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Indian Navy 10+2 B.Tech Cadet p-Block Elements — practice questions

Explore 57 free p-Block Elements questions in Indian Navy 10+2 B.Tech Cadet 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 57.

Among the 3d-series transition metals, the element that exhibits the largest number of oxidation states is:Read the answer and worked solution →In ozone (O₃), bond order is:Read the answer and worked solution →What is the valency of an element with electronic configuration 2, 8, 3?Read the answer and worked solution →Which of the following elements does not lose an electron easily?Read the answer and worked solution →Arrange the following elements in the order of their decreasing metallic character Na, Si, Cl, Mg, AlRead the answer and worked solution →Arrange the following elements in the order of their increasing non-metallic character Li, O, C, Be, FRead the answer and worked solution →On moving from left to right in a period in the periodic table, the size of the atom.Read 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 →Match each rule to what it forbids or requiresRead the answer and worked solution →Tap every statement Hund's rule requiresRead the answer and worked solution →The fundamental particlesRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Which principle is being described?Read the answer and worked solution →Flip and pair: symbol with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Tap every statement true of the Schrodinger modelRead the answer and worked solution →Reading the models backRead the answer and worked solution →

Worked practice questions

Among the 3d-series transition metals, the element that exhibits the largest number of oxidation states is:

  1. Scandium (Sc)
  2. Iron (Fe)
  3. Manganese (Mn)
  4. Zinc (Zn)
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Correct answer: C. Manganese (Mn)

Manganese has the configuration $[\mathrm{Ar}]3d^5 4s^2$. All five 3d electrons and the two 4s electrons can participate in bonding so it can lose anywhere from one to seven electrons giving oxidation states $+2$ through $+7$. **Examples:** $\mathrm{Mn}^{2+}$ in $\mathrm{MnSO_4}$, $\mathrm{Mn}^{4+}$ in $\mathrm{MnO_2}$, $\mathrm{Mn}^{7+}$ in $\mathrm{KMnO_4}$.

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In ozone (O₃), bond order is:

  1. 1.5 (resonance between two equivalent structures)
  2. 2
  3. 1
  4. 3
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Correct answer: A. 1.5 (resonance between two equivalent structures)

O₃: 2 resonance structures, each with one single and one double bond. Average = 1.5. Bond length 127.8 pm (between single 148 pm and double 121 pm).

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What is the valency of an element with electronic configuration 2, 8, 3?

  1. Three
  2. Two
  3. Five
  4. Eight
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Correct answer: A. Three

1. The element has 3 electrons in the outermost shell. 2. Valency for groups 1-2 and 13 is the number of valence electrons. 3. With 3 valence electrons, the element gives a valency of 3. 4. So the valency is three. 5. The element is aluminium with atomic number 13. _Source: syllabus Science Ch 5 'Periodic Classification of Elements'_

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More Chemistry topics

Alcohols Phenols EthersOrganic ChemistryAlkenesPolymersChemical EquilibriumAtoms and MoleculesStates of MatterClassification of Elements