Class 11 Chemistry The P-block Elements MCQs With Answers

Class 11 Chemistry The P-block Elements MCQs with Answers provide Sainik School aspirants with a targeted and effective tool for mastering essential concepts. Tailored to the class 11 chemistry syllabus, these multiple-choice questions focus on the pivotal topic of the P-block elements. With clear and concise answers, students can efficiently self-assess, identifying strengths and areas for improvement. A solid understanding of the P-block elements is vital 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 P-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. In the structure of diborane.

1. All hydrogen atoms lie in one plane and boron atoms lie in a plane perpendicular to this plane.
2. 2 boron atoms and 4 terminal hydrogen atoms lie in the same plane and 2 bridging hydrogen atoms lie in the perpendicular plane.
3. 4 bridging hydrogen atoms and boron atoms lie in one plane and two terminal hydrogen atoms lie in a plane perpendicular to this plane.
4. All the atoms are in the same plane.

Q2. B₂H₆ on heating with NH₃ gases gives:

1. B₃N₃H₆
2. B₂H₆.NH₃
3. H₆.3NH₃
4. B2N4H10

Q3. Catenation i.e., linking of similar atoms depends on size and electronic configuration of atoms. The tendency of catenation in Group 14 elements follows the order:

1. C > Si > Ge > Sn.
2. C >> Si > Ge ≈ Sn.
3. Si > C > Sn > Ge.
4. Ge > Sn > Si > C.

Q4. The reason for small radius of Ga compared to Al is _.

1. Poor screening effect of d and f orbitals.
2. Increase in nuclear charge.
3. Presence of higher orbitals.
4. Higher atomic number.

Q5. The element which exists in liquid state for a wide range of temperature and can be used for measuring high temperature is:

1. B.
2. Al.
3. Ga.
4. In.

Q6. Boric acid is an acid because its molecule.

1. Contains replaceable H⁺ ion.
2. Gives up a proton.
3. Accepts OH^– from water releasing proton.
4. Combines with proton from water molecule.

Q7. Which of the following has trigonal planar geometry?

Q8. Which of the following is not isostructural with SicI₄?

Q9.

Which of the following is a Lewis acid?                                                                                                                                                         

1. AlCl₃.
2. MgCl₂.
3. CaCl₂.
4. 4. BaCl₂.

Q10. Which of the following is a white crystalline solid, with soapy touch?

1. Borax.
2. Orthoboric acid.
3. Diborane.
4. None of these.

Q11. Cement, the important building material is a mixture of oxides of several elements. Besides calcium, iron and sulphur, oxides of elements of which of the group (s) are
present in the mixture?

1. Group 2
2. Groups 2, 13 and 14
3. Groups 2 and 13
4. Groups 2 and 14

Q12. Borax contains the tetranuclear units. Thus, its formula can be written as:

1. [Na₂B₄O₅(OH)₄].8H₂O
2. Na₂[B₄O₅(OH)₄].8H₂O
3. 3. [Na₂B₄O₅(OH)₆].6H₂O
4. 4. None of the above.

Q13. The type of hybridisation of boron in diborane is:

1. sp.
2. sp².
3. sp³.
4. dsp².

Q14. Carbon has a unique ability to form pit -pt:

1. Single bond,
2. Double bond,
3. Triple bond,
4. Multiple bond,

Q15. Which of the following has highest dipole moment?

1. NH₃
2. NCI₃
3. NF₃
4. CO₂