s- and p-Block Elements

s- and p-Block Elements MDCAT MCQs with answers

96 past paper MCQs from Chemistry unit 11, s- and p-Block Elements, across 5 topics. They are arranged topic by topic; bigger topics show a sample here and link to their full set and to study notes. Tap “Show answer” for the correct option and a short solution.

Practise as a quiz

Periodic Properties and Their Trends

1.Which of the following has the highest atomic radius in its period? (MDCAT 2023)

  1. alkaline earth metals
  2. alkali metals
  3. chalcogens
  4. halogens
Show answer

Correct answer: (b) alkali metals

The radius falls across a period, so the group I element at the start of each period is the largest.

2.Why does fluorine have less electron affinity as compared to bromine? (MDCAT 2023)

  1. its electronegativity
  2. its small size and dense electronic cloud
  3. seven electrons in its outermost shell
  4. its higher ionization energy
Show answer

Correct answer: (b) its small size and dense electronic cloud

The incoming electron is crowded into a very small $2p$ shell, and the repulsion there offsets the attraction of the nucleus.

3.Which of the following has the smallest atomic radius? (MDCAT 2024)

  1. Mg
  2. S
  3. P
  4. Na
Show answer

Correct answer: (b) S

Across a period the nuclear charge rises and the radius falls, and sulphur is the furthest right of the four.

All 48 Periodic Properties and Their Trends MCQs → Periodic Properties and Their Trends notes →

s-, p-, d- and f-Block Elements

4.The electronic configurations of some elements are given below. Recognize the element that belongs to group IIIA. (MDCAT 2023)

  1. $1s^2\,2s^2\,2p^1$
  2. $1s^2\,2s^2\,2p^4$
  3. $1s^2\,2s^2\,2p^5$
  4. $1s^2\,2s^2\,2p^2$
Show answer

Correct answer: (a) $1s^2\,2s^2\,2p^1$

Three electrons in the valence shell put the element in group IIIA; this is boron.

5.Q.97 Which group of the periodic table contain non-metals, metalloids and metals. (UHS MDCAT 2023)

  1. I B
  2. VII A
  3. IV A
  4. VI A
Show answer

Correct answer: (c) IV A

Group IV runs from carbon, a non-metal, through silicon and germanium to tin and lead, which are metals.

6.Which of the following is semiconductor? (SZABMU MDCAT 2023)

  1. Al
  2. Si
  3. P
  4. Mg
Show answer

Correct answer: (b) Si

Silicon lies on the metalloid boundary of group IV and is the classic semiconductor.

All 15 s-, p-, d- and f-Block Elements MCQs → s-, p-, d- and f-Block Elements notes →

Reactions of Group I Elements

7.The alkali metals react with chlorine gas to form white metal chloride salts. The metal chloride salt formed is: (MDCAT 2023)

  1. insoluble in water
  2. soluble in water to give a neutral solution
  3. soluble in water to give an acidic solution
  4. soluble in water to give an alkaline solution
Show answer

Correct answer: (b) soluble in water to give a neutral solution

Both ions come from a strong base and a strong acid, so neither hydrolyses and the solution is neutral.

8.The difference of lithium from the other alkali metals is mainly because of its: (MDCAT 2024)

  1. large radius and low charge density
  2. small radius and low charge density
  3. large radius and high charge density
  4. small radius and high charge density
Show answer

Correct answer: (d) small radius and high charge density

The small $\mathrm{Li^+}$ ion concentrates its charge, which is why lithium resembles magnesium more than it resembles sodium.

9.Which of the following alkali metal forms only normal oxide with O2? (KMU MDCAT 2024)

  1. K
  2. Li
  3. Na
  4. Rb
Show answer

Correct answer: (b) Li

Lithium alone gives the simple oxide; sodium gives a peroxide and the rest give superoxides.

All 13 Reactions of Group I Elements MCQs → Reactions of Group I Elements notes →

Reactions of Group II Elements

10.Which of the following sulphates is insoluble in water? (MDCAT 2022)

  1. $\mathrm{BeSO_4}$
  2. $\mathrm{BaSO_4}$
  3. $\mathrm{MgSO_4}$
  4. $\mathrm{CaSO_4}$
Show answer

Correct answer: (b) $\mathrm{BaSO_4}$

Solubility of the group II sulphates falls down the group, and barium sulphate is insoluble.

11.Which one of these oxides is amphoteric in nature? (MDCAT 2023)

  1. lithium oxide
  2. beryllium oxide
  3. calcium oxide
  4. potassium oxide
Show answer

Correct answer: (b) beryllium oxide

Beryllium oxide reacts both with acids and with alkalis; the other three are basic.

12.The solubility of the sulphates of the alkaline earth metals generally: (MDCAT 2024)

  1. increases down the group
  2. decreases down the group
  3. increases then decreases down the group
  4. does not change down the group
Show answer

Correct answer: (b) decreases down the group

The lattice energy falls more slowly than the hydration energy down the group, so the sulphates become less soluble.

All 17 Reactions of Group II Elements MCQs → Reactions of Group II Elements notes →

Reactions of Group IV Elements

13.Which group of the periodic table contains non-metals, metalloids and metals? (MDCAT 2022)

  1. IB
  2. VIIA
  3. IVA
  4. IIA
Show answer

Correct answer: (c) IVA

Group IVA runs from carbon, a non-metal, through silicon and germanium, metalloids, to tin and lead, metals.

14.Which of the following has anti-knocking properties? (PMC MDCAT 2022)

  1. (CH3CH2)4Sn
  2. (CH3CH2)4Pb
  3. (CH3CH2)4Ge
  4. (CH3CH2)4Si
Show answer

Correct answer: (b) (CH3CH2)4Pb

Tetraethyl lead was added to petrol to stop it knocking.

15.Which of the following compounds is sold as fertilizer? (PMC Practice 2021)

  1. CaSiO3
  2. Na2SiO3
  3. Ca3(PO4)2
  4. MnSiO3
Show answer

Correct answer: (c) Ca3(PO4)2

Calcium phosphate is the rock from which phosphate fertilizers are made.

Reactions of Group IV Elements notes →

More MDCAT Chemistry units