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 46 of 68
- A. Exhibiting amphoteric nature of oxides
- B. Forming polymeric hydrides
- C. Forming covalent halides
- D. Exhibiting maximum covalence in compounds
Explanation: The correct answer is that Be and Al differ in exhibiting the maximum covalency in compounds.
Correct answer: Exhibiting maximum covalence in compounds- A. Na2CO3
- B. K2CO3
- C. Ca(HCO3)2
- D. CaCO3
Explanation: Upon heating, compound 'X' decomposes into CaO and CO2. The residue from this reaction, when mixed with water, forms Ca(OH)2 (Y).
Correct answer: CaCO3903. Which one of the following characteristics of lithium does not resemble with other alkali metals?
- A. It can form nitride when heated in air.
- B. It reacts with water to form hydroxide and hydrogen.
- C. It is soluble in liquid ammonia.
- D. Its nitrate is thermally unstable.
Explanation: Lithium stands out from other alkali metals as it is the only one capable of forming nitride when heated in air.
Correct answer: It can form nitride when heated in air.- A. Ba2+
- B. K+
- C. Li+
- D. Be2+
Explanation: Be2+ has the largest heat of hydration due to its small size and high charge, leading to high polarising power and attraction of multiple…
Correct answer: Be2+- A. Two moles of ammonia
- B. One mole of nitric acid
- C. One mole of ammonia
- D. Two moles of nitric acid
Explanation: When one mole of magnesium nitride reacts with an excess of water, it produces two moles of ammonia according to the balanced chemical…
Correct answer: Two moles of ammonia- A. Calcined gypsum
- B. Sea shells
- C. Dolomite
- D. A marble statue
Explanation: The correct answer is Calcined gypsum. Gypsum is CaSO4 . 2H2O, which does not contain CaCO3. Sea shells contain calcium carbonate (CaCO3).
Correct answer: Calcined gypsum- A. Mg
- B. Ba
- C. Ca
- D. Be
Explanation: Beryllium (Be) is the correct metal in this scenario. Beryllium sulfate (BeSO4) is water-soluble due to its high solvation energy, unlike…
Correct answer: Be- A. Li+
- B. Na+
- C. K+
- D. Rb+
Explanation: The ionic mobility of an ion in aqueous solution is inversely related to the extent of hydration.
Correct answer: Rb+909. Cryolite is :
- A. Calcium fluoride
- B. Potassium hexafluoroaluminate(III)
- C. Basic magnesium carbonate
- D. Sodium hexafluoroaluminate(III)
Explanation: The correct answer is Option D: Sodium hexafluoroaluminate(III). Cryolite is an ore of sodium with the chemical formula Na3[AlF6], making…
Correct answer: Sodium hexafluoroaluminate(III)- A. Cu2O + FeS
- B. FeSiO3
- C. CuFeS2
- D. Cu2S + FeO
Explanation: In the extraction of copper from its ores, iron is a common impurity that needs to be removed during the smelting process.
Correct answer: FeSiO3- A. Reduction
- B. Oxidation
- C. Reduction followed by oxidation
- D. Oxidation followed by reduction
Explanation: Oxidation followed by Reduction: This process involves the oxidation of carbon to carbon dioxide, followed by reduction steps to extract…
Correct answer: Oxidation followed by reduction- A. Cuprite
- B. Chalcoite
- C. Chalcopyrite
- D. both (b) and (c)
Explanation: Chalcocite and Chalcopyrite are the correct answers as they are copper ores that contain both sulfur and copper.
Correct answer: both (b) and (c)- A. K2O. Al2O3. 6 SiO2
- B. K2O3. Al2O3.6Si2.O2.2H2O
- C. Al2O3. 2SiO2.2H2O
- D. 3MgO.4SiO2.H2O
Explanation: The correct formula for feldspar is K2O.Al2O3.6SiO2. Feldspar is primarily composed of aluminum silicates with potassium oxide and silicon…
Correct answer: K2O. Al2O3. 6 SiO2- A. Silica
- B. Metal oxide
- C. All impurities from ores
- D. Silica and undesirable metal oxide
Explanation: Flux is commonly used to remove both silica and undesirable metal oxides from ores during metallurgical processes.
Correct answer: Silica and undesirable metal oxide- A. Oxidation of Fe ore
- B. Reduction of Fe ore
- C. Formation of slag
- D. Purification of Fe formed
Explanation: Limestone is used in the formation of slag during the extraction of iron from its ore in a blast furnace.
Correct answer: Formation of slag- A. Cupellation
- B. Poling
- C. Van Arkel
- D. Zone refining
Explanation: The equation given involves the purification of titanium (Ti) using the Van Arkel process, which is also sometimes referred to as the…
Correct answer: Van Arkel- A. Volatile stable compound
- B. Volatile unstable compound
- C. Non volatile stable compound
- D. None of the above
Explanation: The Van Arkel method, also known as the iodide process, is a purification technique used for certain reactive metals like titanium and…
Correct answer: Volatile stable compound- A. Hg
- B. Zn
- C. Cd
- D. Ca
Explanation: Calamine is a mineral that is a significant source of zinc. It is primarily composed of zinc carbonate (ZnCO3) along with variable amounts…
Correct answer: Zn- A. Adsorption
- B. Absorption
- C. Coagulation
- D. Sedimentation
Explanation: Froth flotation is a widely used process for separating valuable minerals from gangue (unwanted material) in ore minerals.
Correct answer: Adsorption- A. ZnO
- B. Fe2O3
- C. PbO
- D. Al2O3
Explanation: Option D is correct.Aluminum oxide (Al2O3) cannot be reduced to metal by carbon.
Correct answer: Al2O3