The elements of groups 1 and 2 are known as the s-block elements. They have the last electron in the outermost s orbitals. Elements of group 1 have one valence electron and are known as alkali metals. In contrast, elements of group 2 have two valence electrons and are known as alkaline earth metals. They are present on the left side of the periodic table.
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CBSE Class 11 Chemistry Chapter 10 The s-Block Elements Worksheet – Set 3
Q1. What is the correct order of mobility of alkali metal in the aqueous solution?
(a) Na+ > K+ > Rb+ > Li+
(b) K+ > Rb+ > Na+ > Li+
(c) Rb+ > K+ > Na+ > Li+
(d) Li+ > K+ > Na+ > Rb+
Q2. Which of the following is formed as the main product when sodium burns in excess of air?
(a) Sodium oxide
(b) Sodium peroxide
(c) Sodium superoxide
(d) Sodium oxide and sodium nitrate
Q3. Which of the following alkaline earth metal does not impart characteristic colour to flame?
(a) Beryllium
(b) Calcium
(c) Barium
(d) None of the above
Q4. Which of the following alkaline earth metal has the smallest mobility in an aqueous solution?
(a) Magnesium ion
(b) Calcium ion
(c) Barium ion
(d) None of the above
Q5. Beryllium exhibits a diagonal relationship with ________.
(a) Boron
(b) Aluminium
(c) Magnesium
(d) None of the above
Q6. What is the chemical formula of Epsom salt?
(a) Na2 SO4. 10 H2O
(b) Mg SO4. 7 H2O
(c) Fe SO4. 7 H2O
(d) None of the above
Q7. Name a radioactive element of s-block elements.
Q8. Why is lithium hydride more stable than sodium hydride?
Q9. Name a group 1st element that floats on the water without any evident reaction.
Q10. Which of the following can be used to store an alkali metal?
Ethanol, Benzene, Water
Q11. What is the oxidation state of sodium in Na2O2?
Q12. Why can we not prepare potassium carbonate using Solvay’s process?
Q13. Why do beryllium and magnesium not give any characteristic colour to flame, whereas other alkaline metals do so?
Q14. Draw the structure of beryllium chloride in vapour and solid state.
Q15. Answer the following questions.
(a) Why is sodium more useful than potassium?
(b) Why does the electrolysis of their fused chloride prepare alkali metals?
Q16. Compare the stability and thermal stability of the following compounds of the alkali metals with those of alkaline earth metals.
(a) Carbonate
(b) Nitrate
(c) Sulphate
Q17. What is a diagonal relationship? Why does lithium differ from its family members but resemble magnesium?
Q18. Answer the following questions.
(a) Why is potassium oxide paramagnetic?
(b) Why does lithium form oxide, sodium form peroxide, while potassium and rubidium form superoxide?
(c) Why is barium oxide soluble in water, but barium sulphate is insoluble in water?
Q19. Explain the various reactions in Solvay’s process to manufacture sodium carbonate.
Q20. What is cement? What is its composition? How is it manufactured?
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Read Also:
- Peculiar Properties of Beryllium and Lithium
- Class 11 Chemistry Chapter 10 The s-Block Elements MCQs
- Important Questions for Class 11 Chemistry Chapter 10 – The s-Block Elements.
- CBSE Chemistry Practicals Class 11
- Chemistry Concept Questions and Answers
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