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 54 of 68
- A. Down the Group
- B. Along the period
- C. Diagonally
- D. Only along the d-block
Explanation: As you go down the group, the period number increases, thus a new subshell is added.This leads to an increased shielding effect as more…
Correct answer: Down the Group- A. Absorbs CO2 and increases O2 content
- B. Eliminates moisture
- C. Absorbs CO2
- D. Produces ozone
Explanation: Potassium superoxide (KO2) plays a vital role in environments like space and submarines by regenerating breathable air.
Correct answer: Absorbs CO2 and increases O2 content- A. F<K<Li
- B. F<LI<Na<K
- C. Li<Na<K<F
- D. Na<K<Li<F
Explanation: The correct order of atomic radii is F < Li < Na < K. Fluorine (F) has the smallest atomic radius due to its position on the extreme right…
Correct answer: F<LI<Na<K- A. Ionisation energy
- B. Shielding effect
- C. Inert pair effect
- D. Both A. and B.
Explanation: The correct answer is Option D:Both A. and B.Atomic size increases down the group due to (i) Increase in the number of shells, and (ii)…
Correct answer: Both A. and B.- A. An acid
- B. A base
- C. A metallic anhydride
- D. A basic anhydride
Explanation: Metal oxides, such as calcium oxide, are known as basic anhydrides because they react with water to produce bases.
Correct answer: A base- A. They conduct electricity in molten state
- B. They are used as reducing agents
- C. They give H2 from H2O
- D. They are covalent in nature
Explanation: Saline hydrides (also known as ionic hydrides or pseudohalides) are compounds form between hydrogen and the most active metals, especially…
Correct answer: They are covalent in nature- A. Alkaline earth metal
- B. Alkali Metal
- C. Outer transition metal
- D. Inner transition metal
- E. None of the above
Explanation: If X is a halogen this means X has an oxidation of -1. Since the compound formed when X reacts with halogen to form MX, the M has an…
Correct answer: Alkali Metal- A. Acidic
- B. Alkaline
- C. Both Acidic and Alkaline
- D. Neutral
- E. None of these
Explanation: Sodium carbonate (Na2CO3), commonly known as washing soda, dissociates in water to form sodium ions (Na+) and carbonate ions (CO32-).
Correct answer: Alkaline- A. H+>H>H-
- B. H>H->H+
- C. H->H>H+
- D. H>H+>H
Explanation: Cationic radius > Atomic radius > Anionic radius. The correct answer is C) H- > H > H+. The correct order of radii is H- > H > H+.
Correct answer: H->H>H+1070. The greater 1st ionization energy would be associated with which of the following configuration
- A. 1s2 2s2 2p6 3s1
- B. 1s2 2s2 2p3
- C. 1s2 2s2 2p5
- D. 1s2 2s2 2p6
Explanation: The correct answer is D) 1s^2 2s^2 2p^6. Neon (Ne) has the greatest 1st ionization energy among the given configurations as it requires…
Correct answer: 1s2 2s2 2p6- A. [Ne] 3s2 3p1
- B. [Ne] 3s2 3p2
- C. [Ne] 3s2 3p3
- D. [Ne] 3s2 3p4
Explanation: The element with the highest ionization energy is fluorine (F) with the electron configuration [Ne] 3s2 3p3.
Correct answer: [Ne] 3s2 3p3- A. Oxygen
- B. Bromine
- C. Fluorine
- D. Carbon
Explanation: Fluorine has the highest electronegativity value of 3.98, making it the correct answer.
Correct answer: Fluorine- A. Middle East
- B. south-western Asia and northern Africa
- C. from the Mediterranean to
- D. the Arabian peninsula.
Explanation: It should be "The Middle East".The corrected sentence is: The Middle East is an extensive area of southwestern Asia and northern Africa…
Correct answer: Middle East1074. Spot the error. I, you, and he have been nominated for the special award in the field of academics.
- A. I, you, and he
- B. for
- C. in
- D. academics
Explanation: This is wrong sequence it should be He, you and I instead of I you and He
Correct answer: I, you, and he- A. Complicated by
- B. Exhausted with
- C. Obscured by
- D. Saturated with
Explanation: The word "saturated" most accurately indicates the density of the oxygen in the room.
Correct answer: Saturated with- A. 'Yes.' he said 'and I always keep my promises.'
- B. 'Yes,' he said. 'And I always keep my promises.'
- C. 'Yes.' he said! 'and I always keep my promises.'
- D. Yes.' he said. 'And I always keep my promises.'
Explanation: The correct sentence is: Yes, he said. 'And I always keep my promises'.
Correct answer: 'Yes,' he said. 'And I always keep my promises.'- A. Definitely true
- B. Probably true
- C. Data inadequate
- D. Probably false
- E. Definitely false
Explanation: The correct answer is 'Definitely true'. The passage clearly states that the mangoes are of premium quality and highlights the…
Correct answer: Definitely true- A. 15
- B. 16
- C. 25
- D. 13
Explanation: This is the correct total count of rectangles and squares found by methodically analyzing each part of the figure.
Correct answer: 15- A. Statement I is the cause and statement II is its effect
- B. Statement II is the cause and statement I is its effect
- C. Both the statements I and II are independent causes
- D. Both the statements I and II are effects of independent causes
Explanation: Remarkable growth in the national economy (Statement II) is the cause. This growth leads to increased incomes and opportunities, which in…
Correct answer: Statement I is the cause and statement II is its effect- A. If only I is most appropriate
- B. If only II is most appropriate
- C. If either I or II is most appropriate
- D. If neither I nor II is most appropriate
Explanation: A complaint of corruption requires immediate and decisive action. Waiting for more complaints (Action II) could allow the corruption to…
Correct answer: If only I is most appropriate