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CBSE Notes 2011-2012

In the following groups of materials, which group (s) contains only non-biodegradable items ? (i) Wo...

Multiple choice question

In the following groups of materials, which group (s)
contains only non-biodegradable items ?
(i) Wood, paper, leather
(ii) Polythene, detergent, PVC
(iii) Plastic, detergent, grass
(iv) Plastic, bakelite, DDT

unknown

(iii)

unknown

(iv)

unknown

(i) and (iii)

unknown

(ii) and (iv)