Elements in which the last electron enters the outermost s-subshell are called s-block elements. It may have one or two valence electrons. Elements with one valence electron are put in the modern periodic table’s first group and are named alkali metals. In contrast, elements with two valence electrons are placed in the periodic table’s second group and named alkaline earth metals.
Download Class 11 Chemistry Worksheet on Chapter 10 The s-Block Elements Set 4 PDF
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CBSE Class 11 Chemistry Chapter 10 The s-Block Elements Worksheet – Set 4
Q1. Which of the following is most stable?
(a) Beryllium carbonate
(b) Magnesium carbonate
(c) Strontium carbonate
(d) None of the above
Q2. Which of the following contains magnesium?
(a) Vitamin B12
(b) Chlorophyll
(c) Ascorbic acid
(d) None of the above
Q3. Which of the following is the chemical name and formula of quicklime?
(a) Calcium oxide (CaO)
(b) Calcium hydroxide [Ca(OH)2]
(c) Calcium carbonate [CaCO3]
(d) None of the above
Q4. Which of the following is formed when slaked lime reacts with chlorine?
(a) Calcium oxychloride
(b) Calcium oxide
(c) Calcium chloride
(d) None of the above
Q5. Which of the following is the by-product of the Solvay ammonia process?
(a) Calcium chloride
(b) Calcium carbonate
(c) Carbon dioxide
(d) None of the above
Q6. Which of the following has the largest solubility in water?
(a) Magnesium hydroxide
(b) Barium hydroxide
(c) Calcium hydroxide
(d) None of the above
Q7. Write the general configuration of s-block elements.
Q8. Why does the basic character of alkali metal hydroxide increase down the group?
Q9. Give the main reasons for the difference in properties of lithium and sodium.
Q10. Among the alkali metals, which element has the
(a) Highest melting point
(b) Most electropositive character
(c) Lowest ion size
(d) Strongest reducing character
Q11. Why is lithium hydride more stable than sodium hydride?
Q12. Why should we not extinguish sodium fire with water?
Q13. Can we dissolve sodium hydride in water?
Q14. Why are alkali metals good reducing agents?
Q15. Explain the extraction of sodium from sodium chloride.
Q16. What are the chemical formulae of the following ores?
(a) Dolomite
(b) Gypsum
(c) Epsom salt
(d) Carnallite
Q17. Why is it essential to add gypsum in the final stages of the preparation of cement?
Q18. Name the chief factors responsible for the abnormal behaviour of lithium.
Q19. Complete the following reactions.
(a) Mg(NO3)2 + Heat →
(b) LiOH + Heat →
(c) Li + HC ≡ CH →
(d) Na + O2 →
Q20. How do the following properties vary among the alkali metals?
(a) Atomic radius
(b) Ionisation energy
(c) Metallic character
Download the PDF to access answers to the Chemistry Worksheet for Class 11 Chemistry Chapter 10 The s-Block Elements Set – 4
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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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