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OJEE p-Block Elements — practice questions

Explore 68 free p-Block Elements questions in OJEE Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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p-Block Elements questions and exercises with answers

Showing questions 1–30 of 68.

p-block elements are those whose:Read the answer and worked solution →Group 17 elements are called:Read the answer and worked solution →Most electronegative element in periodic table:Read the answer and worked solution →Boron family (group 13) elements:Read the answer and worked solution →Hybridization in BF₃:Read the answer and worked solution →NH₃ shape:Read the answer and worked solution →SF₆ shape:Read the answer and worked solution →In ozone (O₃), bond order is:Read the answer and worked solution →Hybridization of S in SO₂:Read the answer and worked solution →Inert pair effect causes stability of:Read the answer and worked solution →Oxidation state of Cl in HClO₄ (perchloric acid):Read the answer and worked solution →Reaction of XeF₂ with water:Read the answer and worked solution →Number of P-O-P bridges in P₄O₁₀:Read the answer and worked solution →Ionization enthalpy comparison: O vs F. The 1st IE of O is LESS than that of N (because O has paired 2p electron easier to remove). Similarly:Read the answer and worked solution →PCl₅ in gas phase has shape:Read the answer and worked solution →Which halogen liberates Cl₂ from solution of Cl⁻?Read the answer and worked solution →NEET · Chemistry · Tap the HalogensRead the answer and worked solution →NEET · Chemistry · Tap Noble GasesRead the answer and worked solution →Order the atomic models as they were proposedRead the answer and worked solution →Match each scientist to their modelRead the answer and worked solution →Match each model to what it could NOT explainRead the answer and worked solution →True or false: Rutherford's modelRead the answer and worked solution →True or false: Bohr's modelRead the answer and worked solution →Complete the reason Bohr's model failsRead the answer and worked solution →Which model does this belong to?Read the answer and worked solution →Match each quantum number to what it is calledRead the answer and worked solution →True or false: the quantum mechanical modelRead the answer and worked solution →Order the structure: from atom down to electronRead the answer and worked solution →Complete the (n + l) ruleRead the answer and worked solution →True or false: orbital energiesRead the answer and worked solution →

Worked practice questions

p-block elements are those whose:

  1. f-orbital filled
  2. DIFFERENTIATING electron enters the p-subshell (groups 13-18)
  3. s-electron is the differentiating electron
  4. d-orbital filled
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Correct answer: B. DIFFERENTIATING electron enters the p-subshell (groups 13-18)

p-block: groups 13–18. Includes boron family (group 13), carbon family (14), nitrogen family (15), oxygen family (16), halogens (17), noble gases (18). Last electron in p-orbital.

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Group 17 elements are called:

  1. Halogens
  2. Chalcogens
  3. Alkali metals
  4. Noble gases
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Correct answer: A. Halogens

**Group 17:** F, Cl, Br, I, At — halogens (Greek 'salt-formers'). Diatomic molecules. Highly reactive nonmetals. Form -1 ions easily.

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Most electronegative element in periodic table:

  1. F (fluorine, 4.0 on Pauling scale)
  2. N
  3. O
  4. Cl
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Correct answer: A. F (fluorine, 4.0 on Pauling scale)

F is most electronegative (Pauling scale 4.0). **Other high values:** O (3.5), N (3.0), Cl (3.0). Decreasing across period? No — F highest. Increases left to right, decreases top to bottom.

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