Free s-Block and p-Block Elements MCQs with Answers
1,359 s-Block and p-Block Elements MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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1,359 questions · page 19 of 68
- A. 2H2O + NOCl + Cl2
- B. H2 + NOCl + 2HOCl
- C. H2O + NOCl + 2HCl
- D. 2H2O + NOCl + 2Cl
Explanation: The reaction of HNO3 with HCl in a 1:3 molar ratio forms aqua regia, generating water (H2O), nitrosyl chloride (NOCl), and chlorine gas…
Correct answer: 2H2O + NOCl + Cl2- A. Sodium carbonate
- B. Sodium bicarbonate
- C. Sodium hydroxide
- D. Sodium metal
Explanation: Down's cell is a method for obtaining sodium metal by the electrolysis of molten sodium chloride.
Correct answer: Sodium metal- A. Na2B2O7 . 10H2O
- B. Na2B4O7 . H2O
- C. Na2B4O7 . 10H2O
- D. Na2B2O5 . 10H2O
Explanation: The chemical formula of Tincal, also known as borax, is Na2B4O7 . 10H2O.
Correct answer: Na2B4O7 . 10H2O- A. I-A, V-A and VIII-A
- B. I-A, IV-A and VI-A
- C. I-A, II-A and VII-A
- D. I-A, IV-A and VII-A
Explanation: Hydrogen is unique in its periodic behavior but shows similarities to several groups.
Correct answer: I-A, IV-A and VII-A- A. Because of high melting point
- B. Because d-electrons of outer shell take part in bonding
- C. Because s-electrons of outer shell take part in bonding
- D. Both s and d electrons takes part in bonding
Explanation: The toughness of these metals indicates strong metallic binding. This is because, apart from s-electrons of the outermost shell, the…
Correct answer: Both s and d electrons takes part in bonding- A. A compound in which a metal atom or ion is covalently bonded with a group of neutral molecules or anions.
- B. A compound that contains 2 or more than 2 different elements
- C. A compound which has complex molecular geometry
- D. A compound that contains a complex ion and can exist independently
Explanation: A coordination complex is the product of a Lewis acid-base reaction in which neutral molecules or anions (called ligands) bond to a…
Correct answer: A compound in which a metal atom or ion is covalently bonded with a group of neutral molecules or anions.- A. Outermost s orbital and p orbitals
- B. Outermost d orbital and underlying half filled f-orbitals
- C. Outermost p orbital and underlying half filled d-orbitals
- D. Outermost s orbital and underlying half filled d-orbitals
Explanation: Outermost s orbitals and underlying half filled d orbitals take part in binding of transition elements.
Correct answer: Outermost s orbital and underlying half filled d-orbitals- A. Na
- B. K
- C. Mg
- D. Al
Explanation: In general, ionisation enthalpy increases across the period (left to right) on account of the increase of effective nuclear charge while…
Correct answer: K- A. F
- B. Cl
- C. Br
- D. I
Explanation: F has maximum non-metallic character among the given non-metals.
Correct answer: F- A. F, S and Li
- B. Cl, S and Li
- C. Cl, Se and Na
- D. F, Se and Na
Explanation: In the periodic table, electron affinity generally increases across a period and decreases down a group.
Correct answer: Cl, S and Li- A. Increase in atomic mass
- B. Increase in shielding effect of the intervening electrons
- C. Increase in proton number
- D. Decrease in atomic size
Explanation: Ionization energy is the energy required to remove an electron from the outermost shell of the atom.
Correct answer: Increase in shielding effect of the intervening electrons- A. Atomic radius
- B. Ionization energy
- C. Ionic radius
- D. Hydration energy
Explanation: Polarizability usually refers to the tendency of matter, when subjected to an electric field, to acquire an electric dipole moment in…
Correct answer: Atomic radius- A. Down the Group
- B. Across the Period
- C. Along the d-block
- D. All of these
Explanation: The covalent character 'decreases in groups' as we go from top to bottom.
Correct answer: Down the Group- A. Nuclear charge
- B. Number of electrons
- C. Atomic number
- D. All of these
Explanation: In general, ionization energy increases across a period and decreases down a group.
Correct answer: Nuclear charge- A. 3.4
- B. 4.0
- C. 1.2
- D. 2.6
Explanation: Of the main group elements, fluorine has the highest electronegativity (EN = 4.0), and cesium has the lowest electronegativity (EN =…
Correct answer: 4.0- A. Nitrogen and Phosphorus
- B. Neon and Argon
- C. Lithium and Sodium
- D. Carbon and Silicon
Explanation: So in periods two and three, the highest melting point elements tend to be the metal elements with the most delocalized electrons.In…
Correct answer: Carbon and Silicon- A. Acidity of metal
- B. Polarization power
- C. Basicity of metal
- D. None of these options is correct
Explanation: Metals in lower oxidation states form more ionic and hence more basic oxides/hydroxides,while metals in higher oxidation states form more…
Correct answer: Basicity of metal- A. Group 2A
- B. Group 5A
- C. Both A & B
- D. None of these
Explanation: Correct option is C. Elements in group 2 of the periodic table do not have a high electron affinity.
Correct answer: Both A & B- A. Nuclear charge
- B. Proton number and nuclear charge
- C. Proton number
- D. None of the above
Explanation: Down the group, ionization energy decreases. Even though an increase in nuclear charge should cause an increase in ionization energy, an…
Correct answer: Proton number and nuclear charge- A. Mg²⁺
- B. Na
- C. Al³⁺
- D. Na⁺
Explanation: The size of an ion depends on two factors: its parent atomic size and the charge on the ion.
Correct answer: Al³⁺