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Periodic Table and Periodicity question

2021 · 27 Jul · Shift 1 · Q12
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  5. /2021 · 27 Jul · Shift 1 · Q12

Periodic Table and Periodicity question

2021 · 27 Jul · Shift 1 · Q12

JEE MainChemistryPeriodic Table and PeriodicityMCQ+4 / −1
Match List - I with List - II :

List - I List - II
(a) NaOH (i) Acidic
(b) Be(OH)2Be{(OH)_2}Be(OH)2​ (ii) Basic
(c) Ca(OH)2Ca{(OH)_2}Ca(OH)2​ (iii) Amphoteric
(d) B(OH)3B{(OH)_3}B(OH)3​
(e) Al(OH)3Al{(OH)_3}Al(OH)3​


Choose the most appropriate answer from the options given below
  1. A
    (a)-(ii), (b)-(ii), (c)-(iii), (d)-(ii), (e)-(iii)
  2. B
    (a)-(ii), (b)-(iii), (c)-(ii), (d)-(i), (e)-(iii)
  3. C
    (a)-(ii), (b)-(ii), (c)-(iii), (d)-(i), (e)-(iii)
  4. D
    (a)-(ii), (b)-(i), (c)-(ii), (d)-(iii), (e)-(iii)
View written solutionFree

Correct answer: B

  1. We identify the nature of each hydroxide/oxyacid:
  • (a)  NaOH(a)\; \mathrm{NaOH}(a)NaOH: sodium hydroxide is a strong base ⇒\Rightarrow⇒ Basic (ii).
  • (b)  Be(OH)2(b)\; \mathrm{Be(OH)_2}(b)Be(OH)2​: beryllium hydroxide is amphoteric; it reacts with both acids and bases ⇒\Rightarrow⇒ Amphoteric (iii).
  • (c)  Ca(OH)2(c)\; \mathrm{Ca(OH)_2}(c)Ca(OH)2​: calcium hydroxide is a base ⇒\Rightarrow⇒ Basic (ii).
  • (d)  B(OH)3(d)\; \mathrm{B(OH)_3}(d)B(OH)3​: this is boric acid, which behaves as an acidic substance ⇒\Rightarrow⇒ Acidic (i).
  • (e)  Al(OH)3(e)\; \mathrm{Al(OH)_3}(e)Al(OH)3​: aluminium hydroxide is amphoteric ⇒\Rightarrow⇒ Amphoteric (iii).
  1. So the correct matching is:
(a)−(ii),(b)−(iii),(c)−(ii),(d)−(i),(e)−(iii)(a)-(ii),\quad (b)-(iii),\quad (c)-(ii),\quad (d)-(i),\quad (e)-(iii)(a)−(ii),(b)−(iii),(c)−(ii),(d)−(i),(e)−(iii)
  1. Compare with the given options:
  • Option B matches exactly.

Therefore, the correct answer is B.

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