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.
Last updated
1,359 questions · page 29 of 68
- A. Na2SO4
- B. BaCO3
- C. Mg(NO3)2
- D. CaSO4
Explanation: Alkaline earth metal nitrates, such as magnesium nitrate (Mg(NO3)2), calcium nitrate (Ca(NO2)2), and barium nitrate (Ba(NO3)2), decompose…
Correct answer: Mg(NO3)2- A. Be
- B. Mg
- C. Ca
- D. Sr
Explanation: Beryllium is the only alkaline earth metal that releases hydrogen gas (H2) when reacted with alkalies (strong bases like sodium hydroxide…
Correct answer: Be- A. Ca(OH)2
- B. Mg(OH)2
- C. Be(OH)2
- D. Sr(OH)2
Explanation: Beryllium hydroxide is the least soluble among the group II hydroxides. It is only slightly soluble in water.
Correct answer: Be(OH)2- A. Forms a sparingly soluble sulfate
- B. Forms a soluble sulfate
- C. Forms a highly reactive sulfate
- D. Forms a volatile sulfate
Explanation: This is the correct answer. Strontium, like calcium and barium, is a Group 2A element (alkaline earth metal).
Correct answer: Forms a sparingly soluble sulfate- A. Be > Ca > Mg
- B. Ca>Be>Mg
- C. Mg > Be > Ca
- D. Be>Mg> Ca
Explanation: The correct order of melting points for group IIA elements is Be > Ca > Mg.
Correct answer: Be > Ca > Mg- A. Be
- B. Mg
- C. None of these
- D. Ba
Explanation: The correct answer is Beryllium (Be). Beryllium does not react with water even at red hot temperature due to the formation of a protective…
Correct answer: Be- A. Na (Sodium)
- B. K (Potassium)
- C. Mg (Magnesium)
- D. Ca (Calcium)
Explanation: Magnesium (Mg) is considered a 'good' metal because it is lightweight, strong, and ductile, making it suitable for various industrial…
Correct answer: Mg (Magnesium)- A. Decrease
- B. Increase
- C. Constant
- D. Variable
Explanation: The solubility of IIA elements' hydroxides increases as you move down the group.
Correct answer: Increase- A. Charge on ion
- B. Size of metal
- C. Charge/size
- D. A and C
Explanation: Basicity is the ability of a substance to accept a proton. This ability is inversely proportional to the charge on an ion and the…
Correct answer: A and C570. When a metal carbonate is heated at 100°C, which of the following compounds will readily decompose?
- A. BaCO₃
- B. MgCO₃
- C. BeCO₃
- D. SrCO₃
Explanation: The thermal stability of metal carbonates increases down a group in the periodic table because the larger cations (lower down the group)…
Correct answer: BeCO₃- A. Be2C
- B. CaC2
- C. MgC2
- D. SrC2
Explanation: Beryllium carbide does not decompose with water to form CH4 gas. It is generally less reactive compared to calcium carbide.
Correct answer: Be2C- A. Coke, Coal tar, Coal gas
- B. Methane, Coal, Coaltar
- C. Carbon monoxide, methane, hydrogen gas
- D. Phenol, coke, hydrogen gas
Explanation: Option A is correct because it accurately represents the main products obtained from the destructive distillation of coal.
Correct answer: Coke, Coal tar, Coal gas- A. 2+,4+
- B. 1+,4+
- C. 4+,2+
- D. 2+,3+
Explanation: Compounds of Pb+4 act as strong oxidizing agents while those of Pb+2 act as reducing agents.Pb+2 > Pb +4
Correct answer: 2+,4+- A. Reducing agents
- B. Oxidizing agents
- C. Dehydrating agents
- D. Hydrating agents
Explanation: Compounds containing Pb+4 ions tend to act as reducing agents. In these compounds, lead is in its highest oxidation state (+4), and it has…
Correct answer: Reducing agents- A. Be
- B. Al
- C. C
- D. Si
Explanation: The Group IIIA of the Periodic Table comprises the elements boron, aluminium, gallium, indium and thallium.
Correct answer: Al- A. Si
- B. Al
- C. Na
- D. O
Explanation: Sodium is not present abundantly in the earth's crustThe Earth's crust is a thin outer layer that makes up less than 1% of the planet's…
Correct answer: Na- A. Cu+2
- B. Co+2
- C. Cr+3
- D. Ni+2
Explanation: Chemistry of the Borax-bead Test: Borax, when fused, is decomposed into sodium metaborate and boric anhydride.
Correct answer: Cu+2- A. Onion
- B. Garlic
- C. Egg
- D. Fat
Explanation: Sulphur also occurs in organic compounds present in animals and vegetables.
Correct answer: Fat- A. Al2O3 . SiF4
- B. Al2O3
- C. Na2O3 . 2H2O
- D. Al2O3 . 2SiO2 . 2H2O
Explanation: Clay formula: Al2O3 . 2SiO2 . 2H2OTable 3.3 From Punjab board textbook
Correct answer: Al2O3 . 2SiO2 . 2H2O- A. Free radical
- B. Cationic specie
- C. Electrophile
- D. Nucleophile
Explanation: Electrophile means electron loving so it accept electron pair.BF3 act as lewis acid because it accept electron to complete the octet and…
Correct answer: Electrophile