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. Lanthanides and actinides.
- B. s and p block elements.
- C. Chalcogens and halogens
- D. d and f block elements.
Explanation: Transition element are those elements which lie between s and p-block elements and their properties are also between s and p-block elements.
Correct answer: s and p block elements.- A. Hydrogen resembles in properties with IA, IVA and VIIA elements
- B. Hydrogen resembles in properties with IIIA, IVA and VA elements
- C. Hydrogen resembles in properties with IIA, IVA and VIA elements
- D. Hydrogen resembles in properties with IIA, IIIA and VIIA elements
Explanation: Hydrogen's placement at the top of Group IA is due to its similarity in properties with alkali metals, such as having one electron in its…
Correct answer: Hydrogen resembles in properties with IA, IVA and VIIA elements- A. Group IA
- B. (b) Group IB.
- C. Group VIIA:
- D. Group VIII
Explanation: - **Correct Option: (b) Group IB** Explanation: Group IB elements typically have lower ionization energies and electron affinities…
Correct answer: (b) Group IB.- A. All the metals are good conductors of electricity
- B. Non-metals have high ionization energies
- C. Alkali metals have low melting points
- D. Halogens are highly reactive non-metals
Explanation: Some metals, like Bismuth and Mercury, are poor conductors of electricity.
Correct answer: All the metals are good conductors of electricity- A. Dobereiner
- B. Mendeleev
- C. Newlands
- D. Meyer
Explanation: Dobereiner observed that when elements are arranged in order of increasing atomic weight, every third element shows similar properties.
Correct answer: Dobereiner- A. Aluminum
- B. Silicon
- C. Zinc
- D. Germanium
Explanation: Mendeleev predicted the existence of several elements based on gaps in his periodic table.
Correct answer: Germanium- A. Less reactive
- B. Zero group elements
- C. Completely filled valence shell
- D. All of the above
Explanation: Noble gases are named for their inert nature, characterized by three significant features:Less reactive: Due to their completely filled…
Correct answer: All of the above- A. Boron & Beryllium
- B. Nitrogen & Phosphorous
- C. Magnesium & Aluminium
Explanation: Elements within the same group (vertical column) in the periodic table share similar chemical properties due to having the same number of…
Correct answer: Nitrogen & Phosphorous- A. Alkali metals
- B. Alkaline earth metals
- C. Elements from Li to Ne
- D. Halogens
Explanation: As we move across a period (horizontal row) in the periodic table from left to right, the atomic number increases,meaning more protons and…
Correct answer: Elements from Li to Ne- A. Location of nucleus by Rutherford
- B. Atomic number by Moseley
- C. X-rays by Roentgen
- D. Natural radioactivity by Henry Becquerel
Explanation: While Mendeleev successfully organized elements based on their atomic mass, some anomalies and inconsistencies existed in his periodic…
Correct answer: Atomic number by Moseley- A. H+
- B. Atomic radii
- C. Cl-
- D. All are stable
Explanation: Correct: The chloride ion (Cl-) is stable in aqueous solution because it has achieved a stable octet configuration (eight electrons in its…
Correct answer: Cl-- A. Nuclear charge only
- B. Atomic size only
- C. Shielding effect only
- D. All of the above and nature of orbital
Explanation: Correct: Ionization energy, the energy required to remove an electron from an atom, is influenced by multiple factors:Nuclear charge…
Correct answer: All of the above and nature of orbital- A. Increase
- B. Decrease
- C. Remain constant
- D. Remain same
Explanation: As we move down a group in the VII-A group (halogens), the atomic size increases due to additional electron shells.
Correct answer: Decrease- A. Mg > Sr
- B. Ba > Mg
- C. Lu > Ce
- D. Cl > I
Explanation: Within the same group (column) in the periodic table, atomic size increases as we move down.
Correct answer: Lu > Ce- A. Magnesium and Lead
- B. Magnesium and Aluminium
- C. Aluminium and Zinc
- D. Aluminium and Mercury
Explanation: Magnalium is an alloy of aluminium with magnesium and small amounts of nickel and tin.
Correct answer: Magnesium and Aluminium- A. Mendeleev's periodic law
- B. Newland's law of octaves
- C. Doberenier's triads
- D. Lothar Meyer's classification
- E. Modern periodic law
Explanation: The modern Periodic law can be stated as: "The physical and chemical properties of the elements are periodic functions of their atomic…
Correct answer: Modern periodic law- A. They belong to 18th group of modern periodic table
- B. Except Rn, all the remaining atoms are present in the air.
- C. These elements belong to 17th group in IUPAC system.
- D. These are highly reactive elements.
- E. None of the above
Explanation: According to the periodic table, noble gases lie in 18th group also known as 0 group. So, option A is correct.
Correct answer: They belong to 18th group of modern periodic table- A. Option A
- B. Option B
- C. Option C
- D. Option D
- E. Option E
Explanation: CH3 is an ortho-para (2,4,6) directing group which means the incoming group attaches to the ortho or para position.
Correct answer: Option D- A. S block element
- B. P block element
- C. D block element
- D. Noble gases
Explanation: At the end of the periodic table noble gases are found as shown below:
Correct answer: Noble gases- A. CO2
- B. CI2
- C. O2
- D. N2
- E. Na
Explanation: Carbon dioxide (CO2) and Clorine are the gas that reacts with calcium oxide (CaO) but does not react with sodium bicarbonate (NaHCO3).
Correct answer: Na