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.
Last updated
1,359 questions · page 35 of 68
- A. N
- B. P
- C. As
- D. Sb
Explanation: Allotropes are different structural modifications of the same element in the same physical state. Nitrogen (N) does not exhibit allotropy.
Correct answer: N- A. It is relatively unstable than O₂
- B. It provides an extra oxygen atom then O₂
- C. It provides Nascent Oxygen
- D. All of above
Explanation: Ozone (O₃) is a more powerful oxidizing agent than oxygen (O₂) due to the following reasons:a) It is relatively unstable than O₂: Ozone is…
Correct answer: All of above- A. 2
- B. 3
- C. 1
- D. Several
Explanation: Nitrogen forms a variety of oxides with different oxidation states. Some common examples include:Nitrous oxide (N₂O)Nitric oxide…
Correct answer: Several- A. Sodium
- B. Iron
- C. Sulphur
- D. Potassium
Explanation: Vulcanization is the process of adding sulfur to natural rubber to improve its strength, elasticity, and durability.
Correct answer: Sulphur- A. Oxygen
- B. Hydrogen
- C. Carbon dioxide
- D. Nitrogen
Explanation: Air is composed of various gases, and nitrogen makes up the largest portion, roughly 78%.
Correct answer: Nitrogen- A. O
- B. S
- C. Cd
- D. Fe
Explanation: Valence electrons are the electrons in the outermost shell of an atom. Sulfur (S) is in group 16 of the periodic table, which means it has…
Correct answer: S- A. NaCl
- B. NaNO₃
- C. NaOH
- D. NaNO₄
Explanation: Chile saltpeter is the common name for sodium nitrate (NaNO₃). It is a naturally occurring mineral that is found in large deposits in…
Correct answer: NaNO₃- A. XeF₂
- B. XeF₄
- C. XeF₆
- D. All of the above
Explanation: Hydrofluoric acid (HF) can be produced by the reduction of all the given xenon fluorides (XeF₂, XeF₄, XeF₆).
Correct answer: All of the above- A. Oxidizing
- B. Reducing
- C. Both a and b
- D. None of these
Explanation: Bleaching powder, chemically known as Calcium Oxychloride (CaOCl₂), is an oxidizing agent.
Correct answer: Oxidizing- A. Ca(ClO)₄
- B. Ca₂(ClO)₂
- C. Ca(ClO)₂
- D. Ca(Cl₂O)₂
Explanation: Bleaching powder, also known as calcium hypochlorite, has the chemical formula Ca(ClO)₂.
Correct answer: Ca(ClO)₂- A. Bromine
- B. Fluorine
- C. Chlorine
- D. Argon
Explanation: Tear gas is a chemical irritant that causes a burning sensation in the eyes, leading to tears and discomfort.
Correct answer: Chlorine- A. F
- B. Cl
- C. Br
- D. I
Explanation: Fluorine (F) is used in the production of various refrigerants, particularly in the form of chlorofluorocarbons (CFCs) and…
Correct answer: F- A. Radon
- B. Neon
- C. Argon
- D. Both a and b
Explanation: Argon (Ar) is a noble gas that is used in various applications due to its inert nature.
Correct answer: Argon- A. 1.77 kJ/mol
- B. 9.7 kJ/mol
- C. 18.0 kJ/mol
- D. 6.5 kJ/mol
Explanation: This means that to vaporize one mole of liquid radon, 18.0 kilo joules of energy are required.
Correct answer: 18.0 kJ/mol- A. Cl
- B. I
- C. Br
- D. F
Explanation: Fluorine (F) is the most electronegative element and does not form stable oxyacids. It is too reactive to form stable bonds with oxygen.
Correct answer: F- A. F₂>Br₂>Cl₂>I₂
- B. F₂>Cl₂>Br₂>I₂
- C. F₂<Cl₂<Br₂<I₂
- D. F₂<Br₂<Cl₂<I₂
Explanation: Oxidizing power refers to the ability of a substance to gain electrons and oxidize another substance.
Correct answer: F₂>Cl₂>Br₂>I₂- A. KMnO₄
- B. K₂MnO
- C. KMnO₂
- D. None of these
Explanation: The correct formula for Potassium permanganate is KMnO₄
Correct answer: KMnO₄- A. He
- B. Ne
- C. Ar
- D. Kr
Explanation: The boiling point of noble gases increases down the group. Krypton (Kr) has the highest boiling point among the given noble gases.
Correct answer: Kr- A. F to At
- B. N to Bi
- C. C to Sn
- D. H to Cs
Explanation: Halogens are a group of non-metallic elements that are located in Group 17 of the periodic table.
Correct answer: F to At- A. XeF₆
- B. XeF₄
- C. XeF₂
- D. All of these
Explanation: Xenon fluorides (XeF₂, XeF₄, and XeF₆) are used as precursors to synthesize various xenon oxides.
Correct answer: All of these