Class 11 S-block Elements with Answers

Class 11 Chemistry S-block Elements with Answers

Class 11 Chemistry The S-block Elements MCQs with Answers offer Sainik School aspirants a focused and effective resource for mastering essential concepts. Tailored to the class 11 chemistry syllabus, these multiple-choice questions emphasize the crucial topic of the S-block elements. With clear and concise answers, students can efficiently self-assess, identifying strengths and areas for improvement. A thorough understanding of the S-block elements is essential for success, and these MCQs ensure comprehensive comprehension of key principles.

As students prepare for Sainik School entrance exams, practicing these MCQs not only enhances exam readiness but also sharpens analytical and problem-solving skills. The content aligns with the broader goals of Sainik School education, emphasizing a holistic understanding of the S-block elements’ principles. This resource serves as a strategic tool, helping students build a strong foundation for future academic endeavors and meet the specific requirements of Sainik School examinations.

Q1. Which of the following element is present in excess amount in human bones and teeth?

  1. Sodium.
  2. Potassium.
  3. Calcium.
  4. Carbon.
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Ans: 3. Calcium.
Explanation:
Calcium is present in human body in bones and teeth. About 99% of body calcium is present in bones and teeth.

Q2. Suspension of slaked lime in water is known as:

  1. Lime water.
  2. Quick lime.
  3. Milk of lime.
  4. Aqueous solution of slaked lime.
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Ans: 3. Milk of lime.

Q3. Alkali metals are generally silvery white but beryllium and magnesium appears to be:

  1. Reddish.
  2. Grayish.
  3. Yellowish.
  4. None of these.
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Ans: 2. Grayish.
Explanation:
Alkaline earth metals are generally silvery white but Be and Mg appears tobe greyish in colour

Q4. Percentage of CaO present in Portland cement is:

  1. 50-60%
  2. 70-80%
  3. 90%
  4. 40%
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Ans: 1. 50-60%

Q5. Powder of beryllium burns in air frequently to produce:

  1. BeO
  2. Be3N2
  3. Be2O
  4. Both (a) and (b)
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Ans: 4. Both (a) and (b)

Q6. Potassium ions are most abundant in the cell fluid. Which of the following reaction is performed by the potassium
ion present in them?

  1. They perform oxidation of glucose to ATP.
  2. They perform nerve signals transmission.
  3. Both (a) and (b) are true.
  4. None of the above.
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Ans: 3. Both (a) and (b) are true

Q7. Which of the following is the nearest base?

  1. Ca(OH)2
  2. KOH
  3. LiOH
  4. Sr(OH)2
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Ans:3. LiOH

Q8. The second ionisation enthalpy of the alkaline earth metals are smaller than that of corresponding group I metals.
This is due to:

  1. Large size of alkali metals.
  2. Stable configuration of alkali metal ions.
  3. Small size of alkaline earth metals.
  4. Stable configuration of alkaline earth metal monocation.
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Ans: 2. Stable configuration of alkali metal ions.

Q9. The product recycled during Solvay process is/ are:                                                             

  1. CO2
  2. NH3
  3. NaCl
  4. Both (a) and (b)
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Ans:4. Both (a) and (b)

Q10. Several sodium compounds find use in industries. Which of the following compounds are used for textile
industry?

  1. Na2CO3
  2. NaHCO3
  3. NaOH
  4. NaCl
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Ans:1. Na2CO3.

3. NaOH.

Q11. The reducing power of a metal depends on various factors. Suggest the factor which makes Li, the strongest
reducing agent in aqueous solution.

  1. Sublimation enthalpy.
  2. Ionisation enthalpy.
  3. Hydration enthalpy.
  4. Electron-gain enthalpy.
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Ans: 3. Hydration enthalpy.
Explanation:
Lithium has highest hydration enthalpy which accounts for its high negative E° value and its high reducing power.

Q12. The low melting point of alkali metals is due to:

  1. Weak metallic bonding.
  2. Presence of only one valence electron.
  3. Lower density.
  4. Both (a) and (b).
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Ans: 4. Both (a) and (b).

Q13. Metals form basic hydroxides. Which of the following metal hydroxides is the least basic?

  1. Mg(OH)2
  2. Ca(OH)2
  3. Sr(OH)2
  4. Ba(OH)2
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Ans.1.Mg(OH)2

Q14. Which of the carbonates given below is unstable in air and is kept in CO2 atmosphere to avoid decomposition.

  1. BeCO3
  2. MgCO3
  3. CaCO3
  4. BaCO3
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Ans.1.BeCO3

Q15. Along the group of alkali metals, the density:

  1. Decreases from top to bottom.
  2. Increases from top to bottom.
  3. Remains the same.
  4. Follow a irregular trend.
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Ans: 2. Increases from top to bottom.

Q16. The alkali metal halide soluble in pyridine is:

  1. NaCl
  2. LiCl
  3. KCl
  4. Csl
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Ans: 2. LiCl
Explanation:
LiCl is soluble in pyridine because it is covalent

FAQs

Q: How do Class 11 Chemistry The S-block Elements MCQs with Answers contribute to effective exam preparation for Sainik School aspirants?

A: Engaging with The S-block Elements MCQs designed for class 11 ensures Sainik School candidates have a focused study resource. These questions cover essential concepts related to S-block elements and provide clear answers, facilitating efficient self-assessment. By practicing these MCQs, students not only reinforce their understanding but also develop strong problem-solving skills, crucial for success in the competitive Sainik School entrance exams. The focus on the S-block elements aligns with the curriculum, ensuring that aspirants are well-prepared for the specific content they will encounter in the examinations.

Q: How does the inclusion of Class 11 Chemistry The S-block Elements MCQs support a comprehensive education approach at Sainik School?

A: Integrating The S-block Elements MCQs into the study material reflects Sainik School’s commitment to holistic education. Beyond exam preparation, these questions foster a deeper understanding of S-block elements’ principles, contributing to a well-rounded education. The clear answers provided not only help in grasping theoretical concepts but also promote effective problem-solving skills. This aligns with Sainik School’s broader goal of nurturing individuals with a comprehensive academic foundation, ensuring that students are not only successful in the entrance exams but also well-equipped for future academic pursuits.

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