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.

Options

(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)

Environment › PollutionXSources

2013

Which of the following can be found as pollutants in the drinking water in some parts of India?
(1). Arsenic
(2). Sorbitol
(3). Fluoride
(4). Formaldehyde
(5). Uranium
Select the correct answer using the codes given below.

Options

(a)

1 and 3 only

(b)

2, 4 and 5 only

(c)

1, 3 and 5 only

(d)

1, 2, 3, 4 and 5

Answer

(C)

Environment › PollutionXSources

2013

Photochemical smog is a resultant of the reaction among

Options

(a)

NO 2 , O 3 and peroxyacetyl nitrate in the prescence of sunlight

(b)

CO 2 , O 2 , and peroxyacetyl nitrate in the presence of sunlight

(c)

CO, CO 2 , and NO 2 at low temperature

(d)

high concentration of NO 2 , O 3 and CO in the evening

Answer

(A)