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

s-, p-, d- and f-Block Elements MDCAT MCQs with answers

15 past paper MCQs on s-, p-, d- and f-Block Elements, from the s- and p-Block Elements unit of MDCAT Chemistry. The year each question appeared is shown where known; tap “Show answer” for the correct option and a short solution.

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

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

2.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
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Correct answer: (c) IV A

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

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

  1. Al
  2. Si
  3. P
  4. Mg
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Correct answer: (b) Si

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

4.Select the metal which is extracted from bauxite? (UHS MDCAT 2023)

  1. Al
  2. Ca
  3. Mg
  4. Cu
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Correct answer: (a) Al

Bauxite is hydrated aluminium oxide, from which aluminium is won by electrolysis.

5.Galvanised Iron sheets have a coating of ___________. (PMC MDCAT 2022)

  1. Tin
  2. Silver
  3. Zinc
  4. Chromium
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Correct answer: (c) Zinc

Galvanizing is coating iron with zinc, which corrodes in its place.

6.The name of a common ore from which aluminium can be extracted is called? (PMC MDCAT 2022)

  1. Charcoal
  2. Haematite
  3. Bauxite
  4. Cryolite
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Correct answer: (c) Bauxite

Bauxite is the hydrated oxide from which aluminium is extracted.

7.Which of the following products is formed by the reaction of aluminium with nitrogen? (PMC MDCAT 2022)

  1. AlN3
  2. AlN
  3. Al2N2
  4. Al3N2
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Correct answer: (b) AlN

Aluminium burns in nitrogen to the nitride, $\mathrm{AlN}$.

8.Which of the following metal occurs in free state __________ ? (PMC MDCAT 2022)

  1. Gold
  2. Iron
  3. Mercury
  4. Copper
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Correct answer: (a) Gold

Gold is so unreactive that it is found as the metal itself.

9.The Halide of aluminum is ___ ? (PMC MDCAT 2022)

  1. Electron deficient
  2. Lewis acid
  3. High melting point
  4. High boiling point
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Correct answer: (b) Lewis acid

Aluminium has only six electrons round it in the halide, so it accepts a pair and acts as a Lewis acid.

10.Fused Bauxite is electrolyzed to get: (PMC Practice 2021)

  1. Sodium
  2. Magnesium
  3. Aluminum
  4. lron
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Correct answer: (c) Aluminum

Aluminium is won by electrolysing its oxide dissolved in molten cryolite.

11.The alkali metals group lies in the ______. (PMC Practice 2021)

  1. d-block
  2. s-block
  3. f-block
  4. p-block
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Correct answer: (b) s-block

The alkali metals have their outermost electron in an s orbital.

12.Modern periodic table is arranged in ascending order of? (UHS MDCAT 2019)

  1. Nucleon number
  2. Atomic mass
  3. Proton number
  4. Mass number
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Correct answer: (c) Proton number

The modern table is arranged by atomic, that is proton, number.

13.Which of the following element is not present in halogens? (UHS MDCAT 2019)

  1. I
  2. Cl
  3. Fe
  4. F
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Correct answer: (c) Fe

Iron is a transition metal; the halogens are group VII.

14.Halogens are being used as fire extinguishers, mild antiseptic CFCs and many other organic chemicals, Which of the following halogen is used to kill the bacteria in drinking water. (UHS MDCAT 2018)

  1. Bromine
  2. Fluorine
  3. Chlorine
  4. Iodine
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Correct answer: (c) Chlorine

Chlorine is used to disinfect drinking water.

15.To avoid the oxidation of filaments which element is used in electric bulbs: (UHS MDCAT 2017)

  1. Krypton
  2. Argon
  3. Helium
  4. Neon
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Correct answer: (b) Argon

Argon is cheap, plentiful and inert, so it protects the hot filament.

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