Q18 / 180 · KCET 2012 · Chemistry

The s-block element used as a catalyst in the manufacture of Buna-S rubber is

  • A
    $\mathrm{Ca}$
  • B
    $\mathrm{Mg}$
  • Correct answer
    C
    $\mathrm{Na}$
  • D
    All of the above

Solution

Butadiene ( $75 \%$ ) and styrene (25\%) polymerise in the presence of sodium to give Buna-S-rubber.
Figure

Hence, the correct answer is option: 'C'.

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