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 26 of 68
- A. P > Si > Cl
- B. Cl > P > Si
- C. Cl > Si > P
- D. Si > P > Cl
Explanation: The correct order of electron affinities is Cl > Si > P. Chlorine has the highest electron affinity because it is a halogen and tends to…
Correct answer: Cl > Si > P- A. Cl > Si > Na > Ar
- B. Si > Cl > Na > Ar
- C. Cl > Na > Si > Ar
- D. Cl > Si > Ar > Na
Explanation: The electron affinity of an element is the energy change that occurs when an electron is added to a neutral atom.
Correct answer: Cl > Si > Na > Ar- A. F > Cl > Br > I
- B. Cl > F > Br > I
- C. Cl > Br > I > F
- D. Cl > Br > F > I
Explanation: The correct order of electron affinities for halogens is Cl > F > Br > I.
Correct answer: Cl > F > Br > I- A. Li+
- B. Na+
- C. Mg2+
Explanation: The ionic radius is determined by the balance between the number of electron shells and the effective nuclear charge.
Correct answer: Na+- A. Mg++
- B. Na+
- C. Ar
- D. Kr
Explanation: The Ca++ ion is formed when a calcium atom loses two electrons. The electron configuration of Ca is 1s2 2s2 2p6 3s2 3p6 4s2.
Correct answer: Ar- A. Alkali metals
- B. Transition metals
- C. Halogens
- D. Inert gases
Explanation: The correct answer is Option D: Inert gases. Inert gases, also known as noble gases, have a complete valence electron shell, which makes…
Correct answer: Inert gases- A. Carbon
- B. Silicon
- C. Lead
- D. Tin
Explanation: Electronegativity is a trend that increases as you move across a period from left to right in the periodic table.
Correct answer: Carbon- A. F
- B. Cl
- C. Br
- D. I
Explanation: Chlorine has the highest electron affinity among halogens because it strikes a balance between nuclear attraction and electron cloud size.
Correct answer: Cl- A. Atomic radius
- B. Ionization energy
- C. N/P ratio
- D. Electron affinity
Explanation: The correct answer is N/P ratio. The periodicity in elements refers to the repeating pattern of chemical properties observed in elements…
Correct answer: N/P ratio- A. Se
- B. Ge
- C. Sb
- D. Te
Explanation: The correct answer is Sb (Antimony). Phosphorus (P) is in group 15 of the periodic table, known as the nitrogen group or pnictogens.
Correct answer: Sb- A. F
- B. P
- C. Br
- D. Cl
Explanation: The correct answer is Cl. Chlorine, located in the third period and group 17 of the periodic table, is the most electronegative element in…
Correct answer: Cl- A. C, N, Si, P
- B. N, Si, C, P
- C. Si, P, C, N
- D. P, Si, N, C
Explanation: Electronegativity is the tendency of an atom to attract a bonding pair of electrons.
Correct answer: Si, P, C, N- A. Oxygen
- B. Nitrogen
- C. Fluorine
- D. Astatine
Explanation: Fluorine is the most electronegative element in the periodic table because it is at the top right corner, excluding the noble gases.
Correct answer: Fluorine- A. Average of first and second ionisation energies
- B. Average of first and second electron affinities
- C. Average of ionisation energy and electron affinity
- D. None of the above
Explanation: The Mulliken scale of electronegativity calculates the tendency of an atom to attract electrons by averaging its ionisation energy and…
Correct answer: Average of ionisation energy and electron affinity- A. F > O > N > C
- B. F > O > C > N
- C. C > N > O > F
- D. C > O > N > F.
Explanation: Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.
Correct answer: F > O > N > C- A. F2
- B. I2
- C. Br2
- D. Cl2
Explanation: The strongest oxidizing agent is the one that has the greatest ability to accept electrons.
Correct answer: F2- A. Transition elements
- B. Inert gases
- C. Normal elements
- D. Non-metallic elements
Explanation: Transition elements are characterized by their ability to form multiple oxidation states due to the participation of their d-orbitals in…
Correct answer: Transition elements- A. Ionization enthalpy
- B. Electronegativity
- C. Electron affinity
- D. Atomic size.
Explanation: The correct answer is Atomic size. As you move down a group in the periodic table, the number of electron shells increases, which results…
Correct answer: Atomic size.- A. 102
- B. 101
- C. 111
- D. 110
Explanation: The element Uuu refers to Unununium, a placeholder name used by IUPAC for the element with atomic number 111, which is now known as…
Correct answer: 111- A. Group IA
- B. Group IB
- C. Group VIIA
- D. Group VIII
Explanation: The correct answer is Group IA. Elements in Group IA are alkali metals, which are characterized by their low ionization energy and low…
Correct answer: Group IA