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 24 of 68
- A. s-block
- B. p-block
- C. s and p-block
- D. d-block
Explanation: The main block elements of the periodic table are those found in the s and p blocks.
Correct answer: s and p-block- A. 16
- B. 12
- C. 14
- D. 2
Explanation: The element with atomic number 82 is lead (Pb), which is located in Group 14 of the periodic table.
Correct answer: 14- A. Fourth period
- B. Fifth period
- C. Third period
- D. Sixth period
Explanation: The periodic table is organized into periods, which are horizontal rows. Each period corresponds to a range of atomic numbers.
Correct answer: Fifth period- A. Group 1
- B. Group 2
- C. Group 17
- D. Group 18
Explanation: In a given period, the atomic volume generally decreases from left to right due to increasing effective nuclear charge, which pulls the…
Correct answer: Group 1- A. Increases regularly
- B. Decreases regularly
- C. First decreases and then increases
- D. Remains almost constant
Explanation: The correct answer is that the gram atomic volume first decreases and then increases as we move from left to right in Period 3.
Correct answer: First decreases and then increases- A. Na, K, Rb, Cs
- B. Na, Mg, Al, Si
- C. Fe, Co, Ni, Cu
- D. F, Cl, Br, I
Explanation: The correct answer is Option C: Fe, Co, Ni, Cu. These elements are transition metals located in the same period in the periodic table.
Correct answer: Fe, Co, Ni, Cu- A. K+
- B. Ca2+
- C. Ti3+
- D. Ti4+
Explanation: The ionic radius of an ion depends on the number of electrons and the charge of the ion.
Correct answer: Ti4+- A. Mg2+
- B. Na+
- C. Li+
- D. H+
Explanation: Be2+ is isoelectronic with Li+ because both ions have the same number of electrons, which is 2.
Correct answer: Li+- A. Group 1
- B. Group 18
- C. Group 4
- D. Group 14
Explanation: The elements corresponding to peaks in the graph of atomic volume versus atomic weight typically belong to Group 1, the alkali metals.
Correct answer: Group 1- A. S2- < P3- < Cl- < K+
- B. Cl- > S2- > P3- > K+
- C. K+ > Cl- > S2- > P3-
- D. P3- > S2- > Cl- > K+
Explanation: The correct order of ionic radii is P3- > S2- > Cl- > K+. The size of an ion is affected by its electron count and nuclear charge.
Correct answer: P3- > S2- > Cl- > K+- A. C > N > F > O
- B. C > N > O > F
- C. F > O > N > C
- D. N > C > O > F
Explanation: As you move across a period from left to right in the periodic table, atomic volumes generally decrease due to the increasing nuclear…
Correct answer: C > N > O > F- A. Neon
- B. Argon
- C. Krypton
- D. Xenon
Explanation: The ions Sc3+, Ca2+, and K+ all lose electrons to achieve a noble gas electronic configuration.
Correct answer: Argon- A. F-
- B. Cl-
- C. Br-
- D. I-
Explanation: The size of an ion generally increases as you move down a group in the periodic table because additional electron shells are added.
Correct answer: F-- A. I
- B. Cl
- C. Br
- D. F
Explanation: Fluorine (F) is the most electronegative element in the periodic table, which means it has a strong tendency to gain electrons rather than…
Correct answer: F- A. Li
- B. Be
- C. B
- D. C
Explanation: The electropositivity of an element is related to its ability to donate electrons and form positive ions.
Correct answer: Li- A. F-
- B. O2-
- C. Na+
- D. Ca2+
Explanation: Neon has an atomic number of 10, meaning it has 10 electrons. The ions F-, O2-, and Na+ all have electron configurations of 10 electrons…
Correct answer: Ca2+- A. Li+ < Na+ < K+ < Rb+
- B. Li+ > Na+ > K+ > Rb+
- C. Li+ = Na+ = K+ = Rb+
- D. Rb+ > Na+ > K+ > Li+.
Explanation: The correct order of ionic radii for alkali metal ions is Li+ < Na+ < K+ < Rb+.
Correct answer: Li+ < Na+ < K+ < Rb+- A. Na
- B. K
- C. Li
- D. Ca
Explanation: The correct answer is Li. Lithium is the strongest reducing agent in aqueous solution due to its high hydration energy.
Correct answer: Li- A. CO2
- B. CO
- C. BeO
- D. N2O5
Explanation: The correct answer is N2O5 because it is an acidic oxide that forms nitric acid when dissolved in water.
Correct answer: N2O5- A. Mg
- B. Rb
- C. Li
- D. Ca
Explanation: The first ionization energy is the energy required to remove the outermost electron from a gaseous atom.
Correct answer: Rb