A single chlorine free radical can destroy how many ozone molecules ?
A. 10 B. 100 C. 10000 D. 100000
Chemistry MCQs
Chlorination of water may be harmful if the water contains_________________?
A. Ammonia B. Dissolved oxygen C. Carbon dixide D. All
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
Ozone hole is substantial depletion of ozone in every year during__________________?
A. Aug – Nov B. Sep – Nov C. Nov – Dec D. Dec – Jan
Which of the following solutions of H2SO4 is more concentrated ?
A. 1 Molar solution B. 1 molal solution C. 1 normal solution D. all have same concentration
Which of the following is an example of liquid in gas solution?
A. Opals B. Dust particles in smoke C. Paints D. Fog
Which of the following are the conditions of colligative properties_______________?
A. Non-electrolye solute B. Non-volatile solute C. Dilute solution D. All of the above
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. None of the above
Homogeneous mixture of two or more than two compounds is called__________________?
A. solution B. compound C. radical D. ion
Solution with maximum concentration of solute at given temperature is called________________?
A. Super saturated solution B. unsaturated solution C. saturated solution D. dilute solution