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Q. n nuclear reactor, Chain reaction is controlled by introducing
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Q. Which of the following has the longest wave length?
Q. What is the chemical symbol of mercury?
Q. The main purification/separation procedure used in petroleum industry is
Q. Temporary hardness is due to the presence of
Q. Which metal does not undergo corrosion due to the formation of oxide layer?
Q. The depletion in Ozone layer is caused by ________ .
Q. Which of the following practices is found in vinegar and pickle?
Q. When formaldehyde & potassium hydroxide are heated, we get
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