Write T for True and F for False statements.
Melamine and Bakelite are examples of thermoplastics.
Plastics are soluble in water.
PET is used for making sanitary fittings.
The harmful effects associated with plastic disposal are reducing the usage of plastics.
Answer (2)
The correct evaluations of the statements are as follows: Melamine and Bakelite are thermosetting plastics (F), plastics are generally not water-soluble (F), PET is not used for sanitary fittings (F), and awareness of plastic disposal issues is reducing plastic usage (T).
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Let's evaluate each statement one by one:
Melamine and Bakelite are examples of thermoplastics.
False (F): Melamine and Bakelite are examples of thermosetting plastics, not thermoplastics. Thermosetting plastics become hard and rigid upon heating and cannot be remolded. In contrast, thermoplastics can be softened and reshaped upon heating.
Plastics are soluble in water.
False (F): Most plastics are insoluble in water. Their chemical structure is designed to be resistant to chemicals and moisture, which is why plastics are used in applications where water resistance is necessary.
PET is used for making sanitary fittings.
False (F): PET, or Polyethylene terephthalate, is mainly used in making beverage bottles and food containers because it is clear, strong, and lightweight. Sanitary fittings are usually made from materials like stainless steel, ceramics, or other types of plastics like uPVC.
The harmful effects associated with plastic disposal are reducing the usage of plastics.
True (T): The harmful environmental effects of improperly disposed plastics, such as pollution and harm to wildlife, have led to increased awareness and efforts to reduce plastic usage. Many countries and organizations are implementing policies to reduce plastic waste by promoting recycling and using alternative materials.
To conclude, the corrected statements are:
F
F
F
T
