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NEET 2011
Exam
NEET
Year
2011
Subject
Chemistry
Chapter
p Block Elements (Group 13 & 14)

NEET 2011 · Chemistry · p Block Elements (Group 13 & 14)

Which of the following statements is incorrect?

Which of the following statements is incorrect?

Options

  1. APure sodium metal dissolves in liquid ammonia to give blue solution
  2. BNaOH\mathrm{NaOH} reacts with glass to give sodium silicate
  3. CAluminium, reacts with excess NaOH\mathrm{NaOH} to give Al(OH)3\mathrm{Al}(\mathrm{OH})_3
  4. DNaHCO3\mathrm{NaHCO}_3 on heating gives Na2CO3\mathrm{Na}_2 \mathrm{CO}_3

Correct answer

C. Aluminium, reacts with excess NaOH\mathrm{NaOH} to give Al(OH)3\mathrm{Al}(\mathrm{OH})_3

Step-by-step solution

Aluminium being amphoteric reacts with aqueous alkalies with the evolution of H2\mathrm{H}_2 gas. 2Al(s)+2NaOH(aq)+6H2O(l)⟶2Na+[Al(OH)4]−(aq)+3H2(g)↑2 \mathrm{Al}(s) +2 \mathrm{NaOH}(a q)+6 \mathrm{H}_2 \mathrm{O}(l) \longrightarrow 2 \mathrm{Na}^{+}\left[\mathrm{Al}(\mathrm{OH})_4\right]^{-}(a q)+3 \mathrm{H}_2(g) \uparrow sodium tetrahydroxoaluminate (III).
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