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mnsoomro
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Which one of the following makes the bulk of hydrosphere content ?
a. oceans B. glaciers & icecaps C. fresh water lakes and ponds D. All have equal distribution Submitted by :-…
When common salt is dissolved in water ?
a. Boiling point of water decrease B. Boiling point of water increase C. Boiling point of water remains same D.…
Which of the following are the conditions of colligative properties_______________?
A. Non-electrolyte solute B. Non-volatile solute C. Dilute solution D. All of the above Submitted by :- Jamil Ahmed
Which of the following is an example of liquid in gas solution?
A. Opals B. Dust particles in smoke C. Paints D. Fog Submitted by :- Jamil Ahmed
Ozone hole is substantial depletion of ozone in every year during__________________?
A. Aug – Nov B. Sep – Nov C. Nov – Dec D. Dec – Jan Submitted by :- Jamil…
Which of the following is used as water disinfectant to avoid the formation of toxic compounds_________________?
A. Cl2 B. O3 C. ClO2 D. both B & C Submitted by :- Jamil Ahmed
Chlorination of water may be harmful if the water contains_________________?
A. Ammonia B. Dissolved oxygen C. Carbon dioxide D. All Submitted by :- Jamil Ahmed
Which of the following factors help to measure quality of water ?
A. DO B. BOD C. COD D. all of the above Submitted by :- Jamil Ahmed
Which of the following gases is the main cause of acid rain ?
A. CO B. NO2 C. both a & b D. none of the above Submitted by :- Jamil Ahmed
Solution of Na2SO4 will be_________________?
A. basic B. acidic C. neutral D. cannot be predicted without data Submitted by :- Jamil Ahmed