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 59 of 68
- A. Electronic configuration of valence shell electrons
- B. Show allotropy
- C. Polymeric
- D. Show the same oxidation state
Explanation: Oxygen and sulfur indeed resemble each other in many ways, including having the same electronic configuration in their valence shell…
Correct answer: Polymeric- A. N2O (nitrous oxide)
- B. NO3- (nitrate ion)
- C. HNO2 (nitrous acid)
- D. HNO3 (nitric acid)
Explanation: Nitrogen has an oxidation state of +5 in HNO3:Oxygen typically has an oxidation state of -2.Hydrogen has an oxidation state of…
Correct answer: HNO3 (nitric acid)- A. HF
- B. HCl
- C. HBr
- D. HI
Explanation: While HF is the weakest acid in water among the given options, it's important to remember that it's still a highly corrosive and dangerous…
Correct answer: HF- A. Ca and P
- B. S and P
- C. Ca and S
- D. It is not used for this purpose
Explanation: Gypsum is applied to soil for Ca and S. Gypsum is a moderately soluble source of the essential plant nutrients, calcium and sulfur, and…
Correct answer: Ca and S1165. Metals are _?
- A. Reducing agents
- B. Oxidizing agents
- C. Both a and b
- D. Dehydrating agents
Explanation: A substance that tends to bring about reduction by being oxidized and losing electrons is reducing agentMetals lose electrons when they…
Correct answer: Reducing agents- A. Triggers hydration
- B. Triggers hydrolysis
- C. Prevents rapid hardening
- D. All of the above options are correct
Explanation: Portland cement is made by strongly heating a finely powdered mixture of clay and limestone.
Correct answer: Prevents rapid hardening- A. S2O72-, S2O32-
- B. S4O62-, S2O72-
- C. S2O72-, S2O82-
- D. S4O62-, S2O32-
Explanation: The image below shows the Lewis structures of each of the ions. Only the ions in Option D both contain an S-S bond.
Correct answer: S4O62-, S2O32-- A. O
- B. F
- C. Na
- D. N
Explanation: Na has the largest second ionization energy as the second electron is removed from an inner shell, thus the nuclear charge acting on it is…
Correct answer: Na- A. Na3AlF6
- B. Al2O3.nH2O
- C. Al2O3
- D. Al2O3.2H2O
Explanation: The chief ore of aluminium is bauxite, with the chemical formula Al2O3.2H2O.
Correct answer: Al2O3.2H2O- A. BeCO3 is preserved in an atmosphere of CO2 as it is thermally least stable.
- B. BeF2 forms a complex compound with excess NaF, in which the complex entity containing Be, is a cation.
- C. Beryllium dissolves in an alkali to form [Be(OH)4]2-
- D. Beryllium exhibits no diagonal relationship with sodium.
Explanation: Option B is correct.Beryllium fluoride (BeF2) forms a complex compound with excess sodium fluoride (NaF), in which the complex entity…
Correct answer: BeF2 forms a complex compound with excess NaF, in which the complex entity containing Be, is a cation.1171. The chemical composition of slag formed during the smelting process in the extraction of copper is:
- A. Cu2O + FeS
- B. FeSiO3
- C. CuFeS2
- D. Cu2S + Fe
Explanation: Option B is correct. The chemical composition of the slag formed during the smelting process in the extraction of copper is ferrous…
Correct answer: FeSiO3- A. Calamine is an ore of Cu
- B. Dolomite is an ore of Mg
- C. Stannite is an ore of Sn
- D. Cerussite is an ore of Pb
Explanation: The correct answer is option A: Calamine is an ore of zinc with the formula ZnCO3.
Correct answer: Calamine is an ore of Cu- A. Al2O3
- B. ZnO
- C. CaO
- D. PbO
Explanation: CaO (Calcium oxide) is not amphoteric; it is a basic oxide that reacts with acids.
Correct answer: CaO- A. Carbon is a non-metal while silicon is a semi-metal
- B. CO₂ is an independent molecule while SiO₂ has a network covalent structure
- C. Carbon forms multiple bonds while silicon does not form multiple bonds
- D. Silicon has all sigma bonds
Explanation: The physical states of CO₂ and SiO₂ at room temperature are primarily determined by their molecular structures.
Correct answer: CO₂ is an independent molecule while SiO₂ has a network covalent structure- A. It combines with H₂O to form carbonic acid
- B. It is a slightly polar molecule
- C. It is a powerful oxidizing agent
- D. It is used to prepare aerated drinks
Explanation: The correct answer is that carbon monoxide (CO) is a slightly polar molecule.
Correct answer: It is a slightly polar molecule- A. H₂SiO₃
- B. H₂SiO₄
- C. H₃AsO₄
- D. H₂SO₄
Explanation: Metasilicic acid has the formula H₂SiO₃, derived from orthosilicic acid by losing one water molecule.
Correct answer: H₂SiO₃- A. Fr
- B. Cs
- C. Rb
- D. Ra
Explanation: Ra (Radium) is correct because it is not an alkali metal. Radium is an alkaline earth metal, belonging to Group 2 of the periodic table.
Correct answer: Ra- A. Ca
- B. Cr
- C. Both of these metals
- D. None of these metals
Explanation: Caesium does not bear resemblance with either calcium or chromium. It has its own distinct properties as an alkali metal, separate from…
Correct answer: None of these metals- A. B
- B. K
- C. Al
- D. Cu
Explanation: s-block comprises 14 elements namely hydrogen (H), lithium (Li), helium (He), sodium (Na), beryllium (Be), potassium (K), magnesium (Mg)…
Correct answer: K- A. d-block
- B. s-block
- C. f-block
- D. p-block
Explanation: The s-block in the periodic table of elements occupies the alkali metals and alkaline earth metals, also known as groups 1 and 2.
Correct answer: s-block