Step 1: Understanding biodegradable polymers.
Biodegradable polymers are polymers that can be broken down by microorganisms into natural substances like water, carbon dioxide, and biomass.
Step 2: Analyzing the options.
- (A) Polyethylene: This is a non-biodegradable polymer commonly used in plastic bags and packaging.
- (B) Polyamide 6,6: This is a synthetic polymer that is not biodegradable.
- (C) Polypropylene: Like polyethylene, polypropylene is a non-biodegradable polymer.
- (D) Polylactic acid: This is a biodegradable polymer derived from renewable resources such as corn starch or sugarcane. It is commonly used in biodegradable plastics.
Step 3: Conclusion.
The correct answer is (D) Polylactic acid, as it is a biodegradable polymer.
Final Answer: Polylactic acid
An electricity utility company charges ₹7 per kWh. If a 40-watt desk light is left on for 10 hours each night for 180 days, what would be the cost of energy consumption? If the desk light is on for 2 more hours each night for the 180 days, what would be the percentage-increase in the cost of energy consumption?
