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प्रश्न
The question has four options. Choose the correct answer:
A huge quantity of sewage is dumped in a river. The BOD will
विकल्प
increase
decrease
slightly decrease
remain unchanged
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उत्तर
increase
APPEARS IN
संबंधित प्रश्न
Name the various modes of waste disposal.
How can the wastes such as paper, plastic and metal objects be disposed of?
Which of the following is the best method to dispose of biological wastes from hospitals?
(a) landfill
(b) recycling
(c) incineration
(d) composting
Give reason for the following :
Broken glass utensils are a kind of non-degradable waste.
Correct the definition of certain terms given below by changing only one word.
Compost: Substances converted into manure for use in industries.
Read the poem written below and then answer the questions from the information gathered from the book or elsewhere.
Name the two kinds of waste that need to be separated from each other in two different waste bins.
Put a tick (√) against the garbage items given in Table 16.1 which could be converted into manure. Put a cross (×) against the others.
| Garbage Items | Make manure or not | |
| (i) | Egg shells | |
| (ii) | Straw | |
| (iii) | Dry flowers | |
| (iv) | Pebbles | |
| (v) | Broken pieces of glass | |
| (vi) | Nails and screws | |
| (vii) | Plastic bangles | |
| (viii) | Left over food | |
| (ix) | Steel broken vessel | |
| (x) | Dead animals |
Write 3 sentences on what comes to your mind when you chance to see the following.
A rag picker
Choose the odd one out from the following terms and name the category to which the others belong:
Give two examples of Non-biodegradable wastes.
