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.

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.

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

1. Reddish.
2. Grayish.
3. Yellowish.
4. None of these.

Q4. Percentage of CaO present in Portland cement is:

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

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

1. BeO
2. Be₃N₂
3. Be₂O
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.

Q7. Which of the following is the nearest base?

1. Ca(OH)₂

2. KOH
3. LiOH
4. Sr(OH)₂

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.

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

1. CO₂
2. NH₃
3. NaCl
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

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.

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).

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

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

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.

Q16. The alkali metal halide soluble in pyridine is:

1. NaCl
2. LiCl
3. KCl
4. Csl