Alcohol is more volatile than water because _________ is lower than water
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In water treatment plant, use of chloramines ensures __________
Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water
Which one of the following is commonly used for pulp bleaching in the paper industry?
The maximum fixation of solar energy is done by
Which of the following acts as best adsorbent?
Removal of carbon particles from air involves the principle of
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