Multiple choice

Match the following ||| |---|---| |Column - I |Column - II| |A. Hf |1. Polymerisation| |B. Al(C2H5)3/TiCl4 |2. Making of lead-free petrol| |C. VC2 |3. Neutron moderator| |D. Pt-Re alloys|4. Acetylene production|

  1. A - 2, B - 1, C - 4, D - 3

  2. A - 3, B - 4, C - 1, D - 2

  3. A - 3, B - 1, C - 4, D - 2

  4. A - 4, B - 2, C - 1, D - 2

  5. A - 4, B - 1, C - 2, D - 3
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This option is correct. Hafnium is used to make control rods for regulating the free neutron levels in the nuclear reactors employed in submarines. The mixture of Al(C2H5)3 and TiCl4 is called Zeigler-Natta catalyst and is used extensively in polymerising alkenes (like ethylene to polyethylene). VC2 (vanadium carbide), on treatment with water, produces acetylene and thus, is used in the production of acetylene. Pt-Re alloys are used as catalysts for making low-lead or lead-free petrol.

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