Class 11 S-Block Elements MCQs With Answer

We have compiled the NCERT MCQ Questions for Class 11 Chemistry Chapter 11 The p-Block Elements with Answers Pdf free download covering the entire syllabus. Practice MCQ Questions for Class 11 Chemistry with Answers daily and score well in exams. Refer to the p-Block Elements Class 11 MCQs Questions with Answers here along with a detailed explanation.

Class 11 Chemistry S-Block Elements MCQs With Answer

Q1. Which of the following are the correct reasons for the anomalous behavior of lithium?

1. Exceptionally small size of its atom.
2. Its high polarizing power.
3. It has high degree of hydration.
4. Exceptionally low ionization enthalpy.

Q3. The most correct reason for the colour of the flame due to alkali metal ions is:

1. Presence of single valence electron.
2. Excitation of valence electron.
3. Emission of radiation in visible region when electron come back to the ground state energy level.
4. None of the above.

Q5. By adding gypsum to cement:

1. Setting time of cement becomes less.
2. Setting time of cement increases.
3. Colour of cement becomes light.
4. Shining surface is obtained.

Q8. Gypsum on heating about 120 C forms a compound. What is the mass of water of crystallisation in compound
obtained?

1. 18
2. 36
3. 42
4. 9

Q10. Which of the following element(s) form stable superoxide?

1. K
2. Rb
3. Cs
4. All of these

Q11. The property of alkaline earth metals that increases with their atomic number is:

1. Electronegativity.
2. Solubility of their hydroxides in water.
3. Solubility of their sulfates in water.
4. Ionesation erthalpy.

Q12. The element responsible for neuromuscular function:

1. Ca
2. Mg
3. K
4. Na

Q13. Which of the following does not have rock salt type structure?

1. Mgo
2. BeO
3. BaO
4. CaO

Q14. Along the group and the period, atomic and ionic radii respectively:

1. Increases and decreases.
2. Decreases and increases.
3. Decreases and decreases.
4. Both remain constant.

Q15. Melting and boiling point of the alkaline earth metals are higher than the corresponding alkali metals due to:

1. Smaller size.
2. Larger size.
3. Same size.
4. Moderate size.

Q16. Which of the following elements does not form hydride by direct heating with dihydrogen?

1. Be
2. Mg
3. Sr
4. Ba

Q17. A substance which gives brick red flame and breaks down on heating to give oxygen and brown gas is:

1. Magnesium nitrate.
2. Calcium nitrate.
3. Barium nitrate.
4. Strontium nitrate.

Q18

Q19. Which of the following is/are characteristic(s) of baking soda?

1. It is used as an antiseptic for skin infections.
2. It is used as fire extinguisher.
3. It is used in preparation of cakes and bakery product.
4. All of the above are correct.

Q20.

Q21. Which of the following properties of hydroxides of alkaline earth metals increases from top to bottom?

1. Thermal stability.
2. Basic character.
3. Solubility in water.
4. All of these.

Q22.

Q23.

Q24. Which of the following is/ are present as impurity in crude sodium chloride?

1. Magnesium chloride.
2. Calcium chloride.
3. Sodium sulphate.
4. All of the above.

Q25. In context of Be, which one of the following statement is incorrect?

1. It is rendered passive be HNO₃ .
2. It form Be₂ C.
3. Its salts rarely hydrolyse.
4. Its hydride is electron deficient and polymeric.