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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- A. Cl2
- B. NO2
- C. CO
- D. CO2
Explanation: Reaction with limewaterCarbon dioxide reacts with limewater (a solution of calcium hydroxide, Ca(OH)2), to form a whiteprecipitate…
Correct answer: CO2- A. C
- B. Pb3O4
- C. Ge
- D. PbO2
Explanation: Catenation or self linkage. Carbon has a tendency to form long chains of identical atoms.
Correct answer: C583. Chrome yellow is:
- A. PbMoO4
- B. K2Cr2O7
- C. PbCrO4
- D. K2CrO4
Explanation: Lead Chromate (PbCrO4) It is used as a pigment under the name of chrome yellow.
Correct answer: PbCrO4- A. PbO
- B. PbO2
- C. Pb3O4
- D. Pb2O3
Explanation: Lead Monoxide (Litharge, Massicot) PbOLitharge varies in colour from pale yellow to reddish yellow, possibly owing to the existence of two…
Correct answer: PbO- A. CO2
- B. N2
- C. CO
- D. NO
Explanation: In the presence of oxygen, including atmospheric concentrations, carbon monoxide burns with a blue flame, producing carbon dioxide.
Correct answer: CO- A. SiO2
- B. Na2SiO3
- C. H2SiO3
- D. Silicones
Explanation: Uses of Sodium Silicate:1. It is used as a filler for soap in soap industry.2. It is used in textile as a fire proof.3.
Correct answer: Na2SiO3- A. Litharge
- B. Massicot
- C. Sandhur
- D. Halite
Explanation: When lead is heated in air at about 340°C, it absorbs oxygen and forms a bright scarlet crystalline powder of read lead or minium.
Correct answer: Sandhur588. Chief ore of Al is:
- A. Na3AlF6
- B. Al2O3 . 2H2O
- C. Al2O3
- D. Al2O3 . H2O
Explanation: Bauxite (Al2O3. 2H2O) is the chief ore of aluminium from which aluminium is extracted by bayers process.
Correct answer: Al2O3 . 2H2O- A. Neutral
- B. Alkaline
- C. Acidic
- D. Corrosive
Explanation: Borax when dissolved in water form NaOH and H3BO3. a strong alkali (NaOH) is formed which is highly ionized.
Correct answer: Alkaline- A. 1
- B. 2
- C. 3
- D. 4
Explanation: Carbon and oxygen in CO form two covalent bond and one dativebond and then their is one lone pair left on oxygenExplained: oxygen has two…
Correct answer: 1- A. Iron
- B. Copper
- C. Aluminium
- D. Zinc
Explanation: Al has a high affinity for oxygen It readily removes oxygen from Oxides of less reactive metals so it is used in thermite processWhen a…
Correct answer: Aluminium- A. Ca2B6O11 . 5H2O
- B. CaB4O7 . 4H2O
- C. Na2B4O7 . 4H2O
- D. CaNaB5O9 . 8H2O
Explanation: Colemanite chemical formula is Ca2B6O11 . 5H2O
Correct answer: Ca2B6O11 . 5H2O- A. Beryllium
- B. Aluminium
- C. Carbon
- D. Silicon
Explanation: The Group IIIA of the Periodic Table comprises the elements boron, aluminium, gallium, indium and thallium So as Al belongs to 3A group so…
Correct answer: Aluminium- A. 1s2, 2s2, 2p6, 3s2, 3p1
- B. 1s2, 2s2, 2p6, 3s2, 3p6, 4s2
- C. 1s2, 2s2, 2p6
- D. 1s2, 2s2, 2p6, 3s2, 3p3
Explanation: As group 3A elements has 3 electrons in valence shell so its outer shell electronic configuration will be ns²np¹
Correct answer: 1s2, 2s2, 2p6, 3s2, 3p1- A. Barium
- B. Iodine
- C. Lead
- D. Oxygen
Explanation: Carbon, silicon, germanium, Lead belongs to group 4A as it has 4 electron in valance shell
Correct answer: Lead- A. Silicon
- B. Aluminium
- C. Sodium
- D. Oxygen
Explanation: The s-block elements are the metals in Group IA and Group IIA of the periodictable.They are called the s-block elements because sorbitals…
Correct answer: Sodium- A. Na3AlF6
- B. Al2O3 . 2H2O
- C. Al2O3
- D. Al2O3 . H2O
Explanation: Bauxite (Al2O3. 2H2O) is the chief ore of aluminium from which aluminium is extracted by bayers process
Correct answer: Al2O3 . 2H2O- A. Fe
- B. Cu
- C. Al
- D. Zn
Explanation: Al has a high affinity for oxygen It readily removes oxygen from Oxides of less reactive metals so it is used in thermite processWhen a…
Correct answer: Al599. Aluminum oxide is:
- A. Acidic
- B. Basic
- C. Amphotric
- D. None of these
Explanation: Aluminium is amphoteric. It dissolves in both acids and bases with the liberation of hydrogen gas.Aluminium reacts slowly with dilute acid…
Correct answer: Amphotric- A. Triclinic
- B. Monoclinic
- C. Rhomleric
- D. None of these
Explanation: Lead Chromate (PbCrO4) It is used as a pigment under the name of chrome yellow.
Correct answer: Monoclinic