Biology
Assertion (A): Electronic wastes do not contain any harmful substances or valuable materials.
Reason (R): Computers, mobile phones, batteries, etc. contain lead, cadmium, silver and copper.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Waste Generation & Management
1 Like
Answer
A is False and R is True.
Reason — E-waste contains both harmful substances (like lead, mercury, cadmium) and valuable materials (like gold, silver, copper). That is why proper recycling is essential—to recover valuable metals and prevent environmental harm.
These electronic items contain toxic heavy metals (like lead and cadmium) and valuable metals (like silver and copper), which are extracted during e-waste recycling.
Answered By
2 Likes
Related Questions
Assertion (A): Clothes that are very old and torn are termed as rags. Rags are a kind of domestic waste.
Reason (R): Rags can be considered as a municipal waste which cannot be reused or recycled.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): Incineration is the disposal of waste by dumping it in a pit.
Reason (R): Incineration is harmful as it releases fumes and harmful substances.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): Electrostatic precipitators remove gaseous air pollutants by attracting them to electrically charged plates.
Reason (R): The electrostatic precipitators can remove upto 90% of particulate matter from thermal plants.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Name the following :
(a) The solid precipitated material produced during secondary treatment of the effluent, carried out in the Effluent Treatment Plants.
(b) The two types of devices commonly used for removing the particulate air pollutants.
(c) The process of disposal of waste by burning.
(d) The solid waste residue left after burning.
(e) The category of wastes given out from homes.