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 65 of 68
- A. CO2
- B. CO
- C. CaO
- D. C
Explanation: A is correct as urea is produced by the reaction of CO2 B is incorrect (fact)C is incorrect (fact)D is incorrect (fact)
Correct answer: CO2- A. 90
- B. 80
- C. 98
- D. 89
Explanation: In contact process, SO3 is formed in 98% of H2SO2
Correct answer: 98- A. 2nd group
- B. 4th group
- C. 3rd group
- D. 5th group
Explanation: The outer electronic configuration of element "X" is ns2 np2, indicating that it has 2 electrons in the s subshell and 2 electrons in the…
Correct answer: 4th group- A. s-block
- B. d-block
- C. f-block
- D. p-block
Explanation: In the periodic table, elements with similar properties are grouped in blocks based on their electronic configurations.
Correct answer: p-block- A. 3f
- B. 4f
- C. 5f
- D. 6f
Explanation: The lanthanides are characterized by their incompletely filled 4f sub-shells.
Correct answer: 4f1286. LaH2.75 is the formula
- A. Of normal binary hydride
- B. Of an interstilial hydride
- C. of covalent hydride
- D. That does not exist
Explanation: HYDRIDES Hydrogen compounds with metals and non-metals are known as hydrides.
Correct answer: Of an interstilial hydride- A. Aluminium can be recycled
- B. Aluminium is light
- C. Aluminium is cheaper
- D. Aluminium is resistant to corrosion
Explanation: It is because aluminium is resistant to corrosion by organic acids.
Correct answer: Aluminium is resistant to corrosion1288. For the atomic numbers given below, which pair of elements will have the same chemical properties?
- A. 13,22
- B. 3,11
- C. 4,24
- D. 2,4
Explanation: Option B is correct as the elements with atomic numbers 3 and 11 are Lithium and sodium, respectively which are both in the same group…
Correct answer: 3,11- A. HOCl
- B. HCIO2
- C. HClO3
- D. HClO4
Explanation: The oxidizing power of oxy acids of halogens increases as the oxidation number of the halogen in the compound increases.
Correct answer: HOCl- A. Xe is the most reactive among rare gasses
- B. He is an inert gas
- C. Randon is obtained from decay of radium
- D. The most abundant rare gas found in atmosphere is He
Explanation: The most abundant rare gas found in the atmosphere is Argon not Helium.
Correct answer: The most abundant rare gas found in atmosphere is He1291. For atomic numbers given below , which pair of elements will have the same chemical properties ?
- A. 13,22
- B. 3,11
- C. 4,24
- D. 2,4
Explanation: Elements belonging to the same group have the same chemical properties.
Correct answer: 3,11- A. F
- B. Cl
- C. Br
- D. I
Explanation: Fluorine is unique among the halogens as it is the most electronegative element, and it only forms compounds where it can achieve a -1…
Correct answer: F- A. 1
- B. 2
- C. 3
- D. 4
Explanation: The most electronegative elements are found in Period 2 of the periodic table.
Correct answer: 21294. The longest bond is of:
- A. H-I
- B. H-O
- C. H-S
- D. H-Cl
Explanation: The correct option is C: H-S. The bond length between hydrogen and sulfur is longer due to the relatively lower electronegativity of…
Correct answer: H-S- A. Metals
- B. Non metal
- C. Metalloid
- D. None of the above
Explanation: Arsenic and Antimony are classified as metalloids. Metalloids are elements that have properties of both metals and nonmetals.
Correct answer: Metalloid- A. Al
- B. Si
- C. Fe
- D. P
Explanation: Phosphorus being more electronegative than Si forms more acidic oxides.
Correct answer: P- A. 35.50
- B. 34.50
- C. 72.00
- D. 70.00
Explanation: The atomic mass of Cl35 is approximately 35.00 atomic mass units (amu), and the atomic mass of Cl37 is approximately 37.00 amu.
Correct answer: 35.50- A. Na2O
- B. MgO
- C. Al2O3
- D. P2O5
Explanation: Sodium oxide is highly basic because it readily releases hydroxide ions when dissolved in water, resulting in a highly alkaline solution.
Correct answer: Na2O- A. Haematite
- B. Limonite
- C. Siderite
- D. Magnetite
Explanation: Haematite is considered a good-quality iron ore because it contains a high percentage of iron and low impurities, including low…
Correct answer: Haematite- A. The addition of an electron increases the volume of the electron cloud
- B. It increases the effective nuclear charge
- C. The repulsion between electrons increases with the addition of electrons
- D. The attraction between electrons and the nucleus increases
Explanation: The correct answer is that the repulsion between electrons increases with the addition of electrons.
Correct answer: The repulsion between electrons increases with the addition of electrons