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Nov. 05 Question number 19 is it D Because zinc carbonate and zinc hydroxide are insoluble ?
No not because it is not soluble, but to prepare a salt one requires an excess of a solid carbonate and hydroxide to react with the acid.
 
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Oh It's simple :)
humidity out must be low... so the water moved out due to Osmosis that's why the plant looks so thin..
and light intensity high ... as high light intensity means more loss of water :)
Hence , the correct answer is C .
Life saver,
 
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hydrogen and chlorine react as shown :
1 molecule of hydrogen + 1 molecule of chlorine → 2 molecules of hydrogen chloride. What is the equation for this reaction ?
 
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