Basic Science : Environment In Relation To Human Welfare QUESTIONS AND ANSWERS :: part3 : 6 to 10
Following Basic Science multiple choice objective type questions and answers will help you in many types of 2024 job and other entrance examinations :
6.The unit of sound is |
| Frequency |
| Calorie |
| Decibel |
| Moles |
7.The sub-soil water gets polluted due to |
| Insecticides and pesticides |
| Ceramics and plastics |
| Mercuric chloride and PVC |
| Aluminium cans and plastics |
8.Any unpleasant and unwanted sound dumped into atmosphere and causing adverse effect is |
| Air pollution |
| Noise pollution |
| Land pollution |
| Water pollution |
9.Permissible levels of noise recognized by Industrial Noise Survey of India is |
| 61 to 100 dB |
| 71 to 110 dB |
| 81 to 120 dB |
| 91 to 130 dB |
10.Soil fertility and life of soil microbes are affected by |
| Domestic sewage |
| Plastics |
| Detergents |
| Ceramics |
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