Due to improper/indiscriminate disposal of old and used computers or their parts, which of the

2013

Due to improper/indiscriminate disposal of old and used computers or their parts, which of the
following are released into the environment as e-waste?
(1). Beryllium
(2). Cadmium
(3). Chromium
(4). Heptachlor
(5). Mercury
(6). Lead
(7). Plutonium
Select the correct answer using the codes given below.

(a)

1, 3, 4, 6 and 7 only

(b)

1, 2, 3, 5 and 6 only

(c)

2, 4, 5 and 7 only

(d)

1, 2, 3, 4, 5, 6 and 7

Answer:

(b)

Non-traditional

Explanation

Beryllium is used in circuit board, Hard disk drive, Motherboard, Wiring board and Connectors.So Option C is wrong.Mercury is a key part of some modern technologies, including LCD screens ,Laptop and computers so Option A is also wrong.Heptachlor is an organochlorine compound that was used as an insecticide. So Option D is also wrong.If initially we are sure about Heptachlor then we can easily eliminate A,C and D.So correct answer is B.Tikdam: