer Correct Answer: C) Ba. 15. What is the general trend for the solubility of Group II hydroxides? A) Increase up the group. B) Remain constant across the group. C) Decrease down the group. D) Increase down the group. Show Answer Correct Answer: D) Increase down the group. 16. Which s-block compound is used in the paper industry? A) Magnesium hydroxide. B) Sodium hydroxide. C) Calcium hydroxide. D) Sodium carbonate. Show Answer Correct Answer: D) Sodium carbonate. 17. Which of the following alkali metals has the least melting point? A) K. B) Li. C) Rb. D) Cs. Show Answer Correct Answer: D) Cs. 18. The basic strength of which hydroxide is maximum A) NaOH. B) Ca(OH)2. C) LiOH. D) KOH. Show Answer Correct Answer: D) KOH. 19. Which of the following elements does not form hydrides by direct heating with di-hydrogen? A) Mg. B) Ba. C) Be. D) Sr. Show Answer Correct Answer: C) Be. 20. Which s-block element has the lowest electronegativity? A) K. B) Na. C) Rb. D) Li. Show Answer Correct Answer: D) Li. 21. Which of the carbonates given below is unstable in air and is kept in CO2 atmosphere to avoid decomposition? A) CaCO3. B) BaCO3. C) MgCO3. D) BeCO3. Show Answer Correct Answer: D) BeCO3. 22. What is the general trend for the hydration enthalpies of s-block elements? A) Remain constant across the group. B) Increase up the group. C) Increase down the group. D) Decrease down the group. Show Answer Correct Answer: C) Increase down the group. 23. Among the alkali metals, the metal with the highest ionization potential is A) Cs. B) K. C) Li. D) Na. Show Answer Correct Answer: C) Li. 24. Alkaline earth metals P and Q have 4 shells and 5 shells respectively. Choose correct statement about P and Q. A) P is a better conductor than Q. B) P is more reactive than Q. C) P has a higher ionisation energy than Q. D) P has a larger atomic radius than Q. Show Answer Correct Answer: C) P has a higher ionisation energy than Q. 25. What is the characteristic flame color of strontium? A) Brick red. B) Deep red. C) Blood red. D) Apple green. Show Answer Correct Answer: C) Blood red. 26. Which s-block element has the highest solubility of its sulphate? A) Mg. B) Ba. C) Ca. D) Sr. Show Answer Correct Answer: A) Mg. 27. As compared to K, Na has A) Lower melting point. B) Lower electronegativity. C) Higher ionization potential. D) Larger atomic radius. Show Answer Correct Answer: C) Higher ionization potential. 28. Beryllium shows diagonal relationship with A) B. B) Mg. C) Na. D) Al. Show Answer Correct Answer: D) Al. 29. The tendency to lose the valence electrons easily by Alkali metals makes them A) Strong reducing agent. B) Weak reducing agent. C) Strong oxidizing agent. D) Weak oxidizing agent. Show Answer Correct Answer: A) Strong reducing agent. 30. Which one of the following alkali metals forms only normal oxide when it reacts with O2? A) Li. B) Rb. C) K. D) Na. Show Answer Correct Answer: A) Li. 31. M is an amphoteric oxide of Period 3. The first three ionisation energy of M increase gradually but the fourth ionisation energy increase sharply. Why the fourth ionisation energy of M is higher than expected? A) M is a s-block element. B) The electronic configuration of M is 1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{1}$. C) M is a non-metal. D) M has four valence electrons. Show Answer Correct Answer: B) The electronic configuration of M is 1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{1}$. 32. Which s-block element is known for its use in fireworks to produce a persistent intense red flame? A) Ca. B) Ba. C) Sr. D) Mg. Show Answer Correct Answer: C) Sr. 33. The formula of soda ash is A) Na$_{2}$CO$_{3}$ . H$_{2}$O. B) Na$_{2}$CO3 . 10H$_{2}$O. C) Na$_{2}$CO$_{3}$. D) Na$_{2}$CO$_{3}$. 2H$_{2}$O. Show Answer Correct Answer: C) Na$_{2}$CO$_{3}$. 34. Alkali and alkaline earth metals impart colours when heated over the burner. It is due to A) Smaller electronegativity of alkali metals. B) The smaller ionic radius of these metals. C) De-excitation of electrons from higher energy levels to low energy level. D) Excitation of electrons from low energy levels to higher energy levels. Show Answer Correct Answer: C) De-excitation of electrons from higher energy levels to low energy level. 35. What is the main use of sodium hydroxide? A) Making rayon. B) Neutralizing acids in waste water treatment. C) Water softening. D) Manufacture of glass. Show Answer Correct Answer: B) Neutralizing acids in waste water treatment. 36. Which s-block element has the highest hydration enthalpy? A) Cesium. B) Sodium. C) Lithium. D) Potassium. Show Answer Correct Answer: A) Cesium. 37. What is a characteristic property of s-block elements related to their electronegativity? A) Neutral electronegativity. B) High electronegativity. C) Low electronegativity. D) Variable electronegativity. Show Answer Correct Answer: C) Low electronegativity. 38. Which group of elements are known as Alkali metals? A) FrMg. B) LiBe. C) RbCs. D) NaK. Show Answer Correct Answer: D) NaK. 39. Which of the following statements is true about Ca(OH)2? A) It is a light blue solid. B) It is used in the preparation of bleaching powder. C) It is used in the manufacture of cement. D) It does not possess disinfectant property. Show Answer Correct Answer: B) It is used in the preparation of bleaching powder. 40. What is the main product when s-block elements react with water? A) Metal hydroxide. B) Metal chloride. C) Metal sulphate. D) Metal oxide. Show Answer Correct Answer: A) Metal hydroxide. 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