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 7 of 68
- A. Same number of electrons in the valence shell
- B. Similar physical state
- C. Remarkable reducing properties
- D. Homovalent (show same valency)
Explanation: Hydrogen and carbon can both act as reducing agents because they combine with oxygen and remove oxygen from some compounds, so the stated…
Correct answer: Remarkable reducing properties- A. less reactive
- B. Zero group elements
- C. Having completely filled valence shell
- D. All
Explanation: Noble gases are very unreactive because their valence shells are completely filled; they were also historically placed in Group 0.
Correct answer: All- A. Hydrogen
- B. Sodium
- C. Copper
- D. Germanium
Explanation: Germanium was not known when Mendeleev proposed his table; he predicted its existence and properties as eka-silicon, and it was discovered…
Correct answer: Germanium- A. Al-Razi
- B. Moseley
- C. Dobereiner
- D. Democritus
Explanation: Democritus proposed an early atomic concept but did not contribute to the construction of the periodic table, which involved later…
Correct answer: Democritus- A. Flrorine
- B. Chlorine
- C. Bromine
- D. Iodine
Explanation: Boiling points of halogens increase from fluorine to iodine because their molecules become larger and more polarizable, so London…
Correct answer: Iodine- A. Metallic character
- B. Electronegativity
- C. Oxidizing power
- D. Tendency to get reduced
Explanation: Metallic character generally increases down a group because atomic size and shielding increase, making the outer electron easier to…
Correct answer: Metallic character- A. Group IA
- B. Group IB
- C. Group VIIA
- D. Group VIII
Explanation: Group IA elements have low ionization energy because they can readily lose their single valence electron, while their electron affinity is…
Correct answer: Group IA- A. Cr
- B. Mn
- C. Sn
- D. O
Explanation: Manganese reaches oxidation state +7 in permanganate, MnO4-, which is higher than chromium's common maximum of +6, tin's +4, and oxygen's…
Correct answer: Mn- A. Increase
- B. Decrease
- C. Remain constant
- D. No regular trend
Explanation: The melting points of halogens increase down Group VIIA because molecular size and polarizability increase, strengthening London…
Correct answer: Increase- A. Atom will lose electron easily
- B. Atom will gain electron easily
- C. Atom may form di-positive ion
- D. The reason is unknown
Explanation: A higher electron affinity means that an atom releases more energy when it accepts an electron, so it has a greater tendency to gain an…
Correct answer: Atom will gain electron easily- A. Increases
- B. Decreases
- C. Can not be predicted
- D. Remains constant
Explanation: Across a period, added electrons enter the same principal shell, while the number of inner-shell electrons remains nearly unchanged, so…
Correct answer: Remains constant- A. Isobars
- B. Isomers
- C. Isotopes
- D. Isotropes
Explanation: Isotopes are atoms of the same element with the same atomic number but different mass numbers, caused by different numbers of neutrons.
Correct answer: Isotopes- A. Alkali metal
- B. Alkaline earth metal
- C. Elements from Li to Ne
- D. Halogens
Explanation: From Li to Ne, electrons are added to the same second shell while nuclear charge increases, so effective nuclear attraction increases and…
Correct answer: Elements from Li to Ne- A. The nature of its oxides
- B. The charge on its ions
- C. The formula of its oxide
- D. Its number of isotopes
Explanation: The periodic-table position can help predict oxide character, common ionic charge, and often oxide formula from valence electrons, but it…
Correct answer: Its number of isotopes135. In modern periodic table all the leements are arranged in ascending order of__________________?
- A. Valency
- B. Atomic mass
- C. Atomic number
- D. Valence electrons
Explanation: The modern periodic table arranges elements in increasing atomic number, which is the number of protons in the nucleus.
Correct answer: Atomic number- A. Same family
- B. Same period
- C. p block elements
- D. Right upper corner
Explanation: Elements in the same family, or vertical group, have similar valence-shell electronic configurations, so they show similar chemical…
Correct answer: Same family- A. Dobereiner
- B. Newland
- C. Mendeleev
- D. Al-Razi
Explanation: Johann Wolfgang Döbereiner introduced the concept of triads, grouping three elements with similar properties in which the atomic mass of…
Correct answer: Dobereiner138. Periodic table provides a basic framework to study elements with respect to their__________________?
- A. Physical properties
- B. Chemical properties
- C. Properties of their compounds
- D. All
Explanation: The periodic table arranges elements so that their physical properties, chemical properties, and the properties of their compounds can be…
Correct answer: All- A. Number of valence electrons
- B. Atomic number
- C. Atomic mass
- D. Atomic volume
Explanation: Elements in the same vertical group generally have the same number of valence electrons, especially in the main-group elements, giving…
Correct answer: Number of valence electrons- A. nitrogenous fertilizers
- B. micronutrients
- C. phosphorus fertilizer
- D. all of the above
Explanation: Elements needed by plants in very small quantities, such as iron, zinc, copper and manganese, are called micronutrients.
Correct answer: micronutrients