What are ‘X’ and 'Y' respectively in the following reactions?
Step 1: Identifying the Reaction Pathway
1. The given transformation involves polymerization reactions:
- The first step converts a polymer used in making safety helmets into ethylene glycol (\( HO-CH_2-CH_2-OH \)).
- The second step converts ethylene glycol into a polymer used in paint manufacturing.
2. Identifying the polymers:
- The polymer used in safety helmets is polycarbonate or poly(terephthalic acid-co-bisphenol A).
- The polymer used in paint manufacturing is polyester, commonly synthesized from terephthalic acid and ethylene glycol.
Step 2: Determining X and Y
- Y (Reactant for first step): Terephthalic acid derivative leading to ethylene glycol formation.
- X (Reactant for second step): Terephthalic acid, which reacts with ethylene glycol to form polyester.
Step 3: Evaluating the Given Options
- Option (1): Correct, as it correctly identifies the structure of terephthalic acid derivatives leading to polymer formation.
- Option (2): Incorrect, as it swaps the structures incorrectly.
- Option (3): Incorrect, as it does not correctly represent the intermediate.
- Option (4): Incorrect, as it provides incorrect reactants.
Thus, the correct answer is
Option (1).
Match the following:
The correct answer is:
The following graph is obtained for the adsorption of a gas on the surface of a catalyst. The values of k and n are respectively
Observe the following reactions (not balanced):
Cl2 + NaOH → NaCl + X + H2O
Cl2 + NaOH → NaCl + Y + H2O
Which of the following is not correct?
(1) XeO2 is a colorless explosive gas
(2) SO2 is highly soluble in water
(3) Noble gases have very low boiling points
(4) The boiling point of sulphur is more than that of oxygen