NEET Chemistry: P- BLOCK ELEMENTS Practice Questions
15 free multiple-choice questions on P- BLOCK ELEMENTS for NEET Chemistry, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more P- BLOCK ELEMENTS questions in the app →Q1. As we move down a group in the p-block, the atomic radius generally tends to:
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Correct answer: D — increase
As the principal quantum number increases (moving down a group), the number of electron shells increases, leading to a general increase in atomic size.
Q2. Elements belonging to the d-block are collectively known as:
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Correct answer: D — Transition metals
The d-block elements are known as transition metals because their elements exhibit variable oxidation states and form colored compounds.
Q3. Which set of elements is generally classified as the P-block elements in the periodic table?
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Correct answer: A — p-block elements
The P-block elements include the s-block elements (Groups 1 and 2) and the elements filling the p-orbitals (Groups 13 to 18).
Q4. The general trend for the first ionization energy across a period (left to right) in the P-block is:
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Correct answer: A — Increases
As we move across a period, the effective nuclear charge increases, pulling the valence electrons closer, thus requiring more energy to remove an electron. Hence, ionization energy increases.
Q5. The elements in the p-block are primarily characterized by the presence of which type of orbital filling?
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Correct answer: D — p-orbital filling
The defining characteristic of the p-block elements is the occupation of the p-orbitals as the valence shell electrons.
Q6. Consider the general trend of electronegativity across the p-block elements. Which element possesses the highest electronegativity?
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Correct answer: A — O
Electronegativity generally increases across a period. Oxygen (O) is highly electronegative and is the most electronegative element in the p-block (excluding Noble gases).
Q7. Which element among the following has the electronic configuration ending in 3d¹⁰4s²?
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Correct answer: D — Calcium (Ca)
Calcium (Ca) has an atomic number of 20. Its electronic configuration is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s², which simplifies to [Ar] 4s² or 3d¹⁰4s² when considering the filled shell prior to the valence shell filling in the transition context, focusing on the configuration based on the preceding block structure. (Note: For P-block context, this tests configuration knowledge based on position).
Q8. The principal quantum number (n) of the valence shell for the elements in Group 15 (Pnictogens) is typically:
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Correct answer: B — n=3
For elements in the p-block, the valence electrons occupy the outermost p-orbital, which corresponds to the principal quantum number n=3 for the second period elements (like N, P, As, Sb, Bi).
Q9. In general, the elements in the P-block exhibit a greater tendency to form which type of bonds compared to elements in the s-block?
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Correct answer: B — Covalent bonds
Non-metals (which dominate the P-block) tend to form covalent bonds, while the s-block elements (metals) primarily form ionic or metallic bonds.
Q10. The element that typically ends the third period of the P-block is:
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Correct answer: D — Bromine
The third period ends with the p-block elements like Argon (Group 18), which is a non-metal, completing the filling of the third period.
Q11. The general electronic configuration for elements in the p-block is characterized by the filling of which type of orbital?
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Correct answer: B — p-orbitals
Elements in the p-block have their highest energy electrons occupying the p-orbitals, which determines their chemical properties.
Q12. Which block of the periodic table is characterized by elements whose outermost electrons occupy the p-orbitals?
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Correct answer: C — p-block
The p-block contains elements whose valence shell is filled by electrons in the p-orbitals.
Q13. Which orbital is the highest energy orbital that is typically filled with valence electrons in the P-block elements?
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Correct answer: C — p orbital
In the main group elements of the P-block, the valence electrons occupy the p-orbitals, which is the highest energy orbital being filled in the context of simple valence configuration trends.
Q14. According to the Aufbau principle, the order of filling for the orbitals is generally:
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Correct answer: D — 1s, 2s, 2p, 3s
The Aufbau principle dictates filling orbitals in order of increasing energy, which corresponds to the sequence 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, etc.
Q15. The elements of the P-block are primarily composed of which types of elements?
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Correct answer: C — Non-metals
The P-block includes s-block elements, p-block elements (like C, N, O, P), and some metalloids.
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