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Q. The chemical formula of the laughing gas is
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Q. Which among the following acid is NOT a Vitamin ?
Q. Nitrogen is an essential constituent of all
Q. Which of the following one of the following contributes largely to the 'green house effect'
Q. The biological decomposition of organic substances in wastes under controlled conditions known as
Q. Two bulbs, are 40 watt and another 60 watt,are joined in series across the 220 volt mains :
Q. Curie is an unit of _______
Q. The source of energy that causes the least global warming is
Q. Noise or Noise pollution measured in:
Q. Elements that show the properties of both metals and non-metals are called
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