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 44 of 68
- A. Ba
- B. Na
- C. K
- D. Cs
- E. Li
Explanation: Sodium (Na), an alkali metal from Group 1, gives a bright yellow flame during a flame test.
Correct answer: Na- A. Caustic soda
- B. Alum
- C. Borax
- D. Sulfuric acid
- E. Nitric acid
Explanation: The correct answer is Sulfuric acid (Option D). Historically, sulfuric acid was called 'oil of vitriol' because it was produced by…
Correct answer: Sulfuric acid- A. Oxygen
- B. Water
- C. Halogens
- D. Nitrogen
- E. Hydrogen
Explanation: Option C is correct. P-block elements primarily react with halogens to form binary compounds, such as halides.
Correct answer: Halogens- A. Aluminum oxide
- B. Magnesium oxide
- C. Potassium oxide
- D. Sodium oxide
Explanation: Aluminum oxide (Al₂O₃) is amphoteric, meaning it can exhibit both acidic and basic properties depending on the environment.
Correct answer: Aluminum oxide- A. Increase down the group
- B. Decrease down the group
- C. Increase then decrease down the group
- D. Doesn't change down the group
Explanation: The solubility of alkaline earth metal sulfates varies down the group and generally decreases as you move from beryllium to barium.
Correct answer: Decrease down the group- A. Large radius and low charge density
- B. Small radius and low charge density
- C. Large radius and high charge density
- D. Small radius and high charge density
Explanation: Correct, as lithium has the smallest atomic size in the alkali metal group, leading to high charge density, which makes it behave…
Correct answer: Small radius and high charge density- A. decreases
- B. gradually increases then decreases
- C. increases
- D. remains same
Explanation: The metallic character of alkaline earth metals increases down the group.As you move down Group 2 in the periodic table, elements like…
Correct answer: increases- A. Get4 < Pb+4 < Sn+4
- B. Ge+4 < Snt4 < Pb+4
- C. Get4 > Pb+4 > Sn+4
- D. Ge+4 > Sn+4 > Pb+4
Explanation: The stability order of M+4 cations generally depends on factors like the size of the cation, its effective nuclear charge, and the…
Correct answer: Ge+4 > Sn+4 > Pb+4- A. Beryllium
- B. Lithium
- C. Magnesium
- D. Potassium
Explanation: Potassium reacts with oxygen to form potassium superoxide (KO2 ), especially in an oxygen-rich environment.
Correct answer: Potassium- A. Ca(OH)2
- B. LiOH
- C. Mg(OH)2
- D. NaOH
Explanation: The strength of a base in the hydroxide form typically increases down a group in the periodic table due to the increasing size of the…
Correct answer: NaOH- A. K
- B. Li
- C. Na
- D. Rb
Explanation: The normal oxide of lithium is lithium oxide (Li₂O). It is formed when lithium reacts with oxygen in a stoichiometric ratio.
Correct answer: Li- A. Al
- B. Mg
- C. Na
- D. Si
Explanation: Al forms Al2O3 after reacting with oxygen which acts as a protective layer against further corrosion.
Correct answer: Al- A. Cu (Copper)
- B. Na (Sodium)
- C. Fe (Iron)
- D. Al (Aluminum)
Explanation: Sodium is a highly reactive alkali metal. It reacts vigorously with water, producing hydrogen gas and heat.
Correct answer: Na (Sodium)- A. Na2 O and NO2
- B. NaNO2 and O2
- C. Na, NO2 and O2
- D. Na2 O, NO2 and O1
Explanation: This is correct. Sodium nitrate decomposes into sodium nitrite and oxygen gas.
Correct answer: NaNO2 and O2- A. Good conductor
- B. Non-conductor
- C. Semi-conductor
- D. None of these
Explanation: Diamond has a strong network of covalent bonds, with no free electrons.
Correct answer: Non-conductor- A. BeO
- B. MgO
- C. CaO
- D. BaO
Explanation: BaO) - Correct: Barium oxide dissolves most easily in water as it has the lowest lattice energy and the most ionic character among these…
Correct answer: BaO- A. Increases
- B. Decreases
- C. Remain unchanged
- D. Has irregular trend
Explanation: (Increases) - Correct: Down the group, metallic reactivity increases because atomic size increases, and ionization energy decreases…
Correct answer: Increases- A. More
- B. Less
- C. Equal to
- D. Two times more
Explanation: More) - Correct: The solutions of Group IIA hydroxides become more basic down the group due to increased solubility and higher OH⁻ ion…
Correct answer: More- A. OH⁻
- B. H₂O
- C. O²⁻
- D. M²⁺
Explanation: OH⁻) - Correct: Hydroxide ion (OH⁻) is the base formed in solution
Correct answer: OH⁻- A. Be + 2H₂O → H₂ + Be(OH)₂
- B. Mg + 2H₂O → H₂ + MgO
- C. Ca + 2H₂O → H₂ + Ca(OH)₂
- D. Ba + 2H₂O → H₂ + Ba(OH)₂
Explanation: Be + 2H₂O → H₂ + Be(OH)₂) - Correct: This reaction is not possible because Be does not react with water under normal conditions.
Correct answer: Be + 2H₂O → H₂ + Be(OH)₂