In which of the following the polymer is correctly matched with the catalyst used for its preparation?
I. Teflon - Persulphate
II. Low density polythene - Triethyl aluminium and titanium tetrachloride
III. Terylene - Zinc acetate/antimony trioxide
Teflon (polytetrafluoroethylene or PTFE) is made by the free radical polymerization of tetrafluoroethylene. Persulphate catalysts are used in the polymerization of tetrafluoroethylene to form Teflon. Thus, I is correct.
2. Low density polythene (LDPE):LDPE is made by the free radical polymerization of ethylene under high pressure and in the presence of peroxide initiators. Triethyl aluminium and titanium tetrachloride (Ziegler-Natta catalyst) are used for the preparation of high-density polyethylene (HDPE), not LDPE. Thus, II is incorrect.
3. Terylene (Dacron):Terylene is a polyester formed by the condensation polymerization of ethylene glycol and terephthalic acid. Zinc acetate/antimony trioxide is used as a catalyst in the preparation of Terylene. Thus, III is correct.
Therefore, the correctly matched sets are I and III.
Final Answer:Amino acids are represented by the following general structure:
Find out the pair in which amino acid is correctly matched with its group R:
Sucrose is a disaccharide of which of the following?
At \(T(K)\), the rms velocity of methane is \(x \, {ms}^{-1}\). What is the kinetic energy (in J) of 8 g of methane at the same temperature
(Assume methane as an ideal gas)
Two statements are given below
Statement I: Benzanamine can be prepared from phthalimide.
Statement II: Benzanamine is less basic than phenyl methanamine.
What are X and Z in the following reaction sequence?
What is Y in the following reaction sequence?
Observe the following set of reactions:
Correct statement regarding Y and B is:
What is X in the following reaction?