PUMPA - SMART LEARNING

எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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1. Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour? Explain.  
2. Paheli had heard that rainwater is as good as distilled water. So she collected some rainwater in a clean glass tumbler and tested it using a tester. To her surprise, she found that the compass needle showed deflection. What could be the reasons?
  
Rainwater is pure water which is an , but when it comes into contact with pollutants in the air, such as  and nitrogen oxides, it forms an\a , which is a good conductor of electricity.