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 64 of 68
- A. Atomic number
- B. Number of electrons
- C. Number of isotopes & their abundance
- D. None of the above
Explanation: Atomic mass depends on the number of isotopes and their abundance because:Isotopes of an element have the same atomic number but different…
Correct answer: Number of isotopes & their abundance- A. Li
- B. Be
- C. Na
- D. K
Explanation: Lithium is harder than other alkali metals. The melting and boiling point is higher than other alkali metals.
Correct answer: Li- A. H+
- B. H2−2
- C. H
- D. H−
Explanation: Explanation:The correct answer is H+ because when hydrogen loses an electron, it becomes a positively charged ion called a hydrogen ion or…
Correct answer: H+- A. Rubidium
- B. Potassium
- C. Sodium
- D. Lithium
Explanation: Explanation:Lithium carbide is the only alkali metal carbide formed via direct reaction.
Correct answer: Lithium- A. Li2CO3
- B. Mg2CO3
- C. K2CO3
- D. Na2CO3
Explanation: A is correct as Lithium carbonate is not stable to heat. Hence, it decomposes at a lower temperature.B is incorrect as Mg2CO3 is stable…
Correct answer: Li2CO3- A. Chloride ions
- B. Sulfate ions
- C. Phosphate ions
- D. Cr3+ ions
Explanation: The chromyl chloride test is used to detect chloride ions in the qualitative analysis.
Correct answer: Chloride ions- A. Dolomite.
- B. Mgl2
- C. Mg3N2
- D. Epsom salt
Explanation: In 1951 preparation from the elements was first reported involving direct hydrogenation of Mg metal at high pressure and temperature (200…
Correct answer: Mgl2- A. Li
- B. Na
- C. Mg
- D. Be
Explanation: d) Be (Beryllium): This is the correct option. Beryllium does not react with water.
Correct answer: Be- A. P2O5
- B. Fe2O3
- C. Silica
- D. FO
Explanation: a) P2O5 (Phosphorus Pentoxide): This is the correct option. Calcium oxide (CaO) reacts with phosphorus pentoxide (P2O5) to form calcium…
Correct answer: P2O5- A. Calcium
- B. Barium
- C. Beryllium
- D. Strontium
Explanation: Explanation:Calcium is found in egg shells, sea shells, teeth, and bones.
Correct answer: Calcium- A. At high pressure
- B. At room temperature
- C. At high temperature
- D. None of the above
Explanation: Explanation:Molten alkaline earth metal reacts with hydrogen at high pressure and in presence of catalyst forming hydrides.
Correct answer: At high pressure- A. Calcium
- B. Aluminium
- C. Barium
- D. Iron
Explanation: Explanation:The correct answer is calcium because asbestos is a term used to describe a group of six naturally occurring fibrous minerals…
Correct answer: Iron- A. More basic
- B. No change
- C. Less basic
- D. More acidic
Explanation: Group II metal oxides become more basic as you go down the column. As the electronegativities of the metals decrease down the group, hence…
Correct answer: More basic- A. Carbon.
- B. Nitrogen.
- C. Silicon.
- D. All of these.
Explanation: a) Carbon: This is the correct option. Carbon is the element that forms long chains alternating with oxygen.
Correct answer: Carbon.- A. 0.7-1.5
- B. 0.1-0.2
- C. 0.2-0.7
- D. 1.6-2.00
Explanation: Plain carbon steel is an alloy of iron and carbon. It has good machinability and malleability.
Correct answer: 0.2-0.7- A. Nitric oxide
- B. Meta stannic acid.
- C. Ammonium nitrite
- D. None of these.
Explanation: Nitric acid is a very strong acid and is also known as aqua fortis. When metallic tin reacts with concentrated nitric acid it forms…
Correct answer: Meta stannic acid.- A. Pb2O
- B. PbO2
- C. PbO
- D. 2PbCO3.Pb(OH)2
Explanation: a) Pb2O (Lead(II) Oxide): Lead(II) oxide is commonly known as lead oxide or litharge.
Correct answer: Pb2O1278. Al2F2SiO4 is named as:
- A. Gibbsite
- B. Emerald
- C. Bauxite
- D. Cryolite
Explanation: a) Gibbsite: Gibbsite is a mineral composed of aluminum hydroxide (Al(OH)3). It is not the same as Al2F2SiO4.
Correct answer: Gibbsite- A. Pb2O3
- B. Pb2O
- C. PbO
- D. Pb3O4
Explanation: Explanation:The chemical formula of lead suboxide is Pb2O. This option is not correct.
Correct answer: Pb2O- A. Hydration
- B. Hydrolysis
- C. Oxidation
- D. Reduction
Explanation: Explanation:Phosphine can be produced by reduction of phosphorous acid (H3PO3) with a reducing agent such as sodium hypophosphite…
Correct answer: Reduction