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Which acid is present in lemon ?

  • marlic acid
  • citric acid
  • lactic acid
  • tartaric acid

Answer: Option B

Explanation:

citric acid is present in lemon.

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  • He
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Answer: Option C

2. Why is phosphorus kept under water ?

  • to make it wet
  • to make it durable
  • water forms a protective coating on it
  • to save it from catching fire when exposed to dry air

Answer: Option D

3. What is hottest part of the gas flame is called ?

  • blue zone
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  • sodium bicarbonate
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Answer: Option C

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  • neutrons
  • electrons
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Answer: Option D

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