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NEET2022Chemistryp Block Elements (Group 13 & 14)Actual

Match List-I with List-II : ( array l|l List-I & List-II (Compounds) & (Molecular formula) (a) Borax & (i) NaBO ₂ (b) Kernite & (ii) Na ₂ ~B ₄ O ₇ 4 H ₂ O (c) Orthoboric acid & (iii) H ₃ BO ₃ (d) Borax bead & (iv) Na ₂ ~B ₄ O ₇ 10 H ₂ O array ) Choose the correct answer from the options given below :

Options

  1. A(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
  2. B(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
  3. C(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
  4. D(a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)

Correct answer

A. (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)

Step-by-step solution

(a) Borax - Na ₂ ~B ₄ O ₇ 10 H ₂ O or Na ₂ [ ~B ₄ O ₅( OH )₄ ] 8 H ₂ O (b) Kernite - Na ₂ ~B ₄ O ₇ 4 H ₂ O (c) Orthoboric acid - H ₃ BO ₃ (d) Borax bead - NaBO ₂ (obtained by heating of borax) Na ₂ ~B ₄ O ₇ 10 H ₂ O -10 H ₂ O Na ₂ ~B ₄ O ₇ 2 NaBO ₂+ B ₂ O ₃ Sodium metaborate

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