Advertisements
Advertisements
प्रश्न
a) What is clean technology ?
b) Why is it essential to ban plastic bags?
उत्तर
a) The clean technology is the control over air pollution, soil pollution and water pollution with the help of microbes.
b) There is extensive use of plastic bags.
i) Even after many years, plastic is not decomposed and the contents in it do not dissolve leads to soil pollution.
ii) Plastic bags thrown in drains obstruct the flow of streams, stagnant sewage water is a cause of many diseases.
iii) The plastic bags are eaten by the cattle can lead to stomach cancer.
iv) The poisonous gas mixes in the environment by burning plastic bags. Due to many such hazardous consequences, plastic bags should be banned.
APPEARS IN
संबंधित प्रश्न
If a piece of bread is kept in a container in moist place for 2 – 3 days,
1. What will you see?
2. Write scientific name and a character of the organism you may observe.
Explain the importance of biopesticides in organic farming.
Give reasons.
Bread 'rises' during baking.
Find an odd one out.
Find an odd one out.
Vinegar means 4% ___________.
Saccharomyces cerevisiae : Ethanol : : Aspergillus oryzae : ________________
Spinosad is a biopesticide.
Which microbes convert uranium to its insoluble salts?
Write a short note.
Microbial Enzymes
Write a short note.
Bio-fuels
Observe the figure and write the answers to the questions asked.
- Name the above figure.
- What is it used for?
- Which gas is formed in it?
- How is this gas formed?
- What is done with sewage?
Complete the paragraph by selecting the appropriate option in parentheses.
(energy, microbial, erosion-proof, reused, purification, environmentally friendly)
Nowadays, instead of chemical catalysts, _______ enzymes are used in the chemical industry. These enzymes are active at low temperature, pH and pressure; due to which _______ is saved and _______ instruments are also not necessary. Enzymes carry out specific processes; hence unnecessary by-products are not formed due to which expenses on _______ are minimised. In case of microbial enzymatic reactions elimination and decomposition of waste material is avoided and enzymes can be _______ Hence, such enzymes are _______.
Diptheria affects the ______.
Which enzyme was used earlier for cheese production?
Give a scientific reason.
Why it is necessary to ban the use of plastic bags?
Complete the chart on production of beverages.
| S. No. | Fruit | Microbe used | Role of microbe used | Name of beverage |
| (a) | Caffea arabica | ______ | Separating seeds from fruit | Coffee |
| (b) | Theobroma cacao | Candida, Hansenula, Pichia, Saccharomyces | ______ | Cocoa |
Complete the following chart:
The figure below shows a concept of segregation, observe the following figure and answer the questions that follow:
- What is dry and wet waste?
- Why do we need to segregate our garbage?
