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 63 of 68
- A. Water gas
- B. Coal gas
- C. Producer gas
- D. None of these options
Explanation: Water gas is a source of commercial hydrogen production. It is a mixture of water and carbon monoxide that gives carbon dioxide and…
Correct answer: Water gas- A. Reducing
- B. Basic
- C. Hydrating
- D. Sulphonating
- E. Both C and D
Explanation: The explanation for this question will be added soon.
Correct answer: Sulphonating1243. Red lead is:
- A. PbO
- B. Pb3O4
- C. Pb2O4
- D. Pb2O5
Explanation: Lead(II, IV) oxide, also called minium, red lead or triplumbic tetroxide, is a bright red or orange crystalline pigment.
Correct answer: Pb3O4- A. Marsh gas
- B. Coal gas
- C. Producer gas
- D. None of these
Explanation: All three options A, B, and C can give hydrogen when reacted with steam however, commercially only the steam-methane reforming method is…
Correct answer: Marsh gas- A. Ammonia
- B. Urea
- C. Di ammonium hydrogen phosphate
- D. Ammonium nitrate
Explanation: Anhydrous ammonia, NH 3, is typically among the least expensive sources of nitrogen and contains 82 percent nitrogen by weight, the…
Correct answer: Ammonia- A. CaO2
- B. CO2
- C. SnO2
- D. SiO2
Explanation: SnO2 is an amphoteric oxide because it can act as both an acid and a base and react with both acidic and basic solutions to form salts.
Correct answer: SnO2- A. Zinc oxide and alumina
- B. Alumina and silica
- C. Silica and Chromium oxide
- D. Zinc oxide and Chromium oxide
Explanation: The industrial preparation of methanol usually involves a catalyst composed of zinc oxide and chromium oxide.
Correct answer: Zinc oxide and Chromium oxide- A. N2
- B. NO2
- C. H2
- D. O2
Explanation: Nitric oxide, NO, reacts with oxygen gas to form nitrogen dioxide, a dark brown gas
Correct answer: NO2- A. Q
- B. S
- C. P
- D. None of these
Explanation: The p-block is on the right side of the standard periodic table and encompasses elements in groups 13 to 18.
Correct answer: P- A. F
- B. Cl
- C. I
- D. At
Explanation: Astatine is extremely rare and is considered one of the rarest naturally occurring elements on Earth.
Correct answer: At- A. Phosphorous
- B. Sulphur
- C. Oxygen
- D. Both A & C
Explanation: Sulphur is the correct answer as it has the largest number of allotropic forms, including rhombic, monoclinic, plastic, and…
Correct answer: Sulphur- A. Aluminium.
- B. Potasium.
- C. Sodium.
- D. Calcium.
Explanation: In aluminum or aluminum alloy casting, the bubbles of an inert gas like argon or nitrogen are passed through the molten metal to perform…
Correct answer: Aluminium.- A. Xenon
- B. Radon
- C. Argon
- D. Krypton
Explanation: Explanation:Xenon is used in bacterial lamps, also known as excimer lamps, which are used to disinfect air and surfaces in hospitals and…
Correct answer: Xenon- A. Electron affinity
- B. Lattice energy
- C. Ionization energy
- D. Crystal energy
Explanation: A is incorrect as electron affinity is the amount of energy released when an electron attaches to a neutral atom or molecule in the…
Correct answer: Ionization energy- A. A gradual increase
- B. A gradual decrease
- C. First decrease then increase
- D. First increase then decrease
Explanation: A is correct because as we move further along a group, mass of the atoms increases due to increased no.
Correct answer: A gradual increase- A. HF
- B. HI
- C. HCl
- D. HBr
Explanation: A is incorrect as HF is not a strong acid.B is correct as Iodine and hydrogen have the lowest bond energy,hence less energy would be…
Correct answer: HI- A. Ne < N < C < B
- B. B < N < C < Ne
- C. B < C < N < Ne
- D. Ne < B < C < N
Explanation: As they move along the period towards the right the ionization energy increases. It is a fact and should be memorised.
Correct answer: B < C < N < Ne- A. Electron Affinity
- B. Non-metallic character
- C. Atomic Radius
- D. Melting point upto group IV
Explanation: The atomic radius decreases as we move along the period from left to right.
Correct answer: Atomic Radius- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Silicon has a giant covalent structure and a lot of heat is required to break the strong covalent bonds hence it has the highest melting…
Correct answer: Option C- A. Nitrogen requires a catalyst
- B. Oxygen is very inactive
- C. Oxygen is found in less concentration
- D. Nitrogen is highly inactive gas
Explanation: Option A is a true statement, but it does not, by itself, explain why nitrogen does not react under normal conditions; Nitrogen is highly…
Correct answer: Nitrogen is highly inactive gas