Select the correct statements

1)    Adulteration of mustard oil with Argemone oil can cause ‘dropsy’.

2)    Adulteration of Dal is done by Kesari Dal or a dye

3)    Chlorine as a disinfectant kills pathogenic bacteria but has no affect on spores and certain viruses like polio, jaundice etc. in water.

4)    Ozone inactivates viruses and removes undesirable odour in water.

5)    Storage of water in Copper vessels and Eathen vessels with camphor or tulsi will reduce microbial population.

6)    Iodine can be used as emergency disinfectant of water.

7)    Use of bleaching powder is the cheapest method of disinfecting a well.

Which of the statement(s) given above are correct?