Which among the following always decreases in a Food chain across tropic levels?

(a)

Number

(b)

Accumulated chemicals

(c)

Energy

(d)

Force

In the E- waste generated by the Mobile Phones, which among the following metal is most abundant?

(a)

Copper

(b)

Silver

(c)

Palladium

(d)

Gold

The Hydrochlorofluorocarbons (HCFCs) are the compounds which have the following molecules:

(a)

Hydrogen

(b)

Carbon

(c)

Chlorine

(d)

Fluorine

SMOG is derived from:

(a)

Smoke

(b)

Fog

(c)

Both (a) and (b)

(d)

Only A

Excess of fluoride in drinking water causes:

(a)

Lung disease

(b)

Intestinal infection

(c)

Fluorosis

(d)

None of the above